Hermit crabs are anomuran decapod crustaceans of the superfamily Paguroidea that have adapted to occupy empty scavenged mollusc shells to protect their fragile exoskeletons. There are over 800 species of hermit crab, most of which possess an asymmetric abdomen concealed by a snug-fitting shell. Hermit crabs' non-calcified abdominal exoskeleton makes their exogenous shelter system obligatory. Hermit crabs must occupy shelter produced by other organisms, or risk being defenseless against nature and its occupants. The strong association between hermit crabs and their shelters has significantly influenced their biology. Almost 800 species carry mobile shelters (most often calcified snail shells); this protective mobility contributes to the diversity and multitude of crustaceans found in almost all marine environments. In most species, development involves metamorphosis from symmetric, free-swimming larvae to morphologically asymmetric, benthic-dwelling, shell-seeking crabs. Such physiological and behavioral extremes facilitate transition to a sheltered lifestyle, revealing the extensive evolutionary lengths that led to their superfamily success. 24455

The Wulingyuan peak forest landform in Zhangjiajie represents a unique geomorphic and physicogeographical feature. The peak forest was developed in Devonian Taiyunguan and Huangjiadeng formations, with a distribution area of 86km2. It is a world-rare and unique landform formed in a special tectonic position and under particular conditions of neotectonism and exogenous processes. More than 3,000 rock peaks aloft within the area, of which 1,000 peaks exceed 200m in height, and Jinbianyan exceeds even 350m. The individual geometry includes mesa, platform, peak wall, peak cluster, peak forest, crosscut, stone door, natural bridge and valley, etc. The geopark is centralized by its sandstone peak forest unparalleled in the world, lined with karst landscape, and has many geological heritages such as shaped geological sections, special fossil relic. These constitute a geomorphic assembly of sandstone peak forest with particular characteristics

 

Taken @ZhangJiaJie, China

Danxia landform in Zhangye,China.

Danxia landform, formed from red sandstone and characterised by steep cliffs, which are caused by endogenous forces (including uplift) and exogenous forces(including weathering and erosion).

--From Wikipedia

 

Thanks for your visit,comment and fave :-)

Danxia landform in Zhangye,China.

Danxia landform, formed from red sandstone and characterised by steep cliffs, which are caused by endogenous forces (including uplift) and exogenous forces(including weathering and erosion).

--From Wikipedia

 

Thanks for your visit,comment and fave :-)

The Wulingyuan peak forest landform in Zhangjiajie represents a unique geomorphic and physicogeographical feature. The peak forest was developed in Devonian Taiyunguan and Huangjiadeng formations, with a distribution area of 86km2.

It is a world-rare and unique landform formed in a special tectonic position and under particular conditions of neotectonism and exogenous processes. More than 3,000 rock peaks aloft within the area, of which 1,000 peaks exceed 200m in height, and Jinbianyan exceeds even 350m. The individual geometry includes mesa, platform, peak wall, peak cluster, peak forest, crosscut, stone door, natural bridge and valley, etc.

The geopark is centralized by its sandstone peak forest unparalleled in the world, lined with karst landscape, and has many geological heritages such as shaped geological sections, special fossil relic. These constitute a geomorphic assembly of sandstone peak forest with particular characteristics

 

Taken @ZhangJiaJie, China

Exogenous digestion | Exogene Verdauung

Cuando no consigo mis objetivos fotográficos tiendo a responsabilizar de mis fracasos a toda una retahíla de agentes exógenos, convirtiendo al fotógrafo en una simple víctima de las circunstancias. La escasez de circulaciones ferroviarias , los grafiteros y las incidencias en el tráfico por carretera suelen ser los malos habituales de la película pero, por encima de todos ellos, el máximo antagonista al que me enfrento es la caprichosa meteorología de La Bureba, pésimamente interpretada, además, por los modelos de predicción que maneja la Agencia Estatal de Meteorología (AEMET). Ya estoy muy acostumbrado a venir hasta aquí con la promesa de un día soleado y tener que volver a casa con el rabo entre las piernas al toparme con una procelosa tempestad. Eso es duro, muy duro....aunque peor es quedarse en casa por mor de un pronóstico adverso y comprobar al día siguiente como ese fotógrafo que te cae tan mal ha conseguido una imagen sensacional con la complicidad de un sol radiante. Pero bueno, hay que ser sincero y reconocer que a veces clavan el pronóstico de una forma admirable. El día que hicimos esta foto, en muchos kilómetros a la redonda no se vio el sol en todo el día y, sin embargo, en este punto hizo acto de presencia a la hora anunciada por la AEMET coincidiendo con el paso de este precioso portacoches. Toda una liberación para el atribulado fotógrafo que, por cierto, había llegado hasta este punto con la sensación de que era un completo cretino por haber seguido adelante pese a que las circunstancias aconsejaban lo contrario.

 

When I don't achieve my photographic goals, I tend to blame my failures on a whole string of exogenous agents, turning the photographer into a simple victim of circumstances. The lack of railway traffic, graffiti artists and incidents in road traffic are usually the usual bad guys in the story but, above all of them, the main antagonist I face is the capricious weather of La Bureba, badly interpreted, in addition, by the prediction models managed by the State Meteorological Agency (AEMET). I am already very used to coming here with the promise of a sunny day and having to return home with my tail between my legs when I run into a storm. That's hard, very hard....although it's worse to stay at home because of an adverse prognosis and see the next day how that photographer you don't like so much has achieved a sensational image with the complicity of a radiant sun. But hey, you have to be honest and admit that sometimes they nail the forecast in an admirable way. The day we took this photo, for many kilometers around the sun was not seen all day and, however, at this point it made an appearance at the time announced by the AEMET, coinciding with the passage of this beautiful car transporter. Quite a release for the troubled photographer who, by the way, had come to this point feeling that he was a complete cretin for having gone ahead despite circumstances advising otherwise.

Funny how looks can be deceiving. This is an edible mushroom, and a very tasty one at that, rich in calcium, potassium, iron, copper, zinc, magnesium, niacin and some exogenous amino acids. But its appearance doesn't seem to inspire trust, so it's routinely left alone :-).

Danxia landform in Zhangye,China.

Danxia landform, formed from red sandstone and characterised by steep cliffs, which are caused by endogenous forces (including uplift) and exogenous forces(including weathering and erosion).

--From Wikipedia

 

Thanks for your visit,comment and fave :-)

Danxia landform in Zhangye,China.

Danxia landform, formed from red sandstone and characterised by steep cliffs, which are caused by endogenous forces (including uplift) and exogenous forces(including weathering and erosion).

--From Wikipedia

 

Thanks for your visit,comment and fave :-)

Danxia landform in Zhangye,China.

Danxia landform, formed from red sandstone and characterised by steep cliffs, which are caused by endogenous forces (including uplift) and exogenous forces(including weathering and erosion).

--From Wikipedia

Mash up of an old photography idea + an even older drawing idea + a scene from Hannibal.

 

It sure was awkward taking this photo! Got sore torso the next day too.

Objective phenomena

Regulatory changes

Arise exogenously

Danxia landform in Zhangye,China.

Danxia landform, formed from red sandstone and characterised by steep cliffs, which are caused by endogenous forces (including uplift) and exogenous forces(including weathering and erosion).

--From Wikipedia

A living tree museum inside the Belgrade Forest that forms part of the Forestry Faculty of the Istanbul university. This leafy oasis set around three lakes has a wide range of indigenous and exogenous trees and non-native trees. A stroll around this peaceful spot offers not only a chance to get some fresh air but to also learn a little botany.

 

orman.istanbul.edu.tr/?p=5982

There are over 800 species of hermit crab, most of which possess an asymmetric abdomen concealed by a snug-fitting shell. Hermit crabs' non-calcified abdominal exoskeleton makes their exogenous shelter system obligatory. Hermit crabs must occupy shelter produced by other organisms, or risk being defenseless.

EXOGENOUS STRUCTURE / PORTRAIT / / SPECIAL EDIT / THE FINAL / CHRISTELLE GEISER & AEON VON ZARK / NAKED EYE PROJECT BIENNE / ALTERED STATE SERIE / THE WEIRD DREAM / PORTRAIT.

I think this is the most important chart in technology business.

 

(It's an updated version of Ray Kurzweil's published work, posted with permission, and updated here through 2016. Further UPDATE here, post Tesla AI Day.)

 

In this abstraction of Moore’s Law, Kurzweil plots computational power on a logarithmic scale, and finds a double exponential curve that holds over 100 years (a straight line would represent a geometrically compounding curve of progress).

 

In the modern era of accelerating change in the tech industry, it is hard to find even five-year trends with any predictive value, let alone trends that span the centuries.

 

Ray argues that through five paradigm shifts – such as electro-mechanical calculators and vacuum tube computers – the computational power that $1000 buys has doubled every two years. For the past 30 years, it has been doubling every year.

 

Each dot is the frontier of computational price performance of the day. One machine was used in the 1890 Census; one cracked the Nazi Enigma cipher in World War II; one predicted Eisenhower’s win in the 1956 Presidential election.

 

Each dot represents a human drama. They did not realize that they were on a predictive curve. Each dot represents an attempt to build the best computer with the tools of the day. Of course, we use these computers to make better design software and manufacturing control algorithms. And so the progress continues.

 

Notice that the pace of innovation is exogenous to the economy. The Great Depression and the World Wars and various recessions do not introduce a meaningful change in the long-term trajectory of Moore’s Law. Certainly, the adoption rates, revenue, profits and economic fates of the computer companies behind the various dots on the graph may go though wild oscillations, but the long-term trend emerges nevertheless.

 

Any one technology, such as the CMOS transistor, follows an elongated S-shaped curve of slow progress during initial development, upward progress during a rapid adoption phase, and then slower growth from market saturation over time. But a more generalized capability, such as computation, storage, or bandwidth, tends to follow a pure exponential – bridging across a variety of technologies and their cascade of S-curves.

 

Moore’s Law is commonly reported as a doubling of transistor density every 18 months. But this is not something the co-founder of Intel, Gordon Moore, has ever said. It is a nice blending of his two predictions; in 1965, he predicted an annual doubling of transistor counts in the most cost effective chip and revised it in 1975 to every 24 months. With a little hand waving, most reports attribute 18 months to Moore’s Law, but there is quite a bit of variability. The popular perception of Moore’s Law is that computer chips are compounding in their complexity at near constant per unit cost. This is one of the many abstractions of Moore’s Law, and it relates to the compounding of transistor density in two dimensions. Others relate to speed (the signals have less distance to travel) and computational power (speed x density).

 

Unless you work for a chip company and focus on fab-yield optimization, you do not care about transistor counts. Integrated circuit customers do not buy transistors. Consumers of technology purchase computational speed and data storage density. When recast in these terms, Moore’s Law is no longer a transistor-centric metric, and this abstraction allows for longer-term analysis.

 

What Moore observed in the belly of the early IC industry was a derivative metric, a refracted signal, from the bigger trend, the trend that begs various philosophical questions and predicts mind-bending futures.

 

Moore’s Law is a primary driver of disruptive innovation, such as the iPod usurping the Sony Walkman franchise , and it drives not only IT and Communications and has become the primary driver in drug discovery and bioinformatics, medical imaging and diagnostics. As Moore’s Law crosses critical thresholds, a formerly lab science of trial and error experimentation becomes a simulation science and the pace of progress accelerates dramatically, creating opportunities for new entrants in new industries.

 

This non-linear pace of progress has been the primary juggernaut of perpetual market disruption, spawning wave after wave of opportunities for new companies.

 

I just watched Transcendent Man, so I have Kurzweil on the mind.

NOTE: this is a semi-log graph, so a straight line is an exponential; each y-axis tick is 100x. This graph covers a 100,000,000,000,000,000,000x improvement in computation/$.

 

I have color coded it to show the transition among the integrated circuit architectures. I also added the current NVIDIA workhorses — the A100 and H100. You can see how the mantle of Moore's Law has transitioned most recently from the GPU (green dots) to the ASIC (yellow and orange dots), and the H100 itself is a transitionary species — from GPU to ASIC, with 8-bit performance optimized for AI models. Remember, there are thousands of invisible dots below the frontier of humanity's capacity to compute (e.g., everything from Intel in the past 13 years).

 

Tesla DOJO's dominance should not be a surprise, as Intel ceded leadership to NVIDIA a decade ago, and further handoffs were inevitable. The computational frontier has shifted across many technology substrates over the past 120 years, most recently from the CPU to the GPU to ASICs optimized for neural networks (the majority of new compute cycles).

 

Of all of the depictions of Moore’s Law, this is the one (originally by Ray Kurzweil) that I find to be the most useful, as it captures what customers actually value — computation per constant dollar.

 

Humanity’s capacity to compute has compounded for as long as we can measure it, exogenous to the economy, and starting long before Intel co-founder Gordon Moore noticed a refraction of the longer-term trend in the belly of the fledgling semiconductor industry in 1965.

 

Why the transition within the integrated circuit era? Intel lost to NVIDIA for neural networks because the fine-grained parallel compute architecture of a GPU maps better to the needs of deep learning. There is a poetic beauty to the computational similarity of a processor optimized for graphics processing and the computational needs of a sensory cortex, as commonly seen in neural networks today. A custom chip (like the Tesla D1 ASIC) optimized for neural networks extends that trend to its inevitable future in the digital domain. Further advances are possible in analog in-memory compute, an even closer biomimicry of the human cortex. The best business planning assumption is that Moore’s Law, as depicted here, will continue for the next 20 years as it has for the past 120.

 

For those unfamiliar with this chart, here is a more detailed description:

 

Moore's Law is both a prediction and an abstraction

 

Moore’s Law is commonly reported as a doubling of transistor density every 18 months. But this is not something the co-founder of Intel, Gordon Moore, has ever said. It is a nice blending of his two predictions; in 1965, he predicted an annual doubling of transistor counts in the most cost effective chip and revised it in 1975 to every 24 months. With a little hand waving, most reports attribute 18 months to Moore’s Law, but there is quite a bit of variability. The popular perception of Moore’s Law is that computer chips are compounding in their complexity at near constant per unit cost. This is one of the many abstractions of Moore’s Law, and it relates to the compounding of transistor density in two dimensions. Others relate to speed (the signals have less distance to travel) and computational power (speed x density).

 

Unless you work for a chip company and focus on fab-yield optimization, you do not care about transistor counts. Integrated circuit customers do not buy transistors. Consumers of technology purchase computational speed and data storage density. When recast in these terms, Moore’s Law is no longer a transistor-centric metric, and this abstraction allows for longer-term analysis.

 

What Moore observed in the belly of the early IC industry was a derivative metric, a refracted signal, from a longer-term trend, a trend that begs various philosophical questions and predicts mind-bending futures.

 

Ray Kurzweil’s abstraction of Moore’s Law shows computational power on a logarithmic scale, and finds a double exponential curve that holds over 120 years! A straight line would represent a geometrically compounding curve of progress.

 

Through five paradigm shifts – such as electro-mechanical calculators and vacuum tube computers – the computational power that $1000 buys has doubled every two years. For the past 35 years, it has been doubling every year.

 

Each dot is the frontier of computational price performance of the day. One machine was used in the 1890 Census; one cracked the Nazi Enigma cipher in World War II; one predicted Eisenhower’s win in the 1956 Presidential election. Many of them can be seen in the Computer History Museum.

 

Each dot represents a human drama. Prior to Moore’s first paper in 1965, none of them even knew they were on a predictive curve. Each dot represents an attempt to build the best computer with the tools of the day. Of course, we use these computers to make better design software and manufacturing control algorithms. And so the progress continues.

 

Notice that the pace of innovation is exogenous to the economy. The Great Depression and the World Wars and various recessions do not introduce a meaningful change in the long-term trajectory of Moore’s Law. Certainly, the adoption rates, revenue, profits and economic fates of the computer companies behind the various dots on the graph may go though wild oscillations, but the long-term trend emerges nevertheless.

 

Any one technology, such as the CMOS transistor, follows an elongated S-shaped curve of slow progress during initial development, upward progress during a rapid adoption phase, and then slower growth from market saturation over time. But a more generalized capability, such as computation, storage, or bandwidth, tends to follow a pure exponential – bridging across a variety of technologies and their cascade of S-curves.

 

In the modern era of accelerating change in the tech industry, it is hard to find even five-year trends with any predictive value, let alone trends that span the centuries. I would go further and assert that this is the most important graph ever conceived.

 

Why is this the most important graph in human history?

 

A large and growing set of industries depends on continued exponential cost declines in computational power and storage density. Moore’s Law drives electronics, communications and computers and has become a primary driver in drug discovery, biotech and bioinformatics, medical imaging and diagnostics. As Moore’s Law crosses critical thresholds, a formerly lab science of trial and error experimentation becomes a simulation science, and the pace of progress accelerates dramatically, creating opportunities for new entrants in new industries. Boeing used to rely on the wind tunnels to test novel aircraft design performance. Ever since CFD modeling became powerful enough, design moves to the rapid pace of iterative simulations, and the nearby wind tunnels of NASA Ames lie fallow. The engineer can iterate at a rapid rate while simply sitting at their desk.

 

Every industry on our planet is going to become an information business. Consider agriculture. If you ask a farmer in 20 years’ time about how they compete, it will depend on how they use information, from satellite imagery driving robotic field optimization to the code in their seeds. It will have nothing to do with workmanship or labor. That will eventually percolate through every industry as IT innervates the economy.

 

Non-linear shifts in the marketplace are also essential for entrepreneurship and meaningful change. Technology’s exponential pace of progress has been the primary juggernaut of perpetual market disruption, spawning wave after wave of opportunities for new companies. Without disruption, entrepreneurs would not exist.

 

Moore’s Law is not just exogenous to the economy; it is why we have economic growth and an accelerating pace of progress. At Future Ventures, we see that in the growing diversity and global impact of the entrepreneurial ideas that we see each year. The industries impacted by the current wave of tech entrepreneurs are more diverse, and an order of magnitude larger than those of the 90’s — from automobiles and aerospace to energy and chemicals.

 

At the cutting edge of computational capture is biology; we are actively reengineering the information systems of biology and creating synthetic microbes whose DNA is manufactured from bare computer code and an organic chemistry printer. But what to build? So far, we largely copy large tracts of code from nature. But the question spans across all the complex systems that we might wish to build, from cities to designer microbes, to computer intelligence.

 

Reengineering engineering

 

As these systems transcend human comprehension, we will shift from traditional engineering to evolutionary algorithms and iterative learning algorithms like deep learning and machine learning. As we design for evolvability, the locus of learning shifts from the artifacts themselves to the process that created them. There is no mathematical shortcut for the decomposition of a neural network or genetic program, no way to "reverse evolve" with the ease that we can reverse engineer the artifacts of purposeful design. The beauty of compounding iterative algorithms (evolution, fractals, organic growth, art) derives from their irreducibility. And it empowers us to design complex systems that exceed human understanding.

 

Why does progress perpetually accelerate?

 

All new technologies are combinations of technologies that already exist. Innovation does not occur in a vacuum; it is a combination of ideas from before. In any academic field, the advances today are built on a large edifice of history. . This is why major innovations tend to be 'ripe' and tend to be discovered at the nearly the same time by multiple people. The compounding of ideas is the foundation of progress, something that was not so evident to the casual observer before the age of science. Science tuned the process parameters for innovation, and became the best method for a culture to learn.

 

From this conceptual base, come the origin of economic growth and accelerating technological change, as the combinatorial explosion of possible idea pairings grows exponentially as new ideas come into the mix (on the order of 2^n of possible groupings per Reed’s Law). It explains the innovative power of urbanization and networked globalization. And it explains why interdisciplinary ideas are so powerfully disruptive; it is like the differential immunity of epidemiology, whereby islands of cognitive isolation (e.g., academic disciplines) are vulnerable to disruptive memes hopping across, much like South America was to smallpox from Cortés and the Conquistadors. If disruption is what you seek, cognitive island-hopping is good place to start, mining the interstices between academic disciplines.

 

It is the combinatorial explosion of possible innovation-pairings that creates economic growth, and it’s about to go into overdrive. In recent years, we have begun to see the global innovation effects of a new factor: the internet. People can exchange ideas like never before Long ago, people were not communicating across continents; ideas were partitioned, and so the success of nations and regions pivoted on their own innovations. Richard Dawkins states that in biology it is genes which really matter, and we as people are just vessels for the conveyance of genes. It’s the same with ideas or “memes”. We are the vessels that hold and communicate ideas, and now that pool of ideas percolates on a global basis more rapidly than ever before.

 

In the next 6 years, three billion minds will come online for the first time to join this global conversation (via inexpensive smart phones in the developing world). This rapid influx of three billion people to the global economy is unprecedented in human history, and so to, will the pace of idea-pairings and progress.

 

We live in interesting times, at the cusp of the frontiers of the unknown and breathtaking advances. But, it should always feel that way, engendering a perpetual sense of future shock.

The Wulingyuan peak forest landform in Zhangjiajie represents a unique geomorphic and physicogeographical feature. The peak forest was developed in Devonian Taiyunguan and Huangjiadeng formations, with a distribution area of 86km2. It is a world-rare and unique landform formed in a special tectonic position and under particular conditions of neotectonism and exogenous processes. More than 3,000 rock peaks aloft within the area, of which 1,000 peaks exceed 200m in height, and Jinbianyan exceeds even 350m. The individual geometry includes mesa, platform, peak wall, peak cluster, peak forest, crosscut, stone door, natural bridge and valley, etc. The geopark is centralized by its sandstone peak forest unparalleled in the world, lined with karst landscape, and has many geological heritages such as shaped geological sections, special fossil relic. These constitute a geomorphic assembly of sandstone peak forest with particular characteristics

 

Taken @ZhangJiaJie, China

Il Latemar è uno dei gruppi montuosi delle Dolomiti.

Le Dolomiti prendono il nome dal naturalista francese Déodat de Dolomieu (1750-1801) che per primo studiò il particolare tipo di roccia predominante nella regione, carbonato doppio di calcio e magnesio (MgCa(CO3)2), battezzata in suo onore "dolomia".

Da questa particolare conformazione chimica deriva il caratteristico colore cangiante:

grigio chiaro al mattino; beige di giorno; rosso al tramonto; indaco al crepuscolo. Vengono anche chiamate "i Monti Pallidi".

La genesi di questo tipo di roccia carbonatica inizia attraverso accumuli di conchiglie, coralli e alghe calcaree e in ambiente marino e tropicale (simile all'attuale barriera corallina delle Bahamas, e dell'Australia orientale), i quali ebbero luogo nel Triassico, circa 250 milioni di anni fa, in zone con latitudine e longitudine molto diverse dall'attuale locazione delle Dolomiti, dove esistevano mari caldi e poco profondi. Sul fondo di questi mari si accumularono centinaia di metri di sedimento che, sotto il loro stesso peso e perdendo i fluidi interni, si trasformarono in roccia. Successivamente, lo scontro tra la placca europea e la placca africana (orogenesi alpina) fece emergere queste rocce innalzandole oltre 3000 m sopra il livello del mare.

Il paesaggio attuale, spigoloso e ricco di dislivelli, appare come un crogiuolo disordinato di rocce che nulla ha a che fare con le barriere coralline. A determinare tale trasformazione sono stati i piegamenti e le rotture delle rocce lungo piani di scorrimento (faglie), ai cui movimenti corrispondono altrettanti terremoti; episodiche esplosioni vulcaniche e relativi depositi; erosioni differenziali legate agli agenti atmosferici e ai piani di debolezza insiti nelle rocce.

L'innalzamento delle rocce dolomitiche è tutt’ora in corso. Oggi le Dolomiti mostrano il biancore dei carbonati di scogliera corallina, l'acutezza di rocce coinvolte in orogenesi recenti, le incisioni di potenti agenti esogeni (ghiacciai, vento, pioggia, freddo-caldo).

Nel futuro geologico, le Dolomiti continueranno a crescere inglobando nuovi settori di rocce sospinte dallo scontro tra le placche europea e africana (analogamente a quanto succede per la catena himalayana); la scomparsa di questa spinta determinerà il prevalere degli agenti esogeni tendenti ad appianare e addolcire il paesaggio montano (come è successo negli Urali).

(fonte: Wikipedia)

Latemar is one of the mountain ranges of the Dolomites.

The Dolomites are named after the French naturalist Deodat de Dolomieu (1750-1801) who first studied the particular rock type predominates in the region, double carbonate of calcium and magnesium (MgCa (CO3) 2), named in his honor "dolomite" ;.

Conformation derived from this particular chemical characteristic iridescent color:

light gray in the morning, day beige and red at sunset, indigo dusk. Are also called the "Pale Mountains".

The genesis of this type of carbonate rock accumulating through start of shells, corals and calcareous algae and in marine and tropical (similar to the present coral reefs of the Bahamas, and eastern Australia), which took place during the Triassic Period, about 250 million years ago, in areas very different from the latitude and longitude location of the Dolomites, where there were warm, shallow seas. The bottom of these seas piled hundreds of feet of sediment which, under their own weight and losing the internal fluids, were transformed into rock. Subsequently, the clash between the European plate and the African Plate (Alpine orogeny) brought out these rocks rise above 3000 m above sea level.

The current landscape, angular and full of gradients, looks like a messy melting pot of rock that has nothing to do with coral reefs. To determine this transformation have been bent and broken rocks along slip planes (faults), to which the motions are so many earthquakes, volcanic explosions episodic and related deposits; differential erosion related to weather and plans to inherent weakness in the rocks.

The elevation of dolomite rocks is still in progress. Today the Dolomites show the whiteness of carbonate reef, the sharpness of the rocks involved in recent orogeny, engravings of powerful exogenous agents (glaciers, wind, rain, cold / hot).

In the future geological, the Dolomites will continue to incorporate new areas of growth driven by the clash between the rocks, European and African plates (similar to what happens to the Himalayas), the disappearance of this pressure will determine the prevalence of exogenous agents that tend to smooth and soften the mountain (as has happened in the Urals).

(source: Wikipedia)

 

China Danxia is the name given in China to landscapes developed on continental red terrigenous sedimentary beds influenced by endogenous forces (including uplift) and exogenous forces (including weathering and erosion). The inscribed site comprises six areas found in the sub-tropical zone of south-west China. They are characterized by spectacular red cliffs and a range of erosional landforms, including dramatic natural pillars, towers, ravines, valleys and waterfalls. These rugged landscapes have helped to conserve sub-tropical broad-leaved evergreen forests, and host many species of flora and fauna, about 400 of which are considered rare or threatened.

 

Danxia Shan, China

August 22, 2010

 

UNESCO World Heritage Site # 1335

Year of Inscription: 2010

**

Although there are no specific reasons to become an alcoholic, many social, family, environmental, and genetic factors may contribute to its development.

 

Researchers have shown that the lack of endorphin is hereditary, and thus that there is a genetic predisposition to become addicted to alcohol. Beta-endorphin is a kind of "morphine" released by the brain in response to several situations, such as pain. In this way, beta-endorphins can be considered "endogenous analgesics" to numb or dull pains.

 

According to José Rico Irles, lecturer of Medicine of the UGR, and head of the research group, this low beta-endorphin level determines whether someone may become an alcoholic. When a subjects' brain with low beta-endorphin levels gets used to the presence of an exogenous surplus, then, when its own production stops, a dependence starts on the external source: alcohol. Source MedicalNewsToday.

  

The Wulingyuan peak forest landform in Zhangjiajie represents a unique geomorphic and physicogeographical feature. The peak forest was developed in Devonian Taiyunguan and Huangjiadeng formations, with a distribution area of 86km2. It is a world-rare and unique landform formed in a special tectonic position and under particular conditions of neotectonism and exogenous processes. More than 3,000 rock peaks aloft within the area, of which 1,000 peaks exceed 200m in height, and Jinbianyan exceeds even 350m. The individual geometry includes mesa, platform, peak wall, peak cluster, peak forest, crosscut, stone door, natural bridge and valley, etc. The geopark is centralized by its sandstone peak forest unparalleled in the world, lined with karst landscape, and has many geological heritages such as shaped geological sections, special fossil relic. These constitute a geomorphic assembly of sandstone peak forest with particular characteristics

 

Taken @ZhangJiaJie, China

To the entrepreneurs wondering if this is a good time to start a company — consider the recession a good omen.

 

The supermajority of U.S. business giants were founded during an economic recession.

 

Why might this be?

 

1) To build a business for the long term, it’s better to focus on iterating with customers than racing to please some capital provider pushing for hyper-growth.

 

2) Meaningful change depends on disruption. With stability comes stasis, and the big just get bigger. Market disruption is needed for new entrants and new ideas to have a chance. It is an essential pre-cursor for progress. What better time to disrupt an incumbent that when they are distracted with broad market disruption? For example, Tesla launched in the peak of the Great Recession of 2008. What better time to compete with the incumbent gas-burning car companies a when they are going bankrupt and selling off assets?

 

3) It takes a dedicated founder to start a business when the sentiment is sour, in contrast to the arbitrage-seeking opportunists in boom times.

 

4) It's easier to build a team with less competition for talent.

 

5) And keep in mind that the pace of innovation continues unabated through economic cycles (e.g. humanity's capacity to compute). The recombination of ideas is not only exogenous to the economy, it is the fountainhead of economic growth.

 

I spoke with the NBER last year about the economics of AI. This is the group that declares the official start and end of recessions. Someone took notes.

 

Leucospis sinensis female on Eryngium campestre.

 

A species coming from South-East Asia.

1st french observation ?

 

More info in album header.

 

Many thanks to Marco Selis for id.

Hormonal sentience, first described by Robert A. Freitas Jr., describes the information processing rate in plants, which are mostly based on hormones instead of neurons like in all major animals (except sponges). Plants can to some degree communicate with each other and there are even examples of one-way-communication with animals.

 

Acacia trees produce tannin to defend themselves when they are grazed upon by animals. The airborne scent of the tannin is picked up by other acacia trees, which then start to produce tannin themselves as a protection from the nearby animals. When attacked by caterpillars, some plants can release chemical signals to attract parasitic wasps that attack the caterpillars.

A similar phenomenon can be found not only between plants and animals, but also between fungus and animals. There exists some sort of communication between a fungus garden and workers of the leaf-cutting ant Atta sexdens rubropilosa. If the garden is fed with plants that are poisonous for the fungus, it signals this to the ants, which then will avoid fertilizing the fungus garden with any more of the poisonous plant.The Venus flytrap, during a 1- to 20-second sensitivity interval, counts two stimuli before snapping shut on its insect prey, a processing peak of 1 bit/s. Mass is 10-100 grams, so the flytrap's SQ is about +1. Plants generally take hours to respond to stimuli though, so vegetative SQs (Sentience Quotient) tend to cluster around -2.In theory even an organism with a hormonal system instead of a nervous system could be intelligent in some degree, but it would be an extremely slow brain, to say the least.And yet, at least higher plants are able to produce electrical signals, even if they do not use them in the same way animals do. František Baluška from the University of Bonn in Germany is one of the authorities on plant neurobiology.

en.wikipedia.org/wiki/Hormonal_sentience

 

Plants do not have a brain or neuronal network, but reactions within signalling pathways may provide a biochemical basis for learning and memory in addition to computation and problem solving.Controversially, the brain is used as a metaphor in plant intelligence to provide an integrated view of signalling.Plants respond to environmental stimuli by movement and changes in morphology. They communicate while actively competing for resources. In addition, plants accurately compute their circumstances, use sophisticated cost–benefit analysis and take tightly controlled actions to mitigate and control diverse environmental stressors. Plants are also capable of discriminating positive and negative experiences and of "learning" (registering memories) from their past experiences. Plants use this information to update their behaviour in order to survive present and future challenges of their environment.Plant physiology studies the role of signalling, communication, and behaviour to integrate data obtained at the genetic, molecular, biochemical, and cellular levels with the physiology, development, and behaviour of individual organisms, plant ecosystems, and evolution. The neurobiological view sees plants as information-processing organisms with rather complex processes of communication occurring throughout the individual plant organism. It studies how environmental information is gathered, processed, integrated and shared (sensory plant biology) to enable these adaptive and coordinated responses (plant behaviour); and how sensory perceptions and behavioural events are 'remembered' in order to allow predictions of future activities upon the basis of past experiences. Plants, it is claimed by some plant physiologists, are as sophisticated in behaviour as animals but this sophistication has been masked by the time scales of plants' response to stimuli, many orders of magnitude slower than animals'.It has been argued that although plants are capable of adaptation, it should not be called intelligence, as plant neurobiologists are relying primarily on metaphors and analogies to argue that complex responses in plants can only be produced by intelligence.[32]"A bacterium can monitor its environment and instigate developmental processes appropriate to the prevailing circumstances, but is that intelligence? Such simple adaptation behaviour might be bacterial intelligence but is clearly not animal intelligence." However, plant intelligence fits a definition of intelligence proposed by David Stenhouse in a book about evolution and animal intelligence where he described it as "adaptively variable behaviour during the lifetime of the individual".Critics of the concept have also argued that a plant cannot have goals once it is past the development stage of plantlet because, as a modular organism, each module seeks its own survival goals and the resultant whole organism behavior is not centrally controlled.[33] This view, however, necessarily accommodates the possibility that a tree is a collection of individually intelligent modules cooperating with, competing with and influencing each other, thus determining organism level behavior from the base up. The development into a larger organism whose modules must deal with different environmental conditions and challenges is not universal across plant species either, as smaller organisms might be subject to the same conditions across their bodies, at least, when the below and above ground parts are considered separately. Moreover, the claim that central control of development is completely absent from plants is readily falsified by apical dominance.Charles Darwin studied the movement of plants and in 1880 published a book The Power of Movement in Plants. In the book he concludes:It is hardly an exaggeration to say that the tip of the radicle thus endowed [..] acts like the brain of one of the lower animals; the brain being situated within the anterior end of the body, receiving impressions from the sense-organs, and directing the several movements.In philosophy, there are few studies of the implications of plant perception. Michael Marder put forth a phenomenology of plant life based on the physiology of plant perception.Paco Calvo Garzon offers a philosophical take on plant perception based on the cognitive sciences and the computational modeling of consciousness.Comparison to neurobiology:.A plant's sensory and response system has been compared to the neurobiological processes of animals. Plant neurobiology, an unfamiliar misnomer, concerns mostly the sensory adaptive behaviour of plants and plant electrophysiology. Indian scientist J. C. Bose is credited as the first person to research and talk about neurobiology of plants. Many plant scientists and neuroscientists, however, view this as inaccurate, because plants do not have neurons.The ideas behind plant neurobiology were criticised in a 2007 article published in Trends in Plant Science by Amedeo Alpi and other scientists, including such eminent plant biologists as Gerd Jürgens, Ben Scheres, and Chris Sommerville. The breadth of fields of plant science represented by these researchers reflects the fact that the vast majority of the plant science research community reject plant neurobiology. Their main arguments are that:"Plant neurobiology does not add to our understanding of plant physiology, plant cell biology or signaling".

"There is no evidence for structures such as neurons, synapses or a brain in plants".The common occurrence of plasmodesmata in plants which "poses a problem for signaling from an electrophysiological point of view" since extensive electrical coupling would preclude the need for any cell-to-cell transport of a ‘neurotransmitter-like’ compounds.The authors call for an end to "superficial analogies and questionable extrapolations" if the concept of "plant neurobiology" is to benefit the research community.There were several responses to the criticism clarifying that the term "plant neurobiology" is a metaphor and metaphors have proved useful on several previous occasions.[37][38] Plant ecophysiology describes this phenomenon.Parallels in other taxa. As described above in the case of a plant, similar mechanisms exist in a bacterial cell, a choanoflagellate, a fungal hypha, or a sponge, among the many other examples. All of these individual organisms of the respective taxa, despite being devoid of a brain or nervous system, are capable of sensing their immediate and momentary environment and responding accordingly. In the case of single-celled life, the sensory pathways are even more primitive in the sense that they take place on the surface of a single cell, as opposed to a network of many cells.

en.wikipedia.org/wiki/Plant_perception_(physiology)

  

Recent surprising similarities between plant cells and neuronsPlant cells and neurons share several similarities, including non-centrosomal microtubules, motile post-Golgi organelles, separated both spatially/structurally and functionally from the Golgi apparatus and involved in vesicular endocytic recycling, as well as cell-cell adhesion domains based on the actin/myosin cytoskeleton which serve for cell-cell communication. Tip-growing plant cells such as root hairs and pollen tubes also resemble neurons extending their axons. Recently, surprising discoveries have been made with respect to the molecular basis of neurodegenerative disorders known as Hereditary Spastic Paraplegias and tip-growth of root hairs. All these advances are briefly discussed in the context of other similarities between plant cells and neurons.There are very prominent similarities between tip-growing plant cells and the extending axons of neurons. However, recent advances reveal that these visible similarities stretch beyond the tip-growing plant cells and include plant tissue cells generating action potentials3 and accomplishing vesicle trafficking and recycling, typically at actin/myosin enriched cell-cell adhesion domains resembling neuronal synapses. Moreover, plant cells and neurons are similar from the cellular perspective, when most of their microtubules and Golgi apparatus organelles are not associated with the perinuclear centrosomes.In plant cells, Golgi stacks and Trans-Golgi Networks (TGNs) are motile organelles extending through the whole plant cells. Similarly in neurons centrosome-independent cortical microtubules are abundant in axons. They transport, among other cargo, so-called Golgi Outposts—which correspond to the TGNs of plant cells toward neuronal synapses. In both plant cells and neurons, TGNs act as independent organelles separated both spatially/structurally and functionally from the Golgi apparatus.Intriguingly, similarly as in neurons, also the TGN of plant cells is the inherent part of the endosomal/vesicular recycling pathways, supporting the dynamic and communicative nature of plant synapses.Plant action potentials (electric spikes) run in an axial direction, along the longitudinal axis of any plant organ, and the highest spike activity was scored in the transition zone of the root apex in maize.Hereditary spastic paraplegia (HSP) represents a heterogeneous group of genetic neurodegenerative disorders affecting the longest neurons of the human body, extending from the brain along the spinal cord /down to the legs.21 In the HSP disorders, axons of these long neurons degenerate causing problems in controlling leg muscles. One of the major genes in which mutation results in the HSP is Atlastin. Recent study has reported that Atlastin is homologous to the RHD3 protein of Arabidopsis.RHD3 protein is essential for proper growth and development of root hairs in Arabidopsis.Moreover, RHD3 is also important for the proper arrangement of root cell files which underlies the direction of root growth.In order to maintain their ordered cell files, root apex cross-walls (plant root synapses) perform active vesicle recycling. Both Arabidopsis RHD3 and Drosophila Atlastin are important for shaping tubular ER networks.RHD3 is also known to be required for the proper arrangement of the actin cytoskeleton and cell wall maintenance via vesicle trafficking.Moreover, similarly as Atlastin in neurons,RHD3 is important for the GA morphogenesis in plant cells too Importantly, both RHD3 and Atlastin are implicated in membrane tubulation and vesiculation whereas rhd3 mutant line emerges to be less active in endocytic internalization of FM endocytic tracer.Drosophila Atlastin regulates the stability of muscle microtubules and is required for both the axonal maintenance and synapse development. All this suggest that Arabidopsis emerges as an attractive and useful model object for investigations of mechanisms underlying HSP disorders in humans.Glutamate is one of the best understood and the most widespread excitatory .neurotransmitter which is perceived via glutamate receptors at brain synapses in animals and humans. These neuronal receptors have, in fact, deep evolutionary origin in prokaryotic bacteria, and are present also in plants., Importantly, the plant glutamate receptors have all the features of neuronal ones, and glutamate induces plant action potentials., All this strongly suggest that glutamate serves in neurotransmitter-like cell-cell communication in plants too. Interestingly in this respect, especially the root apices are target of the neuronal-like activity of glutamate in plants, with effects on cell development, root growth, morphogenesis, and behavior. The transition zone cells, localized between the apical meristem and basal cell elongation zone, respond to glutamate with rapid depolarization of the plasma membrane and this response is blocked by a specific antagonist of ionotropic glutamate receptors, 2-amino-5-phosphonopentanoate.Cells of the transition zone, also known as the distal elongation zone or the basal meristem, are crucial for root primordia priming,and exogenous glutamate is known to decrease primary root growth and increase lateral root proliferation.Beta-N-methylamino-L-alanine (BMAA) is a neurotoxic amino acid, derived from cycads, which is well-known to act as agonists and antagonists of mammalian glutamate receptors. BMAA inhibits root growth, cotyledon opening, and it stimulates elongation of light-grown hypocotyls in Arabidopsis.BMAA affects growth of Arabidopsis organs at very low concentrations, and these BMAA-induced effects are reversed by the addition of glutamate.This is consistent with a scenario wherein BMAA acts to block plant-specific glutamate receptors.Similarly to glutamate, aluminium also induces very rapid plasma membrane depolarization specifically in cells of the root apex transition zone. Moreover, glutamate and aluminium both induce rapid and strong calcium spikes with unique signatures in cells of the transition zone.These root cells represent the primary target for the aluminium toxicity in plants, whereas aluminium is not toxic to root cells which have already entered the rapid elongation region.Similarly, although aluminium is not so toxic in most plant cells, neuronal-like tip-growing root hairs and pollen tubes1,2 are sensitive to aluminium similarly as are the transition zone cells. In these latter cells, aluminium is specifically internalized via endocytosis. Internalized endocytic aluminium interferes with vesicle trafficking/recycling and endocytosis, inhibiting the PIN2-driven basipetal auxin transport in the transition zone of root apices.Aluminium targets specifically the auxinsecreting plant synapses and affects the polar auxin-transport-based root cell patterning. Moreover, aluminium affects also nitric oxide (NO) production which is highest in cells of the the distal portion of the transition zone. Importantly, the rapidly elongating root cells are not sensitive towards aluminium and neither is there internalization of aluminium into rapidly elongating root cells. In support of the endocytosis of aluminium being the primary process linked to the aluminium toxicity in root cells, endocytosis of aluminium and its toxicity is lowered in the Arabidopsis mutant over-expressing the DnaJ domain protein auxillin which regulates the clathrin-based endocytosis.In animals and humans, neuronal cells are extremely sensitive towards aluminium which is internalized via endocytosis specifically in these cells. Aluminium was found to be enriched in lysosomes, similarly like Alzheimer’s amyloid β-peptide plaque depositions. These are also internalized from cell surface and aluminium was reported to inhibit their degradation.In conclusion, in both transition zone root cells and neurons, endocytosis of aluminium emerges as relevant to its high biotoxicity. In plants, the aluminium toxicity is the most important limiting factor for crop production in acid soil environments worldwide. Further studies on these cells might give us crucial clues not only for plant biology and agriculture but also for our still limited understanding of the Alzheimer disease. In line with the original proposal of Charles and Francis Darwin, root apices of plants represent neuronal/anterior pole of plant bodies

www.ncbi.nlm.nih.gov/pmc/articles/PMC2884105/

Astro Teller, grandson of the hydrogen bomb and Moonshot maven, introducing me at Google. The video of my talk just went up.

---------------

ABSTRACT

 

Many of the interesting challenges in computer science, nanotechnology, and synthetic biology entail the construction of complex systems. As these systems transcend human comprehension, will we continue to design them or will we increasingly evolve them? As we design for evolvability, the locus of learning shifts from the artifacts themselves to the process that created them. There is no mathematical shortcut for the decomposition of a neural network or genetic program, no way to "reverse evolve" with the ease that we can reverse engineer the artifacts of purposeful design. The beauty of compounding iterative algorithms (evolution, fractals, organic growth, art) derives from their irreducibility.

 

Google itself is a complex system that seeks to perpetually innovate. Leadership in complex organizations shifts from direction setting to a wisdom of crowds. The role of upper management is to tune the parameters of communication. Leaders can embrace a process that promotes innovation with emergent predictability more than they can hope to dictate the product of innovation itself.

 

Innovation is critical to economic growth, progress, and the fate of the planet, yet it seems so random. While innovation may appear inscrutable at the atomic level, patterns emerge in the aggregate nonetheless. A critical pattern, spanning centuries, is that the pace of innovation is perpetually accelerating, and it is exogenous to the economy. Rather, it is the combinatorial explosion of possible innovation-pairings that creates economic growth.

---------------

(more on the dichotomy of design and evolutionary search, organizational optimization, and innovation)

 

I arranged the talk to overlap with a SFI brain spa @ Google. Some quotes from that event (without attribution per Chatham House rule):

 

“Unlimited power limits intellectual parsimony.”

 

“With machine learning, we are creating electronic savants. They are happy in a high-dimensional space. They have no desire to reduce. What we want is electronic Keplers that can recognize the ellipse, not savants that can force fit a heliocentric model.”

 

“The target of evolution can’t be more complex than the selection pressure itself. If you can come up with the selection pressure, you might as well design it.”

 

“I don’t think there is any natural process that is incompressible. It’s not random.”

 

[I disagree with the premise of those last two quotes]

Helosis ruficeps (Ridl.) R.K. Eberwein

 

In Oct 2007, a group of bird watchers came accross this plants in Penang Island and one of them, Kayev Choong, took a photograph and GPS reading and marked it on the map. A month later, He sent the photo to his friends Peggy Tan, Alastair Bishop, and Hooi Peng Kwan, asking for the name of this plant, thinking that this is probably a ginger (it was indeed growing next to the ginger plant). Hooi and Peggy Tan then seek help from another friend, Dr Chan Ah Lak of Taiping whom was similarly clueless on the identity of the plant and forwarded the photo to me in Universiti Kebangsaan Malaysia for the ID. Unfortunately, the email on 20 Nov 2007 was sent to my Yahoo account, the seldom open junk filled old address. It was not until in April 2008 that I discovered and read the email, found by accident when I went looking for archives.

 

I decided to reply to Dr Chan Ah Lak on 7 May 2008 asking for more information on the plants that I thought was an unknown and strange Balanophora of Gerik, Perak. Dr Chan promptly replied and told me that he has to trace it back the owner of the photograph. Nearly a month later, he wrote back with detail information not only on the owner (Kayev Choong) but forwarded us a map on the locality and the GPS reading of the site in Penang Hill.

 

At the end of oral examination of Ng Suan Beng, one of my final year students who was working on the Balanophora of Cameron Highlands, I showed him the photograph of "Balanophora from Gerik" and commented that it was not Balanophora. He later confirmed that I was probably of Exorhopala Steen., a genus related to Balanophora based on illustration in Bertel Hansen's paper on Balanophoraceae in the Flora Malesiana.

 

Data minning then started at UKMB and soon it was discovered that the monotypic Exorhopala ruficeps (Ridley) Steen. was originally described as Rhopalocnemis ruficeps by H.N. Ridley based on the collection from Bukit Penara, Penang with notes that it is also to be found in Taiping's Maxwell Hill. The sspecies was later transfered in 1931 to a new genus, named Exorhopala by the late C.G.G.J. Van Steenis on the basis of the exogenous origin of its inflorescences.

 

In August 1986, Anton Weber came to Penang and photograph the plant (photos here) for the first time in the original locality and collected a specimen which later studied by Roland K. Eberwein in Vienna. They concluded that this rare root endo-parasite of Malaya is actually belong to South American Helosis, a genus then known only to occur in Mexico, Ecuador, Peru, Costa Rica and Belize. This was based on the fact that the inflorescences of this plant originate endogenously (as in all other Balanophoraceae) with "no volva and the tuber-tissue covering the emerging inflorescence crumbles into pieces" and the inflorescence and flower characters are "neither in full accordance with Rhopalocnemis nor do they justify a genus of its own (Exorhopala)". The species then was transfered to Helosis, which thus the genus becomes transpacific and no longer restricted to Latin America.

 

Our RRMT was despatch and finally managed to locate and inspect the area and came out witn a fisrt full set of photograph in 13 Aug 2008 and recently returned to site witn better equipment (but still without me who could not make it in both occasion due to severe back-pain). They kindly took home some specimen and I managed to photograph it in the lab.

 

Presented here is the set of photos taken from Penang. Slide and follow the stream

E-cigarettes use e-liquid or 'vape juice' of variable composition. Most of the e-liquid is composed of propylene glycol, and glycerin, with a small amount of nicotine, flavorings, additives, and differing amounts of contaminants. Some also contain CBD/cannabis.

In this example there are intraalveolar fibrin, reactive hyperplasia of type 2 pneumocytes, as well as foamy macrophages in the airspaces along with similar-appearing vacuolated hyperplastic type 2 pneumocytes.

Interestingly, the vacuolated cells resemble the changes that are characteristic of toxic reactions to medications including amiodarone or noxious chemical fumes which may suggest a similar mechanism of injury. This suggests that vaping-associated lung injury represents an airway-centered chemical pneumonitis that is potentially induced by the inhaled toxic substances in the aerosolized material produced by the e-cigarette.

Recognized features of acute lung injury include;

- acute fibrinous pneumonitis

- diffuse alveolar damage

- organizing pneumonia

- interstitial edema

- intraalveolar fibrin

- reactive type 2 pneumocyte hyperplasia

- DAD with hyaline membranes in some cases.

 

Images contributed by Dr. Matthew Cecchini - @Path_Matt

 

HUE ZITADELLE

The Imperial City (Vietnamese: Hoàng thành; Hán tự: 皇城) is a walled enclosure within the citadel (Kinh thành; 京城) of the city of Huế, the former imperial capital of Vietnam.

 

HISTORY

In June 1802 Nguyễn Ánh ascended the throne of a unified Vietnam and proclaimed himself Emperor Gia Long with Hue, the ancestral seat of the Nguyễn Lords as the capital. Geomancers were consulted as to the propitious location site for the new city and construction began in 1804. Thousands of workers were ordered to build the walled citadel and ringing moat, measuring some 10 kilometres long. The original earthwork was later reinforced and faced with brick and stone resulting in 2 m-thick ramparts.

 

The citadel was oriented to face the Huong River (Perfume River) to the southeast. This differs from Beijing's Forbidden City in which faces true south. Rather than concentric rings centered on the Emperor's palace, the imperial residence itself is offset toward the southeast side of the citadel, nearer the river. A second set of tall walls and a second moat was constructed around this Imperial City, within which many edifices were added in a series of gated courtyards, gardens, pavilions and palaces. The entire complex was the seat of power until the imposition of the French protectorate in the 1880s. Thereafter it existed mostly to carry on symbolic traditions until the Nguyễn dynasty was ousted in 1945, with the Proclamation of Independence of the Democratic Republic of Vietnam. At the time, the Purple Forbidden City had many buildings and hundreds of rooms. Once vacated it suffered from neglect, termite ravages, and inclement weather including a number of cyclones. Nonetheless the Imperial City was an impressive sight. Most destructive were man-made crises as evidenced in the bullet holes still visible from the military conflicts of the 20th century.

 

Major losses occurred in 1947 when the Việt Minh seized the Citadel in February. The French led counter-attack laid siege and the six-week ensuing battle destroyed many of the major structures. The core of the city including the Imperial Palace was burned.

 

The Citadel came under fire again in the early morning hours of January 31, 1968, as part of the Tet Offensive a Division-sized force of People's Army of Vietnam and Viet Cong soldiers launched a coordinated attack on Huế seizing most of the city. During the initial phases of the Battle of Huế, due to Huế's religious and cultural status, U.S. troops were ordered not to bomb or shell the city, for fear of destroying the historic structures; but as casualties mounted in house-to-house fighting these restrictions were progressively lifted and the fighting caused substantial damage to the Imperial City. Viet Cong troops occupied some portions of the citadel while South Vietnamese troops occupied others; and allied warplanes targeted the anti-aircraft guns the communists has mounted on the citadel's outer towers Out of 160 buildings only 10 major sites remain because of the battle, such as the Thái Hòa and Cần Thanh temples, Thế Miếu, and Hiển Lâm Các. The city was made a UNESCO site in 1993. The buildings that still remain are being restored and preserved. The latest, and so far largest, restoration project is planned to conclude in 2015.

 

LAYOUT

The grounds of the Imperial City are protected by fortified ramparts 2 by 2 kilometres, and ringed by a moat. The water in the moat is routed from the Perfume River through a series of sluice gates. This enclosure is the citadel (Kinh thành).

 

Inside the citadel is the Imperial City (Hoàng thành; 皇城), with a perimeter wall some 2.5 kilometres in length.

 

Within the Imperial City is the Purple Forbidden City (Tử cấm thành; 紫禁城), a term identical to the Forbidden City in Beijing. Access to the innermost enclosure was restricted to the imperial family.

_______________________________________

 

HALONG BAY

Hạ Long Bay or Halong Bay (Vietnamese: Vịnh Hạ Long, IPA: [vînˀ hâːˀ lawŋm] (About this soundlisten)) is a UNESCO World Heritage Site and popular travel destination in Quảng Ninh Province, Vietnam. The name Hạ Long means "descending dragon". Administratively, the bay belongs to Hạ Long city, Cẩm Phả city, and is a part of Vân Đồn District. The bay features thousands of limestone karsts and isles in various shapes and sizes. Ha Long Bay is a center of a larger zone which includes Bai Tu Long Bay to the northeast, and Cát Bà Island to the southwest. These larger zones share a similar geological, geographical, geomorphological, climate, and cultural characters.

 

Hạ Long Bay has an area of around 1,553 km2 (600 sq mi), including 1,960–2,000 islets, most of which are limestone. The core of the bay has an area of 334 km2 with a high density of 775 islets. The limestone in this bay has gone through 500 million years of formation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years under the impact of the tropical wet climate. The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. Hạ Long Bay is home to 14 endemic floral species and 60 endemic faunal species.

 

Historical research surveys have shown the presence of prehistoric human beings in this area tens of thousands years ago. The successive ancient cultures are the Soi Nhu culture around 18,000–7000 BC, the Cai Beo culture 7000–5000 BC and the Hạ Long culture 5,000–3,500 years ago. Hạ Long Bay also marked important events in the history of Vietnam with many artifacts found in Bai Tho Mountain, Dau Go Cave, Bai Chay.

 

500 years ago, Nguyễn Trãi praised the beauty of Ha Long Bay in his verse Lộ nhập Vân Đồn, in which he called it "rock wonder in the sky". In 1962, the Ministry of Culture, Sports and Tourism of North Vietnam listed Ha Long Bay in the National Relics and Landscapes publication. In 1994, the core zone of Ha Long Bay was listed as a World Heritage Site according to Criterion VII, and listed for a second time according to Criterion VIII.

 

ETYMOLOGY

The name Hạ Long (chữ Hán: 下龍) means "descending dragon".

 

Before the 19th century, the name Hạ Long Bay had not been recorded in the old books of the country. It has been called An Bang, Lục Thủy, Vân Đồn ... In the late 19th century, the name Hạ Long Bay appeared on the Maritime Map of France. The French-language Hai Phong News reported "Dragon appears on Hạ Long Bay".

 

According to local legend, when Vietnam had just started to develop into a country, they had to fight against invaders. To assist the Vietnamese in defending their country, the gods sent a family of dragons as protectors. This family of dragons began spitting out jewels and jade. These jewels turned into the islands and islets dotting the bay, linking together to form a great wall against the invaders. Under magics, numerous rock mountains abruptly appeared on the sea, ahead of invaders' ships; the forward ships struck the rocks and each other. After winning the battle, the dragons were interested in peaceful sightseeing of the Earth, and then decided to live in this bay. The place where the mother dragon descended was named Ha Long, the place where the dragon's children attended upon their mother was called Bái Tử Long island (Bái: attend upon, Tử: children, Long: dragon), and the place where the dragon's children wriggled their tails violently was called Bạch Long Vĩ island (Bạch: white-color of the foam made when Dragon's children wriggled, Long: dragon, Vĩ: tail), present-day Tra Co peninsula, Móng Cái.

 

OVERVIEW

The bay consists of a dense cluster of some 1,600 limestone monolithic islands each topped with thick jungle vegetation, rising spectacularly from the ocean. Several of the islands are hollow, with enormous caves. Hang Dau Go (Wooden Stakes cave) is the largest grotto in the Ha Long area. French tourists visited in the late 19th century, and named the cave Grotte des Merveilles. Its three large chambers contain large numerous stalactites and stalagmites (as well as 19th-century French graffiti). There are two bigger islands, Tuần Châu and Cát Bà, that have permanent inhabitants, as well as tourist facilities including hotels and beaches. There are a number of beautiful beaches on the smaller islands. A community of around 1,600 people live on Hạ Long Bay in four fishing villages: Cua Van, Ba Hang, Cong Tau and Vong Vieng in Hung Thang ward, Ha Long city. They live on floating houses and are sustained through fishing and marine aquaculture (cultivating marine biota), plying the shallow waters for 200 species of fish and 450 different kinds of mollusks. Many of the islands have acquired their names as a result of interpretation of their unusual shapes. Such names include Voi Islet (elephant), Ga Choi Islet (fighting cock), Khi Islet (monkey), and Mai Nha Islet (roof). 989 of the islands have been given names. Birds and animals including bantams, antelopes, monkeys, and lizard also live on some of the islands.

 

Almost all these islands are as individual towers in a classic fenglin landscape with heights from 50–100 metres (160–330 ft), and height/width ratios of up to about six.

 

Another specific feature of Hạ Long Bay is the abundance of lakes inside the limestone islands. For example, Dau Be island has six enclosed lakes. All these island lakes occupy drowned dolines within fengcong karst.

 

LOCATION

Hạ Long Bay is located in northeastern Vietnam, from E106°55' to E107°37' and from N20°43' to N21°09'. The bay stretches from Quang Yen town, past Hạ Long city, Cẩm Phả city to Vân Đồn District, is bordered on the south and southeast by Lan Ha Bay, on the north by Hạ Long city, and on the west by Bai Tu Long Bay. The bay has a 120-kilometre-long coastline and is approximately 1,553 km2 in size with about 2,000 islets. The area designated by UNESCO as the World Natural Heritage Site incorporates 434 km2 with 775 islets, of which the core zone is delimited by 69 points: Dau Go island on the west, Ba Ham lake on the south and Cong Tay island on the east. The protected area is from the Cái Dăm petrol store to Quang Hanh ward, Cẩm Phả city and the surrounding zone.

 

CLIMATE

The climate of the bay is tropical, wet, sea islands, with two seasons: hot and moist summer, dry and cold winter. The average temperature is from 15–25 °C, and annual rainfall is between 2 and 2.2 metres. Ha Long Bay has the typical diurnal tide system (tide amplitude ranges from 3.5–4 metres. The salinity is from 31 to 34.5MT in the dry season and lower in the rainy season.

 

POPULATION

Of the 1,969 islands in Ha Long, only approximately 40 are inhabited. These islands range from tens to thousands of hectares in size, mainly in the East and Southeast of Hạ Long Bay. In recent decades, thousands of villagers have been starting to settle down on the pristine islands and build new communities such as Sa Tô Island (Hạ Long City), Thắng Lợi Island (Vân Đồn district).

 

The population of Hạ Long Bay is about 1,540, mainly in Cửa Vạn, Ba Hang and Cặp Dè fishing villages (Hùng Thắng Ward, Hạ Long City). Residents of the bay mostly live on boats and rafts buoyed by tires and plastic jugs to facilitate the fishing, cultivating and breeding of aquatic and marine species. Fish require feeding every other day for up to three years, when they are eventually sold to local seafood restaurants for up to 300,000 Vietnamese dong per kilogram. Today the life of Hạ Long Bay inhabitants has much improved due to new travel businesses. Residents of the floating villages around the Ha Long bay now offer bedrooms for rent, boat tours, and fresh seafood meals to tourists. While this is an isolating, back-breaking lifestyle, floating village residents are considered wealthy to residents of other Hạ Long Bay islands.

 

At present ((clarify)), the Quảng Ninh provincial government has a policy to relocate the households living in the bay to resettle, in order to stabilize their life and to protect the landscape of the heritage zone. More than 300 households living in fishing villages in Hạ Long Bay have been relocated ashore in Khe Cá Resettlement Area, now known as Zone 8 (Hà Phong Ward, Hạ Long City) since May 2014. This project will continue to be implemented. The province will only retain a number of fishing villages for sightseeing tours.

 

HISTORY

SOI NHU CULTURE (16,000–5000 BC)

Located in Hạ Long and Bai Tu Long are archaeological sites such as Me Cung and Thien Long. There are remains from mounds of mountain shellfish (Cyclophorus), spring shellfish (Melania, also called Thiana), some fresh water mollusc and some rudimentary labour tools. The main way of life of Soi Nhu's inhabitants included catching fish and shellfish, collecting fruits and digging for bulbs and roots. Their living environment was a coastal area unlike other Vietnamese cultures, for example, like those found in Hoa Binh and Bac Son.

 

CAI BEO CULTURE (5000–3000 BC)

Located in Hạ Long and Cat Ba island, its inhabitants developed to the level of sea exploitation. Cai Beo culture is a link between Soi Nhu culture and Hạ Long culture

Hạ Long culture (2500–1500 BC)

 

CLASSICAL PERIOD

History shows that Hạ Long Bay was the setting for local naval battles against Vietnam's coastal neighbors. On three occasions, in the labyrinth of channels in Bạch Đằng River near the islands, the Vietnamese army stopped the Chinese from landing. In 1288, General stopped Mongol ships from sailing up the nearby Bach Dang River by placing steel-tipped wooden stakes at high tide, sinking the Mongol Kublai Khan's fleet.

 

MODERN PERIOD

Hạ Long Bay was the site of the first ever raising of the new national flag of the Provisional Central Government of Vietnam on 5 June 1948 during the signing of the Halong Bay Agreements (Accords de la baie d’Along) by High Commissioner Emile Bollaert and President Nguyễn Văn Xuân.

 

During the Vietnam War, many of the channels between the islands were heavily mined by the United States Navy, some of which pose a threat to shipping to this day.

 

GEOLOGY AND GEOMORPHOLOGY

In 2000, UNESCO's World Heritage Committee inscribed Hạ Long Bay in the World Heritage List according to its outstanding examples representing major stages of the Earth's history and its original limestone karstic geomorphologic features. Hạ Long Bay and its adjacent areas consist of a part of the Sino-Vietnamese composite terrane having its development history from pre-Cambrian up to present day. During Phanerozoic, terrigenous, volcanogenic and cherty-carbonate sediments containing in abundance graptolites, brachiopods, fishes, corals, foraminiferas, radiolarias, bivalves and flora, separated one from another by 10 stratigraphic gaps, but the boundary between Devonian and Carboniferous has been considered as continuous. The limestone karstic geomorphology of the bay was developed since Miocene, especially the cone-shaped hills (fengcong), or isolated high limestone karst towers (fenglin) with many remnants of old phreatic caves, old karstic foot caves, marine notch caves form magnificent limestone karst landforms as unique on the world. The Quaternary geology was developed through 5 cycles with the intercalation of marine and continental environments. The present Hạ Long Bay, in fact, appeared after the Middle Holocene maximum transgression, leaving ultimate zone of lateral undercutting in the limestone cliffs bearing many shells of oysters, having the 14C age as 2280 to >40,000 y. BP. Geological resources are abundant: anthracite, lignite, oil shale, petroleum, phosphate, limestone and cement additives, kaolin, silica sand, dolomite, quartzite of exogenous origin, and antimony, mercury of hydrothermal origin. Besides, there still are surface water, groundwater and thermal mineral water on the shore of the Hạ Long - Bái Tử Long Bays and other environmental resources.

 

In terms of marine geology, this area is recorded as an especially coastal sedimentary environment. In the alkaline seawater environment, the chemical denudation process of calcium carbonate proceeds rapidly, creating wide, strangely shaped marine notches.

 

The bottom surface sediments are various from clay mud to sand, however, silty mud and clay mud are dominated in distribution. Especially, the carbonate materials originated from organisms make up from 60 to 65% sedimentary content. The surface sediments of coral reefs are mainly sand and pebbles of which the carbonate materials occupy for more than 90%. The intertidal zone sediments are various from clay mud to sand and gravel depending to distinguished sedimentary environments such as mangrove marshes, tidal flats, beaches etc. At the small, but wonderfully beautiful beaches, the sand sediments may be dominated quartz or carbonate materials.

 

The sediment layers of intertidal zone, the upper sea bed with a plain surface conserving ancient rivers, systems of caves and its sediments, traces of ancient marine action forming distinctive notches, beaches and marine terraces, mangrove swamps are important evidence of geological events and processes taking place during Quaternary.

 

HISTORY OF TECTONICS

Hạ Long Bay has experienced at least 500 million years in various geological states of orogeny, marine transgression and marine regression. During the Ordovician and Silurian periods (500-410 million years ago), Hạ Long Bay was deep sea. During the Carboniferous and Permian periods (340-250 million years ago), Ha Long Bay was at shallow sea level.

 

The dominated uplift movement of neotectonic and recent tectonic influenced deeply on topography of this area, and the present landscape of sea-islands was formed around 7 or 8 thousand years ago by the sea invasion during Holocene transgression begun at about 17-18 thousand years ago. Particularly from the Holocene time, from about 11,000 years ago Cat Ba - Ha Long area has much archaeological evidence connecting variations in sea levels with the development of ancient cultures such as the Soi Nhu and Ha Long cultures.

 

KARST GEOMORPHOLOGY VALUE

Due to a simultaneous combination of ideal factors such as thick, pale, grey, and strong limestone layers, which are formed by fine-grained materials; hot and moist climate and slow tectonic process as a whole; Ha Long Bay has had a complete karst evolution for 20 million years. There are many types of karst topography in the bay, such as karst field.

 

Hạ Long Bay is a mature karst landscape developed during a warm, wet, tropical climate. The sequence of stages in the evolution of a karst landscape over a period of 20 million years requires a combination of several distinct elements including a massive thickness of limestone, a hot wet climate and slow overall tectonic up lift. The process of karst formation is divided into five stages, the second of which is the formation of the distinctive do line karst. This is followed by the development of fengcong karst, which can be seen in the groups of hills on Bo Hon and Dau Be Inland. These cones with sloping sides average 100m in height with the tallest exceeding 200m. Fenglin karst is characterised by steep separate towers. The hundreds of rocky islands with form the beautiful and famous landscape of the Bay are the individual towers of a classic Fenglin landscape where the intervening plains have been submerged by the sea. Most towers reach a height of between 50 and 100m with a height to width ratio of about 6. The karst dolines were flooded by the sea, becoming the abundance of lakes that lie within the limestone islands. For example, Dau Be island at the mouth of the Bay has six enclosed lakes including those of the Ba Ham lakes lying within its fengcong karst. The Bay contains examples of the landscape elements of fengcong, fenglin and karst plain. These are not separate evolutionary stages but the result of natural non – uniform processes in the denudation of a large mass of limestone. Marine erosion created the notches which in some places have been enlarged into caves. The marine notch is a feature of limestone coastline but, in Ha Long Bay, it has created the mature landscape.

 

Within Hạ Long Bay, the main accessible caves are the older passages that survive from the time when the karst was evolving though its various stages of fengcong and fenglin. Three main types of caves can be recognized in the limestone islands (Waltham, T. 1998):

 

Remnants of old phreatic caves

Old karstic foot caves

Marine notch caves

 

The first group consists of old phreatic caves which include Sung Sot, Tam Cung, Lau Dai, Thien Cung, Dau Go, Hoang Long, Thien Long. Nowadays, these caves lie at various high levels. Sung Sot cave is on Bo Hon island. From its truncated entrance chambers on a ledge high on the cliff, a passage of more that 10m high and wide descends to the south. Tam Cung is a large phreatic fissure cave that developed in the bedding planes of the limestone dividing the fissure cave into three chambers. Lau Dai is a cave with a complex of passages extending over 300m opening on the south side of Con Ngua island. Thien Cung and Dau Go are remnants of the same old cave system. They both survive in the northern part of Dau Go island at between 20 and 50m above sea level. Thien Cung has one large chamber more that 100m long, blocked at its ends and almost subdivided into smaller chambers by massive wall of stalactites and stalagmites. Dau Go is a single large tunnel descending along a major set of fractures to a massive choke.

 

The second group of caves is the old karstic foot caves which include Trinh Lu, Bo Nau, Tien Ong and Trong caves. Foot caves are a ubiquitous feature of karst landscapes which have reached a stage of widespread lateral undercutting at base level. They may extend back into maze caves of stream caves draining from larger cave systems within the limestone. They are distinguished by the main elements of their passages being close to the horizontal and are commonly related to denuded or accumulated terraces at the old base levels. Trinh Nu, which is one of the larger foot caves in Ha Long Bay with its ceiling at about 12m above sea level and about 80m in length, was developed in multiple stages. Bo Nau, a horizontal cave containing old stalactite deposits, cuts across the 25o dip of the bedding plane.

 

The third group is the marine notch caves that are a special feature of the karst of Hạ Long Bay. The dissolution process of sea water acting on the limestone and erosion by wave action crates notches at the base of the cliffs. In advantageous conditions, dissolution of the limestone allows the cliff notches to be steadily deepened and extended into caves. Many of these at sea level extend right though the limestone hills into drowned dolines which are now tidal lakes.

 

A distinguishing feature of marine notch caves is an absolutely smooth and horizontal ceiling cut through the limestone. Some marine notch caves had been not formed at present sea level, but old sea levels related to sea level changes in Holocene transgression, event to Pleistocene sea levels. Some of them passed preserved the development of old karstic foot cave in mainland environment or preserved the remnants of older phreatic caves. One of the most unusual features of Ha Long Bay is the Bo Ham lake group of hidden lakes and their connecting tunnel – notch caves in Dau Be island. From the island's perimeter cliff a cave, 10m wide at water level and curving so that it is almost completely dark, extends about 150m to Lake 1. Luon cave is on Bo Hon island and extends 50m though to an enclosed tidal lake. It has a massive stalactite hanging 2m down and truncated at the modern tidal level. It has passed through many stages in its formation.

 

The karst landscape of Hạ Long Bay is of international significance and of fundamental importance to the science of geomorphology. The fenglin tower karst, which is the type present in much of Ha Long Bay, is the most extreme form of limestone landscape development. If these karst landscapes are broadly compared in terms of their height, steepness and number of their limestone towers, Ha Long Bay is probably second in the entire world only to Yangshou, in China. However, Hạ Long Bay has also been invaded by the sea so that the geomorphology of its limestone islands are, at least in part, the consequence of marine erosion. The marine invasion distinguishes Ha Long Bay and makes it unique in the world. There are other areas of submerged karst towers which were invaded by the sea, but none is as extensive as Ha Long Bay.

 

TIMELINE OF GEOLOGIC EVOLUTION

Some of the most remarkable geological events in Hạ Long Bay's history have occurred in the last 1,000 years, include the advance of the sea, the raising of the bay area, strong erosion that has formed coral, and, pure blue and heavily salted water. This process of erosion by seawater has deeply engraved the stone, contributing to its fantastic beauty. Present-day Ha Long Bay is the result of this long process of geological evolution that has been influenced by so many factors.

 

Due to all these factors, tourists visiting Ha Long Bay are not only treated to one of the natural wonders of the world, but also to a precious geological museum that has been naturally preserved in the open air for the last 300 million years.

 

ECOLOGY

Hạ Long Bay is host to two ecosystems: a tropical, moist, evergreen rainforest ecosystem; and a marine and coastal ecosystem. The bay is home to seven endemic species: Livistona halongensis, Impatiens halongensis, Chirita halongensis, Chirita hiepii, Chirita modesta, Paraboea halongensis and Alpinia calcicola. Bioluminescent plankton can also be found.

 

The many islands that dot the bay are home to a great many other species, including (but likely not limited to): 477 magnoliales, 12 pteris, 20 salt marsh flora; and 4 amphibia, 10 reptilia, 40 aves, and 4 mammalia.

 

Common aquatic species found in the bay include: cuttlefish (mực); oyster (hào); cyclinae (ngán); prawns (penaeidea (tôm he), panulirus (tôm hùm), parapenaeopsis (tôm sắt), etc.); sipunculoideas (sá sùng); nerita (ốc đĩa); charonia tritonis (ốc tù và); and cà sáy.

 

ENVIRONMENTAL DAMAGE

With an increasing tourist trade, mangroves and seagrass beds have been cleared and jetties and wharves have been built for tourist boats.

 

Game fishing, often near coral reefs, is threatening many endangered species of fish.

 

Local government and businesses are aware of the problems and many measures have been taken to minimise the impact of tourism on the bay environment for sustainable economic growth like introducing eco-friendly tours and introducing tight waste control on resorts.

 

AWARDS AND DESIGNATIONS

In 1962, the Vietnam Ministry of Culture, Sport and Tourism designated Ha Long Bay a 'Renowned National Landscape Monument'.

 

Hạ Long Bay was first listed as a UNESCO World Heritage Site in 1994, in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognised Ha Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated.

 

In October 2011, World Monuments Fund included the bay on the 2012 World Monuments Watch, citing tourism pressures and associated development as threats to the site that must be addressed. The goal of Watch-listing is to promote strategies of responsible heritage-driven development for a sustainable future.

 

In 2012, New 7 Wonders Foundation officially named Ha Long Bay as one of New Seven Natural Wonders of the world.

 

Ha Long Bay is also a member of the Club of the Most Beautiful Bays of the World.

 

WIKIPEDIA

Hạ Long Bay (Vietnamese: Vịnh Hạ Long, About this sound listen, literally: "descending dragon bay") is a UNESCO World Heritage Site, and a popular travel destination, in Quảng Ninh Province, Vietnam. Administratively, the bay belongs to Hạ Long City, Cẩm Phả town, and the part of Vân Đồn District. The bay features thousands of limestone karsts and isles in various sizes and shapes. Hạ Long Bay is a center of a larger zone which includes Bái Tử Long bay to the northeast, and Cát Bà islands to the southwest. These larger zones share similar geological, geographical, geomorphological, climate, and cultural characters.

 

Hạ Long Bay has an area of around 1,553 km2, including 1,960–2,000 islets, most of which are limestone. The core of the bay has an area of 334 km2 with a high density of 775 islets. The limestone in this bay has gone through 500 million years of formation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years under the impact of the tropical wet climate. The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. Hạ Long Bay is home to 14 endemic floral species and 60 endemic faunal species.

 

Historical research surveys have shown the presence of prehistorical human beings in this area tens of thousands years ago. The successive ancient cultures are the Soi Nhụ culture around 18,000–7000 BC, the Cái Bèo culture 7000–5000 BC and the Hạ Long culture 5,000–3,500 years ago. Hạ Long Bay also marked important events in the history of Vietnam with many artifacts found in Bài Thơ Mount, Đầu Gỗ Cave, Bãi Cháy.

 

500 years ago, Nguyễn Trãi praised the beauty of Hạ Long Bay in his verse Lộ nhập Vân Đồn, in which he called it "rock wonder in the sky".[8] In 1962, the Ministry of Culture, Sports and Tourism of North Vietnam listed Hạ Long Bay in the National Relics and Landscapes publication. In 1994, the core zone of Hạ Long Bay was listed by UNESCO as a World Heritage Site according to criterion vii, and listed for a second time according to criterion viii.

 

ETYMOLOGY

The name Hạ Long is derived from the Sino-Vietnamese 下龍, meaning "descending dragon".

 

Before 19th century, the name Halong Bay had not been recorded in the old books of our country. It has been called An Bang, Luc Thuy, Van Don... Late 19th century, the name Halong Bay has appeared on the Maritime map of France. "Haiphong News" published in French, has reported: " Dragon appears on Halong Bay". The story can be summarized as follows: In 1898, lieutenant Lagoredin captain of Avalangso met a couple of giant sea snake on Halong Bay three times. Not only the lieutenant but also many other sailors saw those species. The European thought that those animals looked like Asian dragon. Maybe the appearance of strange animals led to the name of Quang Ninh sea area today: Halong Bay

 

According to local legend, when Vietnam had just started to develop into a country, they had to fight against invaders. To assist the Vietnamese in defending their country, the gods sent a family of dragons as protectors. This family of dragons began spitting out jewels and jade. These jewels turned into the islands and islets dotting the bay, linking together to form a great wall against the invaders. Under magics, numerous rock mountains abruptly appeared on the sea, ahead of invaders' ships; the forward ships struck the rocks and each other. After winning the battle, the dragons were interested in peaceful sightseeing of the Earth, and then decided to live in this bay. The place where the mother dragon descended was named Hạ Long, the place where the dragon's children attended upon their mother was called Bái Tử Long island (Bái: attend upon, Tử: children, Long: dragon), and the place where the dragon's children wriggled their tails violently was called Bạch Long Vỹ island (Bạch: white-color of the foam made when Dragon's children wriggled, Long: dragon, Vỹ: tail), present day Trà Cổ peninsula, Móng Cái.

 

OVERVIEW

The bay consists of a dense cluster of some 1,600 limestone monolithic islands each topped with thick jungle vegetation, rising spectacularly from the ocean. Several of the islands are hollow, with enormous caves. Hang Đầu Gỗ (Wooden stakes cave) is the largest grotto in the Hạ Long area. French tourists visited in the late 19th century, and named the cave Grotte des Merveilles. Its three large chambers contain large numerous stalactites and stalagmites (as well as 19th century French graffiti). There are two bigger islands, Tuần Châu and Cát Bà, that have permanent inhabitants, as well as tourist facilities including hotels and beaches. There are a number of beautiful beaches on the smaller islands.

 

A community of around 1,600 people live on Hạ Long Bay in four fishing villages: Cửa Vạn, Ba Hang, Cống Tàu and Vông Viêng in Hùng Thắng commune, Hạ Long city. They live on floating houses and are sustained through fishing and marine aquaculture (cultivating marine biota), plying the shallow waters for 200 species of fish and 450 different kinds of mollusks. Many of the islands have acquired their names as a result of interpretation of their unusual shapes. Such names include Voi Islet (elephant), Ga Choi Islet (fighting cock), Khi Islet (monkey), and Mai Nha Islet (roof). 989 of the islands have been given names. Birds and animals including bantams, antelopes, monkeys, and lizard also live on some of the islands.

 

Almost all these islands are as individual towers in a classic fenglin landscape with heights from 50m to 100m, and height/width ratios of up to about six.

 

Another specific feature of Halong Bay is the abundance of lakes inside the limestone islands. For example, Dau Be island has six enclosed lakes. All these island lakes occupy drowned dolines within fengcong karst.

 

LOCATION

Hạ Long Bay is located in northeastern Vietnam, from E106°56' to E107°37' and from N20°43' to N21°09'. The bay stretches from Yên Hưng district, past Hạ Long city, Cẩm Phả town to Vân Đồn District, bordered on the south and southeast by the Gulf of Tonkin, on the north by China, and on the west and southwest by Cát Bà Island. The bay has a 120 km long coastline and is approximately 1,553 km² in size with about 2,000 islets. The area designated by UNESCO as the World Natural Heritage Site incorporates 434 km² with 775 islets, of which the core zone is delimited by 69 points: Đầu Gỗ island on the west, Ba Hầm lake on the south and Cống Tây island on the east. The protected area is from the Cái Dăm petrol store to Quang Hanh commune, Cẩm Phả town and the surrounding zone.

 

CLIMATE

The climate of the bay is tropical, wet, sea islands, with two seasons: hot and moist summer, and dry and cold winter. The average temperature is from 15 °C- 25 °C, and annual rainfall is between 2 meters and 2.2 meters. Hạ Long Bay has the typical diurnal tide system (tide amplitude ranges from 3.5-4m). The salinity is from 31 to 34.5MT in the dry season and lower in the rainy season.

 

HISTORY

SOI NHU CULTURE (16,000–5000 BC)

Located in Hạ Long and Bái Tử Long are archaeological sites such as Mê Cung and Thiên Long. There are remains from mounds of mountain shellfish (Cyclophorus), spring shellfish (Melania), some fresh water mollusc and some rudimentary labour tools. The main way of life of Soi Nhụ's inhabitants included catching fish and shellfish, collecting fruits and digging for bulbs and roots. Their living environment was a coastal area unlike other Vietnamese cultures, for example, like those found in Hòa Bình and Bắc Sơn.

 

CAI BEO CULTURE (5000–3000 BC)

Located in Hạ Long and Cát Bà island, its inhabitants developed to the level of sea exploitation. Cái Bèo culture is a link between Soi Nhụ culture and Hạ Long culture.

 

FEUDAL PERIOD

History shows that Hạ Long Bay was the setting for local naval battles against Vietnam's coastal neighbors. On three occasions, in the labyrinth of channels in Bạch Đằng River near the islands, the Vietnamese army stopped the Chinese from landing. In 1288, General Trần Hưng Đạo stopped Mongol ships from sailing up the nearby Bạch Đằng River by placing steel-tipped wooden stakes at high tide, sinking the Mongol Kublai Khan's fleet.

 

During the Vietnam War, many of the channels between the islands were heavily mined by the United States navy, some of which pose a threat to shipping to this day.

 

GEOLOGY AND GEOMORPHOLOGY

In 2000, the UNESCO’s World Heritage Committee has inscribed the Hạ Long Bay in the World Heritage List according to its outstanding examples representing major stages of the Earth’s history and its original limestone karstic geomorphologic features. The Hạ Long Bay and its adjacent areas consist of a part of the Sino-Vietnamese composite terrane having its development history from pre-Cambrian up to present day. During Phanerozoic, terrigenous, volcanogenic and cherty-carbonate sediments containing in abundance graptolites, brachiopods, fishes, corals, foraminiferas, radiolarias, bivalves and flora, separated one from another by 10 stratigraphic gaps, but the boundary between Devonian and Carboniferous has been considered as continuous. The limestone karstic geomorphology of the bay was developed since Miocene, especially the cone-shaped hills (fengcong), or isolated high limestone karst towers (fenglin) with many remnants of old phreatic caves, old karstic foot caves, marine notch caves form magnificent limestone karst landforms as unique on the world. The Quaternary geology was developed through 5 cycles with the intercalation of marine and continental environments. The present Hạ Long Bay, in fact, appeared after the Middle Holocene maximum transgression, leaving ultimate zone of lateral undercutting in the limestone cliffs bearing many shells of oysters, having the 14C age as 2280 to >40,000 y. BP. Geological resources are abundant: anthracite, lignite, oil shale, petroleum, phosphate, limestone and cement additives, kaolin, silica sand, dolomite, quartzite of exogenous origin, and antimony, mercury of hydrothermal origin. Besides, there still are surface water, groundwater and thermal mineral water on the shore of the Hạ Long - Bái Tử Long Bays and other environmental resources.

 

In terms of marine geology, this area is recorded as an especially coastal sedimentary environment. In the alkaline seawater environment, the chemical denudation process of calcium carbonate proceeds rapidly, creating wide, strangely shaped marine notches.

 

The bottom surface sediments are various from clay mud to sand, however, silty mud and clay mud are dominated in distribution. Especially, the carbonate materials originated from organisms make up from 60-65% sedimentary content. The surface sediments of coral reefs are mainly sand and pebbles of which the carbonate materials occupy for more than 90%. The intertidal zone sediments are various from clay mud to sand and gravel depending to distinguished sedimentary environments such as mangrove marshes, tidal flats, beaches etc. At the small, but wonderfully beautiful beaches, the sand sediments may be dominated quartz or carbonate materials.

 

The sediment layers of intertidal zone, the upper sea bed with a plain surface conserving ancient rivers, systems of caves and it's sediments, traces of ancient marine action forming distinctive notches, beaches and marine terraces, mangrove swamps are important evidence of geological events and processes taking place during Quaternary.

 

HISTORY OF TECTONICS

Hạ Long Bay has experienced at least 500 million years in various geological states of orogeny, marine transgression and marine regression. During the Ordovician and Silurian periods (500-410 million years ago), Hạ Long Bay was deep sea. During the Carboniferous and Permian periods (340-250 million years ago), Hạ Long Bay was at shallow sea level.

 

The dominated uplift movement of neotectonic and recent tectonic influenced deeply on topography of this area, and the present landscape of sea-islands was formed around 7 or 8 thousand years ago by the sea invasion during Holocene transgression begun at about 17-18 thousand years ago. Particularly from the Holocene time, from about 11,000 years ago Cat Ba - Hạ Long area has much archaeological evidence connecting variations in sea levels with the development of ancient cultures such as the Soi Nhu and Ha Long cultures.

 

KARST GEOMORPHOLOGY VALUE

Due to a simultaneous combination of ideal factors such as thick, pale, grey, and strong limestone layers, which are formed by fine-grained materials; hot and moist climate and slow tectonic process as a whole; Hạ Long Bay has had a complete karst evolution for 20 million years. There are many types of karst topography in the bay, such as karst field.

 

Hạ Long Bay is a mature karst landscape developed during a warm, wet, tropical climate. The sequence of stages in the evolution of a karst landscape over a period of 20 million years requires a combination of several distinct elements including a massive thickness of limestone, a hot wet climate and slow overall tectonic up lift. The process of karst formation is divided into five stage is the formation of the distinctive do line karst. This is followed by the development of fengcong karst can be seen in the groups of hills on Bo Hon and Dau Be Inland. These cones with sloping side average 100m in height with the tallest exceeding 200m. Fenglin karst is characterised by steep separate towers. The hundreds of rocky islands with form the beautiful and famous landscape of the Bay are the individual towers of a classic Fenglin landscape where the intervening plains have been submerged by the sea. Most towers reach a height of between 50 and 100m with a height to width ratio of about 6. The karst dolines were flooded by the sea becoming the abundance of lakes that lie within the limestone islands. For example, Dau Be island at the mouth of the Bay has six enclosed lakes including those of the Ba Ham lakes lying within its fencong karst. The Bay contains examples of the landscape elements of fengcong, fenglin and karst plain. These are not separate evolutionary stages but the result of natural non – uniform processes in the denudation of a large mass of limestone. Marine erosion created the notches which in some places have been enlarged into caves. The marine notch is a feature of limestone coastline but, in Ha Long Bay, it has created the mature landscape.

 

Within Ha Long Bay, the main accessible caves are the older passages that survive from the time when the karst was evolving though its various stages of fengcong and fenglin. Three main types of caves can be recognized in the limestone islands (Waltham, T. 1998):

 

Remnants of old phreatic caves

Old karstic foot caves

Marine notch caves

 

The first group of caves is old phreatic caves which include Sung Sot, Tam Cung, Lau Dai, Thien Cung, Dau Go, Hoang Long, Thien Long. Nowadays, these caves lie at various high levels. Sung Sot cave is on Bo Hon island. From its truncated entrance chambers on allege high on the cliff, a passage of more that 10m high and wide descends to the south. Tam Cung is a large phreatic fissure cave that developed in the bedding planes of the limestone dividing the fissure cave into three chambers. Lau Dai is a cave with a complex of passages extending over 300m opening on the south side of Con Ngua island. Thien Cung and Dau Go are remnants of the same old cave system. They both survive in the northern part of Dau Go island at between 20 and 50m above sea level. Thien Cung has one large chamber more that 100m long, blocked at its ends and almost subdivided into smaller chambers by massive wall of stalactites and stalagmites. Dau Go is a single large tunnel descending along a major set of fractures to a massive choke.

 

The second group of caves is the old karstic foot caves which include Trinh Lu, Bo Nau, Tien Ong and Trong caves. Foot caves are a ubiquitous feature of karst landscapes which have reached a stage of widespread lateral undercutting at base level. They may extend back into maze caves of stream caves draining from larger cave systems within the limestone. They are distinguished by the main elements of their passages being close to the horizontal and are commonly related to denuded or accumulated terraces at the old base levels. Trinh Nu, which is one of the larger foot caves in Ha Long Bay with its ceiling at about 12m above sea level and about 80m in length, was developed in multiple stages. Bo Nau, a horizontal cave containing old stalactite deposits, cuts across the 25o dip of the bedding plane.

 

The third group is the marine notch caves that are a special feature of the karst of Ha Long Bay. The dissolution process of sea water acting on the limestone and erosion by wave action crates notches at the base of the cliffs. In advantageous conditions, dissolution of the limestone allows the cliff notches to be steadily deepened and extended into caves. Many of these at sea level extend right though the limestone hills into drowned dolines which are now tidal lakes.

 

A distinguishing feature of marine notch caves is an absolutely smooth and horizontal ceiling cut through the limestone. Some marine notch caves had been not formed at present sea level, but old sea levels related to sea level changes in Holocene transgression, event to Pleistocene sea levels. Some of them passed preserved the development of old karstic foot cave in mainland environment or preserved the remnants of older phreatic caves. One of the most unusual features of Ha Long Bay is the Bo Ham lake group of hidden lakes and their connecting tunnel – notch caves in Dau Be island. From the island’s perimeter cliff a cave, 10m wide at water level and curving so that it is almost completely dark, extends about 150m to Lake 1. Luon cave is on Bo Hon island and extends 50m though to an enclosed tidal lake. It has a massive stalactite hanging 2m down and truncated at the modern tidal level. It has passed though many stages in its formation.

 

The karst landscape of Ha Long Bay is of international significance and of fundamental importance to the science of geomorphology. The fenglin tower karst, which is the type present in much of Ha Long Bay, is the most extreme form of limestone landscape development. If these karst landscapes are broadly compared in terms of their height, steepness and number of their limestone towers, Ha Long Bay is probably second in the entire world only to Yangshou, in China. However, Ha Long Bay ha also been invaded by the sea so that the geomorphology of its limestone is lands are, at least in part, the consequence of marine erosion. The marine invasion distinguishes Ha Long Bay and makes it unique in the world. There are other areas of submerged karst towers which were invaded by the sea, but none is as extensive as Ha Long Bay.

 

TIMELINE OF GEOLOGIC EVOLUTION

Some of the most remarkable geological events in Hạ Long Bay's history have occurred in the last 1,000 years, include the advance of the sea, the raising of the bay area, strong erosion that has formed coral, and, pure blue and heavily salted water. This process of erosion by seawater has deeply engraved the stone, contributing to its fantastic beauty. Present-day Hạ Long Bay is the result of this long process of geological evolution that has been influenced by so many factors.

 

Due to all these factors, tourists visiting Hạ Long Bay are not only treated to one of the natural wonders of the world, but also to a precious geological museum that has been naturally preserved in the open air for the last 300 million years.

 

ECOLOGY

Halong Bay is host to two ecosystems: a tropical, moist, evergreen rainforest ecosystem; and a marine and coastal ecosystem. The bay is home to seven endemic species: Livistona halongensis, Impatiens halongensis, Chirita halongensis, Chirita hiepii, Chirita modesta, Paraboea halongensis and Alpinia calcicola.

 

The many islands that dot the bay are home to a great many other species, including (but likely not limited to): 477 magnoliales, 12 pteris, 20 salt marsh flora; and 4 amphibia, 10 reptilia, 40 aves, and 4 mammalia.

 

Common aquatic species found in the bay include: cuttlefish (mực); oyster (hào); cyclinae (ngán); prawns (penaeidea (tôm he), panulirus (tôm hùm), parapenaeopsis (tôm sắt), etc.); sipunculoideas (sá sùng); nerita (ốc đĩa); charonia tritonis (ốc tù và); and cà sáy.

 

ENVIRONMENTAL DAAGE

With an increasing tourist trade, mangroves and seagrass beds have been cleared and jetties and wharves have been built for tourist boats.

 

Game fishing, often near coral reefs, is threatening many endangered species of fish.

 

Local government and businesses are aware of problems and many measures have been taken to minimize tourism affect to the bay environment for sustainable economic growth like introducing eco friendly tours and introducing tight waste control on resorts.

 

AWARDS AND DESIGNATIONS

In 1962, the Vietnam Ministry of Culture, Sport and Tourism designated Hạ Long Bay a 'Renowned National Landscape Monument'.

 

Hạ Long Bay was first listed as a UNESCO World Heritage Site in 1994, in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognised Hạ Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated.

 

In October 2011, World Monuments Fund included the bay on the 2012 World Monuments Watch, citing tourism pressures and associated development as threats to the site that must be addressed. The goal of Watch-listing is to promote strategies of responsible heritage-driven development for a sustainable future.

 

In 2012, New 7 Wonders Foundation officially named Halong Bay as one of New Seven Natural Wonders of the world.

 

Hạ Long Bay is also a member of the Club of the Most Beautiful Bays of the World.

 

IN LITERATURE

In writings about Hạ Long Bay, the following Vietnamese writers said:

 

Nguyễn Trãi: "This wonder is ground raising up into the middle of the high sky".

Xuân Diệu: "Here is the unfinished works of the Beings...Here is the stones which the Giant played and threw away".

Nguyên Ngọc: "...to form this first- rate wonder, nature only uses: Stone and Water...There are just only two materials themselves chosen from as much as materials, in order to write, to draw, to sculpture, to create everything...It is quite possible that here is the image of the future world".

Ho Chi Minh: "It is the wonder that one cannot impart to others".

Phạm Văn Đồng: "Is it one scenery or many sceneries? Is it the scenery in the world or somewhere?".

Nguyễn Tuân: "Only mountains accept to be old, but Hạ Long sea and wave are young for ever".

Huy Cận: "Night breathes, stars wave Hạ Long's water".

Chế Lan Viên:

 

"Hạ Long, Bái Tử Long- Dragons were hidden, only stones still remain

On the moonlight nights, stones meditate as men do..."

Lord Trịnh Cương overflowed with emotion: "Mountains are glistened by water shadow, water spills all over the sky".

 

ANCIENT TALES

Hạ Long bay's inhabitants have developed numerous tales explaining names given to various isles and caves in the bay.

 

Đầu Gỗ cave (literally: "the end of wooden bars" cave): these wooden bars in this cave are the remnants of sharped wooden columns built under the water level by the order of Trần Hưng Đạo commander in order to sink Mongolian invaders' ships in the 13th century.

Kim Quy cave (literally: "Golden Turtle" cave): it is told that the Golden Turtle swam toward the Eastern Sea (international name: South China Sea) after returning the holy sword which had assisted King Lê Thái Tổ in the combat against Ming invaders from China. Next, with the approval of the Sea King, Golden Turtle continued to fight against monsters in this marine area. The turtle became exhausted and died in a cave. Consequently, the cave was named after the Golden Turtle.

Con Cóc isle (literally: Frog isle): is a frog- like isle. According to ancient tales, in a year of severe drought, a frog directed all animals to the Heaven and protested against the God. They demonstrated in favour of making rain. As a result, the God must accept the frog as his uncle. Since then, whenever frogs grind their teeth, the God has to pour water down the ground.

 

WIKIPEDIA

The pig (Sus domesticus), often called swine (pl.: swine), hog, or domestic pig when distinguishing from other members of the genus Sus, is an omnivorous, domesticated, even-toed, hoofed mammal. It is variously considered a subspecies of Sus scrofa (the wild boar or Eurasian boar) or a distinct species. Pigs were domesticated in the Neolithic, both in East Asia and in the Near East. When these arrived in Europe, they extensively interbred with wild boar but retained their domesticated features.

 

Pigs are farmed primarily for meat, called pork. The animal's skin or hide is used for leather. China is the world's largest pig producer, followed by the European Union and then the United States. Around 1.5 billion pigs are raised each year, producing some 120 million tonnes of meat.

 

Pigs have featured in human culture since Neolithic times, appearing in art and literature for children and adults.

 

Description

The pig has a large head, with a long snout strengthened by a special prenasal bone and a disk of cartilage at the tip. The snout is used to dig into the soil to find food and is an acute sense organ. The dental formula of adult pigs is

3.1.4.3

3.1.4.3

, giving a total of 44 teeth. The rear teeth are adapted for crushing. In the male, the canine teeth can form tusks, which grow continuously and are sharpened by constantly being ground against each other. There are four hoofed toes on each foot; the two larger central toes bear most of the weight, while the outer two are also used in soft ground. Most pigs have rather sparsely bristled hair on their skin, though there are some woolly-coated breeds such as the Mangalitsa.

 

Pigs possess both apocrine and eccrine sweat glands, although the latter are limited to the snout. Pigs, like other "hairless" mammals such as elephants, do not use thermal sweat glands in cooling. Pigs are less able than many other mammals to dissipate heat from wet mucous membranes in the mouth by panting. Their thermoneutral zone is 16–22 °C (61–72 °F). At higher temperatures, pigs lose heat by wallowing in mud or water via evaporative cooling, although it has been suggested that wallowing may serve other functions, such as protection from sunburn, ecto-parasite control, and scent-marking. Pigs are among four mammalian species with mutations in the nicotinic acetylcholine receptor that protect against snake venom. Mongooses, honey badgers, hedgehogs, and pigs all have different modifications to the receptor pocket which prevents α-neurotoxin from binding. Pigs have small lungs for their body size, and are thus more susceptible than other domesticated animals to fatal bronchitis and pneumonia. Pigs have a maximum life span of about 27 years. The genome of the pig has been sequenced; it contains about 22,342 protein-coding genes.

 

Taxonomy

The pig is most often considered to be a subspecies of the wild boar, which was given the name Sus scrofa by Carl Linnaeus in 1758; following from this, the formal name of the pig is Sus scrofa domesticus. However, in 1777, Johann Christian Polycarp Erxleben classified the pig as a separate species from the wild boar. He gave it the name Sus domesticus, still used by some taxonomists. The American Society of Mammalogists considers it a separate species.

 

Domestication in the Neolithic

Archaeological evidence shows that pigs were domesticated from wild boar in the Near East in or around the Tigris Basin, being managed in the wild in a way similar to the way they are managed by some modern New Guineans. There were pigs in Cyprus more than 11,400 years ago, introduced from the mainland, implying domestication in the adjacent mainland by then. Pigs were separately domesticated in China, starting some 8,000 years ago. In the Near East, pig husbandry spread for the next few millennia. It reduced gradually during the Bronze Age, as rural populations focused instead on commodity-producing livestock, but it was sustained in cities.

 

Domestication did not involve reproductive isolation with population bottlenecks. Western Asian pigs were introduced into Europe, where they crossed with wild boar. There appears to have been interbreeding with a now extinct ghost population of wild pigs during the Pleistocene. The genomes of domestic pigs show strong selection for genes affecting behavior and morphology. Human selection for domestic traits likely counteracted the homogenizing effect of gene flow from wild boars and created domestication islands in the genome. Pigs arrived in Europe from the Near East at least 8,500 years ago. Over the next 3,000 years they interbred with European wild boar until their genome showed less than 5% Near Eastern ancestry, yet retained their domesticated features.

 

DNA evidence from subfossil remains of teeth and jawbones of Neolithic pigs shows that the first domestic pigs in Europe were brought from the Near East. This stimulated the domestication of local European wild boar, resulting in a third domestication event with the Near Eastern genes dying out in European pig stock. More recently there have been complex exchanges, with European domesticated lines being exported, in turn, to the ancient Near East. Historical records indicate that Asian pigs were again introduced into Europe during the 18th and early 19th centuries.

 

History

Columbian Exchange

Among the animals that the Spanish introduced to the Chiloé Archipelago in the 16th century Columbian Exchange, pigs were the most successful in adapting to local conditions. The pigs benefited from abundant shellfish and algae exposed by the large tides of the archipelago. Pigs were brought to southeastern North America from Europe by de Soto and other early Spanish explorers. Escaped pigs became feral, disrupting the lives of Native Americans.

 

With a population of around 1 billion individuals, the domesticated pig is one of the most numerous large mammals on the planet.

 

Feral pigs

Pigs have escaped from farms and gone feral in many parts of the world. Feral pigs in the southeastern United States have migrated north to the Midwest, where many state agencies have programs to remove them. Feral pigs in New Zealand and northern Queensland have caused substantial environmental damage. Feral hybrids of the European wild boar with the domestic pig are disruptive to both environment and agriculture, especially in southeastern South America.

 

Reproduction

Female pigs reach sexual maturity at 3–12 months of age and come into estrus every 18–24 days if they are not successfully bred. The variation in ovulation rate can be attributed to intrinsic factors such as age and genotype, as well as extrinsic factors like nutrition, environment, and the supplementation of exogenous hormones. The gestation period averages 112–120 days.

 

Estrus lasts two to three days, and the female's displayed receptiveness to mate is known as standing heat. Standing heat is a reflexive response that is stimulated when the female is in contact with the saliva of a sexually mature boar. Androstenol is one of the pheromones produced in the submaxillary salivary glands of boars that trigger the female's response. The female cervix contains a series of five interdigitating pads, or folds, that hold the boar's corkscrew-shaped penis during copulation. Females have bicornuate uteruses and two conceptuses must be present in both uterine horns for pregnancy to be established. Maternal recognition of pregnancy in pigs occurs on days 11 to 12 of pregnancy and is marked by progesterone production from a functioning corpus luteum. To avoid luteolysis by PGF2α, rescuing of the corpus luteum must occur via embryonic signaling of estradiol 17β and PGE2. This signaling acts on both the endometrium and luteal tissue to prevent the regression of the corpus luteum by activation of genes that are responsible for corpus luteum maintenance. During mid to late pregnancy, the corpus luteum relies primarily on Luteinizing hormone for maintenance until birth.

 

Archeological evidence indicates that medieval European pigs farrowed, or bore a litter of piglets, once per year. By the nineteenth century, European piglets routinely double-farrowed, or bore two litters of piglets per year. It is unclear when this shift occurred.

 

Behaviour

Pig behaviour is intermediate between that of other artiodactyls and of carnivores. Pigs seek out the company of other pigs, and often huddle to maintain physical contact, but do not naturally form large herds. They live in groups of about 8–10 adult sows, some young individuals, and some single males.

 

Because of their relative lack of sweat glands, pigs often control their body temperature using behavioural thermoregulation. Wallowing, coating the body with mud, is a common behaviour. They do not submerge completely under the mud, but vary the depth and duration of wallowing depending on environmental conditions. Adult pigs start wallowing once the ambient temperature is around 17–21 °C (63–70 °F). They cover themselves in mud from head to tail. They may use mud as a sunscreen, or to keep parasites away. Most bristled pigs "blow their coat", meaning that they shed most of the longer, coarser stiff hair once a year, usually in spring or early summer, to prepare for the warmer months ahead.

 

If conditions permit, pigs feed continuously for many hours and then sleep for many hours, in contrast to ruminants, which tend to feed for a short time and then sleep for a short time. Pigs are omnivorous and versatile in their feeding behaviour. They primarily eat leaves, stems, roots, fruits, and flowers. They are noticeably intelligent, on a par with dogs.

 

Rooting

Rooting is an instinctual comforting behaviour in pigs characterized by nudging the snout into something. It first happens when piglets are born to obtain their mother's milk, and can become a habitual, obsessive behaviour, most prominent in animals weaned too early. Pigs root and dig into the ground to forage for food. Rooting is also a means of communication.

 

Nest-building

A characteristic of pigs which they share with carnivores is nest-building. Sows root in the ground to create depressions the size of their body, and then build nest mounds, using twigs and leaves, softer in the middle, in which to give birth. When the mound reaches the desired height, she places large branches, up to 2 metres in length, on the surface. She enters the mound and roots around to create a depression within the gathered material. She then gives birth in a lying position, unlike other artiodactyls which usually stand while birthing.

 

Nest-building occurs during the last 24 hours before the onset of farrowing, and becomes most intense 12 to 6 hours before farrowing. The sow separates from the group and seeks a suitable nest site with well-drained soil and shelter from rain and wind. This provides the offspring with shelter, comfort, and thermoregulation. The nest provides protection against weather and predators, while keeping the piglets close to the sow and away from the rest of the herd. This ensures they do not get trampled on, and prevents other piglets from stealing milk from the sow. The onset of nest-building is triggered by a rise in prolactin level, caused by a decrease in progesterone and an increase in prostaglandin; the gathering of nest material seems to be regulated more by external stimuli such as temperature.

 

Nursing and suckling

Pigs have complex nursing and suckling behaviour. Nursing occurs every 50–60 minutes, and the sow requires stimulation from piglets before milk let-down. Sensory inputs (vocalisation, odours from mammary and birth fluids, and hair patterns of the sow) are particularly important immediately post-birth to facilitate teat location by the piglets. Initially, the piglets compete for position at the udder; then the piglets massage around their respective teats with their snouts, during which time the sow grunts at slow, regular intervals. Each series of grunts varies in frequency, tone and magnitude, indicating the stages of nursing to the piglets.

 

The phase of competition for teats and of nosing the udder lasts for about a minute, ending when milk begins to flow. The piglets then hold the teats in their mouths and suck with slow mouth movements (one per second), and the rate of the sow's grunting increases for approximately 20 seconds. The grunt peak in the third phase of suckling does not coincide with milk ejection, but rather the release of oxytocin from the pituitary into the bloodstream. Phase four coincides with the period of main milk flow (10–20 seconds) when the piglets suddenly withdraw slightly from the udder and start sucking with rapid mouth movements of about three per second. The sow grunts rapidly, lower in tone and often in quick runs of three or four, during this phase. Finally, the flow stops and so does the grunting of the sow. The piglets may dart from teat to teat and recommence suckling with slow movements, or nosing the udder. Piglets massage and suckle the sow's teats after milk flow ceases as a way of letting the sow know their nutritional status. This helps her to regulate the amount of milk released from that teat in future sucklings. The more intense the post-feed massaging of a teat, the more milk that teat later releases.

 

Teat order

In pigs, dominance hierarchies are formed at an early age. Piglets are precocious, and attempt to suckle soon after being born. The piglets are born with sharp teeth and fight for the anterior teats, as these produce more milk. Once established, this teat order remains stable; each piglet tends to feed on a particular teat or group of teats. Stimulation of the anterior teats appears to be important in causing milk letdown, so it might be advantageous to the entire litter to have these teats occupied by healthy piglets. Piglets locate teats by sight and then by olfaction.

 

Senses

Pigs have panoramic vision of approximately 310° and binocular vision of 35° to 50°. It is thought they have no eye accommodation. Other animals that have no accommodation, e.g. sheep, lift their heads to see distant objects. The extent to which pigs have colour vision is still a source of some debate; however, the presence of cone cells in the retina with two distinct wavelength sensitivities (blue and green) suggests that at least some colour vision is present.

 

Pigs have a well-developed sense of smell; use is made of this in Europe where trained pigs find underground truffles. Olfactory rather than visual stimuli are used in the identification of other pigs. Hearing is well developed; sounds are localised by moving the head. Pigs use auditory stimuli extensively for communication in all social activities. Alarm or aversive stimuli are transmitted to other pigs not only by auditory cues but also by pheromones. Similarly, recognition between the sow and her piglets is by olfactory and vocal cues.

 

Pests and diseases

Pigs are subject to many pests and diseases which can seriously affect productivity and cause death. These include parasites such as Ascaris roundworms, virus diseases such as the tick-borne African Swine Fever, bacterial infections such as Clostridium, arthritis caused by Mycoplasma, and stillbirths caused by Parvovirus.

 

Some parasites of pigs are a public health risk as they can be transmitted to humans in undercooked pork. These are the pork tapeworm Taenia solium; a protozoan, Toxoplasma gondii; and a nematode, Trichinella spiralis. Transmission can be prevented by thorough sanitation on the farm; by meat inspection and careful commercial processing; and by thorough cooking, or alternatively by sufficient freezing and curing.

 

In agriculture

Pigs have been raised outdoors, and sometimes allowed to forage in woods or pastures. In industrialized nations, pig production has largely switched to large-scale intensive pig farming. This has lowered production costs but has caused concern about possible cruelty. As consumers have become concerned with the humane treatment of livestock, demand for pasture-raised pork in these nations has increased. Most pigs in the US receive ractopamine, a beta-agonist drug, which promotes muscle instead of fat and quicker weight gain, requiring less feed to reach finishing weight, and producing less manure. China has requested that pork exports be ractopamine-free.

 

Like all animals, pigs are susceptible to adverse impacts from climate change, such as heat stress from increased annual temperatures and more intense heatwaves. Heat stress has increased rapidly between 1981 and 2017 on pig farms in Europe. Installing a ground-coupled heat exchanger is an effective intervention.

 

Breeds

Many breeds of pig have been created by farmers around the world, differing in coloration, shape, and size. According to The Livestock Conservancy, as of 2016, three breeds of pig are critically rare (having a global population of fewer than 2000). They are the Choctaw hog, the Mulefoot, and the Ossabaw Island hog. The smallest known pig breed in the world is the Göttingen minipig, typically weighing about 26 kilograms (57 lb) as a healthy, full-grown adult.

 

Economy

Global pig stock

in 2019

Number in millions

1. China (Mainland)310.4 (36.5%)

2. European Union143.1 (16.83%)

3. United States78.7 (9.26%)

4. Brazil40.6 (4.77%)

5. Russia23.7 (2.79%)

6. Myanmar21.6 (2.54%)

7. Vietnam19.6 (2.31%)

8. Mexico18.4 (2.16%)

9. Canada14.1 (1.66%)

10. Philippines12.7 (1.49%)

World total850.3

Source: UN Food and Agriculture Organization

Approximately 1.5 billion pigs are slaughtered each year for meat.

 

The pork belly futures contract became an icon of commodities trading. It appears in depictions of the arena in popular entertainment, such as the 1983 film Trading Places. Trade in pork bellies declined, and they were delisted from the Chicago Mercantile Exchange in 2011.

 

In 2023, China produced more pork than any other country, 55 million tonnes, followed by the European Union with 22.8 million tonnes and the United States with 12.5 million tonnes. Global production in 2023 was 120 million tonnes. India, despite its large population, consumed under 0.3 million tonnes of pork in 2023. International trade in pork (meat not consumed in the producing country) reached 13 million tonnes in 2020.

 

Uses

Pigs are farmed primarily for meat, called pork. Pork is eaten in the form of pork chops, loin or rib roasts, shoulder joints, steaks, and loin (also called fillet). The many meat products made from pork include ham, bacon, and sausages. Pork is further made into charcuterie products such as terrines, galantines, pâtés and confits. Some sausages such as salami are fermented and air-dried, to be eaten raw. There are many types, the original Italian varieties including Genovese, Milanese, and Cacciatorino, with spicier kinds from the South of Italy including Calabrese, Napoletano, and Peperone.

 

The hide is made into pigskin leather, which is soft and durable; it can be brushed to form suede leather. These are used for products such as gloves, wallets, suede shoes, and leather jackets.

 

In medicine

Pigs, both as live animals and as a source of post-mortem tissues, are valuable animal models because of their biological, physiological, and anatomical similarities to human beings. For instance, human skin is very similar to the pigskin, therefore pigskin has been used in many preclinical studies.

 

Pigs are good non-human candidates for organ donation to humans, and in 2021 became the first animal to successfully donate an organ to a human body. The procedure used a donor pig genetically engineered not to have a specific carbohydrate that the human body considers a threat–Galactose-alpha-1,3-galactose. Pigs are good for human donation as the risk of cross-species disease transmission is reduced by the considerable phylogenetic distance from humans. They are readily available, and the danger of creating new human diseases is low as domesticated pigs have been in close contact with humans for thousands of years.

 

In culture

Pigs, widespread in societies around the world since Neolithic times, have been used for many purposes in art, literature, and other expressions of human culture. In classical times, the Romans considered pork the finest of meats, enjoying sausages, and depicting them in their art. Across Europe, pigs have been celebrated in carnivals since the Middle Ages, becoming specially important in Medieval Germany in cities such as Nuremberg, and in Early Modern Italy in cities such as Bologna. Pigs, especially miniature breeds, are occasionally kept as pets.

 

In literature, both for children and adults, pig characters appear in allegories, comic stories, and serious novels. In art, pigs have been represented in a wide range of media and styles from the earliest times in many cultures. Pig names are used in idioms and animal epithets, often derogatory, since pigs have long been linked with dirtiness and greed, while places such as Swindon are named for their association with swine. The eating of pork is forbidden in Islam and Judaism, but pigs are sacred in some other religions.

Opening on Amazon:

 

All people can create value—but for that to happen, we need to develop a people-centered, rather than a task-centered, economy. Today, we are very far from that. According to Gallup, of the five billion people on this planet aged fifteen or older, three billion work in some way. Most of them want full-time jobs, but only 1.3 billion have them. Of these, only 13 percent are fully engaged in their work, giving and receiving its full value. This terrible waste of human capacity and mismanagement of people’s desire to create value for each other is more than just very bad business. It is an insult to ourselves and to all human beings.

 

CHAPTER 5. Accelerating Towards a Jobless Future:

The Rise of the Machine and the Human Quest for Meaningful Work by Steve Jurvetson and Mo Islam

 

A New Paradigm

 

Let’s go far enough in the future where no one will debate the sweeping transition of time. There are infinite possible paths to this distant future, but we can imagine reasonable endpoints. This future will look like much of human history prior to the industrial and agricultural revolutions, where serfs and slaves did most of the labor-intensive work in the city-state economies. But while we hope the arc of the moral universe continues to bend towards justice, there will be a new paradigm in master and slave relationship between man and machine. The slaves of the future will be our machines.

 

There won’t be many jobs in the sense that we think of them for most people today. Machines will take over mechanically repetitive tasks. Humans will ever only need to do this type of work if they choose to, but they will not provide the most efficient means to complete these tasks. Even highly skilled workers, such as engineers, doctors, and scientists, will have their professions disrupted by automation and artificial intelligence. We will automate engineering, we will automate diagnosis, and we will automate discovery of scientific principles. In this future, where the marginal cost of labor is zero and where companies have reached new bounds of profit maximization, both the microeconomics of individual companies and the macroeconomics of the global economy will be completely upended. Maslow’s hierarchy of needs—food, shelter, health care, education—will be free for everyone forever. We won’t need to work to achieve the basic building blocks of sustainable civilization. The only important human need that will be amplified in this distant future even more than it is now is the desire for meaning.

 

Humanity’s Compounding Capacity to Compute

 

First, we will lay a framework for understanding why we believe this is a possible future. We are already on the trajectory to get us there—we have been since the dawn of the industrial age. Humanity’s capacity to compute has been constantly compounding. Incredibly, it can be explained through a simple and elegant model that, at first glance, may seem narrow in its explanatory power, but that tells a much deeper story. That model to describe this macrotrend begins with Moore’s Law. Moore’s Law is commonly reported as a doubling of transistor density every eighteen months. But unless you work for a chip company and focus on fab-yield optimization, you do not care about the transistor counts that Gordon Moore originally wrote about. When recast as a computational capability, Moore’s Law is no longer a transistor-centric metric.

 

What Moore observed in the belly of the early integrated circuit industry was a derivative metric, a refraction of a longer-term trend, a trend that begs various philosophical questions and predicts mind-bending futures. Ray Kurzweil’s abstraction of Moore’s Law shows computational power on a logarithmic scale and finds a double exponential curve that holds over 110 years! A straight line would represent a geometrically compounding curve of progress.

 

Figure 1: Ray Kurzweil’s abstraction of Moore’s Law. Each dot is a computer. (older version)

 

Through five paradigm shifts—such as electromechanical calculators and vacuum tube computers—the computational power that $1,000 buys has doubled every two years. For the past thirty years, it has been doubling every year.

 

Each dot is the frontier of computational price performance of the day. One machine was used in the 1890 census; one cracked the Nazi Enigma cipher in World War II; one predicted Eisenhower’s win in the 1956 presidential election. Many of them can be seen in the Computer History Museum. Each dot represents a human drama. Prior to Moore’s seminal paper in 1965, which presented what later became known as Moore’s Law, none of them even knew they were on a predictive curve. Each dot represents an attempt to build the best computer with the tools of the day. Of course, we use these computers to make better design software and manufacturing control algorithms. And so the progress continues.

 

Notice also that the pace of innovation is exogenous to the economy. The Great Depression and the world wars and various recessions do not introduce a meaningful change in the long-term trajectory of Moore’s Law. Certainly, the adoption rates, revenues, profits, and economic fates of the computer companies behind the various dots on the graph may go through wild oscillations, but the long-term trend emerges nevertheless.

 

In the modern era of accelerating change in the tech industry, it is hard to find even five-year trends with any predictive value, let alone trends that span the centuries. We would go further and assert that this is the most important graph ever conceived, and this is why it is so important as a foundation for understanding the future. We humans, regardless of external factors such as war, disease, and failing economies, have over vast periods of time doubled our capabilities to produce new technologies to propel us forward.

 

Accelerating Technological Progress

 

Moore’s law has set the bar for the accelerating pace of computation and innovation. How can we expect it to keep accelerating to get even faster now to the distant future we describe? All new technologies are combinations of technologies that already exist. Innovation does not occur in a vacuum; it is a combination of ideas from before. In any academic field, the advances today are built on a large edifice of history. This is why major innovations tend to be “ripe” and tend to be discovered at nearly the same time by multiple people. The compounding of ideas is the foundation of progress, something that was not so evident to the casual observer before the age of science. Science tuned the process parameters for innovation and became the best method for a culture to learn.

 

From this conceptual base comes the origin of economic growth and acceleration of technological change, as the combinatorial explosion of possible idea pairings grows exponentially as new ideas come into the mix, as dictated by Reed’s Law. It explains the innovative power of urbanization and networked globalization. And it explains why interdisciplinary ideas are so powerfully disruptive; it is like the differential immunity of epidemiology, whereby islands of cognitive isolation (e.g., academic disciplines) are vulnerable to disruptive memes hopping across them, in much the same way that South America was vulnerable to smallpox from Cortés and the Conquistadors. If disruption is what you seek, cognitive island hopping is good place to start, mining the interstices between academic disciplines.

 

It is the combinatorial explosion of possible innovation-pairings that creates economic growth, and it is about to go into overdrive. In recent years, we have begun to see the global innovation effects of a new factor: the Internet. People can exchange ideas as never before. Long ago, people were not communicating across continents; ideas were partitioned, and so the success of nations and regions pivoted on their own innovations. Richard Dawkins states that in biology it is genes which really matter, and we as people are just vessels for the conveyance of genes. It is the same with ideas or “memes.” We are the vessels that hold and communicate ideas, and now that pool of ideas percolates on a global basis more rapidly than ever before.

 

Rise of the Machines

 

Moore’s Law provides the model for us to understand humanity’s continuous compounding capacity to compute—with that we have accelerating technological progress driven by the combinatorial explosion of new ideas by ever-increasing sub-groups of cognitively diverse people becoming connected. However, the ramifications of this longer-term trend will start to become apparent in the very short term. We believe the greatest disruptor for job displacement caused by this accelerating innovation is the self-driving car.

 

In five years, it will be clear that the debate about the rise of the autonomous vehicle will have ended. Everyone will realize its ubiquity, especially as the first city pilots with autonomous vehicles begin rolling out. The Google car has already driven over a million miles without causing an accident. Automotive original equipment manufacturers and new companies are investing massive amounts of capital and engineering manpower to get to market with fully (Level 4) autonomous cars. The commercialization path of these self-driving cars, whether through an Uber-like on-demand service or through direct sales to consumers, is less important than the enormous impact they will have on the global job market. Using global employment data from the International Labour Organization (ILO), we find that by 2019, 5.7 percent of global employment will be in the transport, storage, and communication sector (See Figure 2). Moreover, the distribution of employment status data shows us that globally more than 60 percent of all workers lack any kind of employment contract, with most of them engaged in unpaid or family work in the developing world (See Figure 3). We find that, of workers worldwide who have a paid full-time job (excluding temporary workers), almost 20 percent drive as their form of employment today!

 

And autonomous vehicles are only the tip of the iceberg. As these systems transcend human comprehension, we will shift from traditional engineering to evolutionary algorithms and iterative learning algorithms such as deep learning and machine learning. While these techniques are powerful, the locus of learning shifts from the artifacts themselves to the process that created them. The beauty of compounding iterative algorithms (evolution, fractals, organic growth, art) derives from their irreducibility. And it empowers us to design complex systems that exceed human understanding, which we increasingly need to do at the cutting edge of software engineering. This process presents a plausible path to general artificial intelligence, or what Ray Kurzweil and others refer to as “strong A.I.” Danny Hillis summarizes succinctly in the conclusion from his programming primer The Pattern on the Stone: “We will not engineer an artificial intelligence; rather we will set up the right conditions under which an intelligence can emerge. The greatest achievement of our technology may well be creation of tools that allow us to go beyond engineering—that allow us to create more than we can understand.” Once we build these systems that surpass human understanding and that may even surpass human intelligence, the number of jobs that will be overhauled is unbounded—leading us to a future where no one will have to work.

 

Figure 2: Employment growth by sector, in which transport is one of the fasting growing.

 

Figure 3: Distribution of employment status, showing that only 40 percent of people have full-time jobs

 

Meaningful Work

 

Moore’s Law will drive human innovation forward and the collective global intelligence will create new forms of super artificial intelligence that can surpass human capabilities. This will completely disrupt our notion of jobs. Work is now the very thing that powers our global economy. But what happens when it no longer has to? Or at least, when most humans are no longer the aggregate primary drivers of global work, how will we find meaning in our lives? This existential phenomenon is one that will completely turn the current debate about the race against the machine on its head: the debate will no longer be about machines taking human jobs but instead about humans needing meaning in their work, even though it may no longer be for employment. The nature of jobs as we think about them today will dramatically change in the future, but humans will retain their thirst for deriving purpose from their actions. This is already becoming a major focus for employers now, as millennials entering the job market are interested in more than just salary, benefits, and job security to satisfy their work expectations. They want to be a part of something larger, to fulfill a mission that can really change the world. As we look to this distant future where employment isn’t necessary for most humans, finding meaning through non-traditional forms of work, whether hobbies, research, or entertainment will become paramount to sustaining a thriving civilization.

Hạ Long Bay (Vietnamese: Vịnh Hạ Long, About this sound listen, literally: "descending dragon bay") is a UNESCO World Heritage Site, and a popular travel destination, in Quảng Ninh Province, Vietnam. Administratively, the bay belongs to Hạ Long City, Cẩm Phả town, and the part of Vân Đồn District. The bay features thousands of limestone karsts and isles in various sizes and shapes. Hạ Long Bay is a center of a larger zone which includes Bái Tử Long bay to the northeast, and Cát Bà islands to the southwest. These larger zones share similar geological, geographical, geomorphological, climate, and cultural characters.

 

Hạ Long Bay has an area of around 1,553 km2, including 1,960–2,000 islets, most of which are limestone. The core of the bay has an area of 334 km2 with a high density of 775 islets. The limestone in this bay has gone through 500 million years of formation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years under the impact of the tropical wet climate. The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. Hạ Long Bay is home to 14 endemic floral species and 60 endemic faunal species.

 

Historical research surveys have shown the presence of prehistorical human beings in this area tens of thousands years ago. The successive ancient cultures are the Soi Nhụ culture around 18,000–7000 BC, the Cái Bèo culture 7000–5000 BC and the Hạ Long culture 5,000–3,500 years ago. Hạ Long Bay also marked important events in the history of Vietnam with many artifacts found in Bài Thơ Mount, Đầu Gỗ Cave, Bãi Cháy.

 

500 years ago, Nguyễn Trãi praised the beauty of Hạ Long Bay in his verse Lộ nhập Vân Đồn, in which he called it "rock wonder in the sky".[8] In 1962, the Ministry of Culture, Sports and Tourism of North Vietnam listed Hạ Long Bay in the National Relics and Landscapes publication. In 1994, the core zone of Hạ Long Bay was listed by UNESCO as a World Heritage Site according to criterion vii, and listed for a second time according to criterion viii.

 

ETYMOLOGY

The name Hạ Long is derived from the Sino-Vietnamese 下龍, meaning "descending dragon".

 

Before 19th century, the name Halong Bay had not been recorded in the old books of our country. It has been called An Bang, Luc Thuy, Van Don... Late 19th century, the name Halong Bay has appeared on the Maritime map of France. "Haiphong News" published in French, has reported: " Dragon appears on Halong Bay". The story can be summarized as follows: In 1898, lieutenant Lagoredin captain of Avalangso met a couple of giant sea snake on Halong Bay three times. Not only the lieutenant but also many other sailors saw those species. The European thought that those animals looked like Asian dragon. Maybe the appearance of strange animals led to the name of Quang Ninh sea area today: Halong Bay

 

According to local legend, when Vietnam had just started to develop into a country, they had to fight against invaders. To assist the Vietnamese in defending their country, the gods sent a family of dragons as protectors. This family of dragons began spitting out jewels and jade. These jewels turned into the islands and islets dotting the bay, linking together to form a great wall against the invaders. Under magics, numerous rock mountains abruptly appeared on the sea, ahead of invaders' ships; the forward ships struck the rocks and each other. After winning the battle, the dragons were interested in peaceful sightseeing of the Earth, and then decided to live in this bay. The place where the mother dragon descended was named Hạ Long, the place where the dragon's children attended upon their mother was called Bái Tử Long island (Bái: attend upon, Tử: children, Long: dragon), and the place where the dragon's children wriggled their tails violently was called Bạch Long Vỹ island (Bạch: white-color of the foam made when Dragon's children wriggled, Long: dragon, Vỹ: tail), present day Trà Cổ peninsula, Móng Cái.

 

OVERVIEW

The bay consists of a dense cluster of some 1,600 limestone monolithic islands each topped with thick jungle vegetation, rising spectacularly from the ocean. Several of the islands are hollow, with enormous caves. Hang Đầu Gỗ (Wooden stakes cave) is the largest grotto in the Hạ Long area. French tourists visited in the late 19th century, and named the cave Grotte des Merveilles. Its three large chambers contain large numerous stalactites and stalagmites (as well as 19th century French graffiti). There are two bigger islands, Tuần Châu and Cát Bà, that have permanent inhabitants, as well as tourist facilities including hotels and beaches. There are a number of beautiful beaches on the smaller islands.

 

A community of around 1,600 people live on Hạ Long Bay in four fishing villages: Cửa Vạn, Ba Hang, Cống Tàu and Vông Viêng in Hùng Thắng commune, Hạ Long city. They live on floating houses and are sustained through fishing and marine aquaculture (cultivating marine biota), plying the shallow waters for 200 species of fish and 450 different kinds of mollusks. Many of the islands have acquired their names as a result of interpretation of their unusual shapes. Such names include Voi Islet (elephant), Ga Choi Islet (fighting cock), Khi Islet (monkey), and Mai Nha Islet (roof). 989 of the islands have been given names. Birds and animals including bantams, antelopes, monkeys, and lizard also live on some of the islands.

 

Almost all these islands are as individual towers in a classic fenglin landscape with heights from 50m to 100m, and height/width ratios of up to about six.

 

Another specific feature of Halong Bay is the abundance of lakes inside the limestone islands. For example, Dau Be island has six enclosed lakes. All these island lakes occupy drowned dolines within fengcong karst.

 

LOCATION

Hạ Long Bay is located in northeastern Vietnam, from E106°56' to E107°37' and from N20°43' to N21°09'. The bay stretches from Yên Hưng district, past Hạ Long city, Cẩm Phả town to Vân Đồn District, bordered on the south and southeast by the Gulf of Tonkin, on the north by China, and on the west and southwest by Cát Bà Island. The bay has a 120 km long coastline and is approximately 1,553 km² in size with about 2,000 islets. The area designated by UNESCO as the World Natural Heritage Site incorporates 434 km² with 775 islets, of which the core zone is delimited by 69 points: Đầu Gỗ island on the west, Ba Hầm lake on the south and Cống Tây island on the east. The protected area is from the Cái Dăm petrol store to Quang Hanh commune, Cẩm Phả town and the surrounding zone.

 

CLIMATE

The climate of the bay is tropical, wet, sea islands, with two seasons: hot and moist summer, and dry and cold winter. The average temperature is from 15 °C- 25 °C, and annual rainfall is between 2 meters and 2.2 meters. Hạ Long Bay has the typical diurnal tide system (tide amplitude ranges from 3.5-4m). The salinity is from 31 to 34.5MT in the dry season and lower in the rainy season.

 

HISTORY

SOI NHU CULTURE (16,000–5000 BC)

Located in Hạ Long and Bái Tử Long are archaeological sites such as Mê Cung and Thiên Long. There are remains from mounds of mountain shellfish (Cyclophorus), spring shellfish (Melania), some fresh water mollusc and some rudimentary labour tools. The main way of life of Soi Nhụ's inhabitants included catching fish and shellfish, collecting fruits and digging for bulbs and roots. Their living environment was a coastal area unlike other Vietnamese cultures, for example, like those found in Hòa Bình and Bắc Sơn.

 

CAI BEO CULTURE (5000–3000 BC)

Located in Hạ Long and Cát Bà island, its inhabitants developed to the level of sea exploitation. Cái Bèo culture is a link between Soi Nhụ culture and Hạ Long culture.

 

FEUDAL PERIOD

History shows that Hạ Long Bay was the setting for local naval battles against Vietnam's coastal neighbors. On three occasions, in the labyrinth of channels in Bạch Đằng River near the islands, the Vietnamese army stopped the Chinese from landing. In 1288, General Trần Hưng Đạo stopped Mongol ships from sailing up the nearby Bạch Đằng River by placing steel-tipped wooden stakes at high tide, sinking the Mongol Kublai Khan's fleet.

 

During the Vietnam War, many of the channels between the islands were heavily mined by the United States navy, some of which pose a threat to shipping to this day.

 

GEOLOGY AND GEOMORPHOLOGY

In 2000, the UNESCO’s World Heritage Committee has inscribed the Hạ Long Bay in the World Heritage List according to its outstanding examples representing major stages of the Earth’s history and its original limestone karstic geomorphologic features. The Hạ Long Bay and its adjacent areas consist of a part of the Sino-Vietnamese composite terrane having its development history from pre-Cambrian up to present day. During Phanerozoic, terrigenous, volcanogenic and cherty-carbonate sediments containing in abundance graptolites, brachiopods, fishes, corals, foraminiferas, radiolarias, bivalves and flora, separated one from another by 10 stratigraphic gaps, but the boundary between Devonian and Carboniferous has been considered as continuous. The limestone karstic geomorphology of the bay was developed since Miocene, especially the cone-shaped hills (fengcong), or isolated high limestone karst towers (fenglin) with many remnants of old phreatic caves, old karstic foot caves, marine notch caves form magnificent limestone karst landforms as unique on the world. The Quaternary geology was developed through 5 cycles with the intercalation of marine and continental environments. The present Hạ Long Bay, in fact, appeared after the Middle Holocene maximum transgression, leaving ultimate zone of lateral undercutting in the limestone cliffs bearing many shells of oysters, having the 14C age as 2280 to >40,000 y. BP. Geological resources are abundant: anthracite, lignite, oil shale, petroleum, phosphate, limestone and cement additives, kaolin, silica sand, dolomite, quartzite of exogenous origin, and antimony, mercury of hydrothermal origin. Besides, there still are surface water, groundwater and thermal mineral water on the shore of the Hạ Long - Bái Tử Long Bays and other environmental resources.

 

In terms of marine geology, this area is recorded as an especially coastal sedimentary environment. In the alkaline seawater environment, the chemical denudation process of calcium carbonate proceeds rapidly, creating wide, strangely shaped marine notches.

 

The bottom surface sediments are various from clay mud to sand, however, silty mud and clay mud are dominated in distribution. Especially, the carbonate materials originated from organisms make up from 60-65% sedimentary content. The surface sediments of coral reefs are mainly sand and pebbles of which the carbonate materials occupy for more than 90%. The intertidal zone sediments are various from clay mud to sand and gravel depending to distinguished sedimentary environments such as mangrove marshes, tidal flats, beaches etc. At the small, but wonderfully beautiful beaches, the sand sediments may be dominated quartz or carbonate materials.

 

The sediment layers of intertidal zone, the upper sea bed with a plain surface conserving ancient rivers, systems of caves and it's sediments, traces of ancient marine action forming distinctive notches, beaches and marine terraces, mangrove swamps are important evidence of geological events and processes taking place during Quaternary.

 

HISTORY OF TECTONICS

Hạ Long Bay has experienced at least 500 million years in various geological states of orogeny, marine transgression and marine regression. During the Ordovician and Silurian periods (500-410 million years ago), Hạ Long Bay was deep sea. During the Carboniferous and Permian periods (340-250 million years ago), Hạ Long Bay was at shallow sea level.

 

The dominated uplift movement of neotectonic and recent tectonic influenced deeply on topography of this area, and the present landscape of sea-islands was formed around 7 or 8 thousand years ago by the sea invasion during Holocene transgression begun at about 17-18 thousand years ago. Particularly from the Holocene time, from about 11,000 years ago Cat Ba - Hạ Long area has much archaeological evidence connecting variations in sea levels with the development of ancient cultures such as the Soi Nhu and Ha Long cultures.

 

KARST GEOMORPHOLOGY VALUE

Due to a simultaneous combination of ideal factors such as thick, pale, grey, and strong limestone layers, which are formed by fine-grained materials; hot and moist climate and slow tectonic process as a whole; Hạ Long Bay has had a complete karst evolution for 20 million years. There are many types of karst topography in the bay, such as karst field.

 

Hạ Long Bay is a mature karst landscape developed during a warm, wet, tropical climate. The sequence of stages in the evolution of a karst landscape over a period of 20 million years requires a combination of several distinct elements including a massive thickness of limestone, a hot wet climate and slow overall tectonic up lift. The process of karst formation is divided into five stage is the formation of the distinctive do line karst. This is followed by the development of fengcong karst can be seen in the groups of hills on Bo Hon and Dau Be Inland. These cones with sloping side average 100m in height with the tallest exceeding 200m. Fenglin karst is characterised by steep separate towers. The hundreds of rocky islands with form the beautiful and famous landscape of the Bay are the individual towers of a classic Fenglin landscape where the intervening plains have been submerged by the sea. Most towers reach a height of between 50 and 100m with a height to width ratio of about 6. The karst dolines were flooded by the sea becoming the abundance of lakes that lie within the limestone islands. For example, Dau Be island at the mouth of the Bay has six enclosed lakes including those of the Ba Ham lakes lying within its fencong karst. The Bay contains examples of the landscape elements of fengcong, fenglin and karst plain. These are not separate evolutionary stages but the result of natural non – uniform processes in the denudation of a large mass of limestone. Marine erosion created the notches which in some places have been enlarged into caves. The marine notch is a feature of limestone coastline but, in Ha Long Bay, it has created the mature landscape.

 

Within Ha Long Bay, the main accessible caves are the older passages that survive from the time when the karst was evolving though its various stages of fengcong and fenglin. Three main types of caves can be recognized in the limestone islands (Waltham, T. 1998):

 

Remnants of old phreatic caves

Old karstic foot caves

Marine notch caves

 

The first group of caves is old phreatic caves which include Sung Sot, Tam Cung, Lau Dai, Thien Cung, Dau Go, Hoang Long, Thien Long. Nowadays, these caves lie at various high levels. Sung Sot cave is on Bo Hon island. From its truncated entrance chambers on allege high on the cliff, a passage of more that 10m high and wide descends to the south. Tam Cung is a large phreatic fissure cave that developed in the bedding planes of the limestone dividing the fissure cave into three chambers. Lau Dai is a cave with a complex of passages extending over 300m opening on the south side of Con Ngua island. Thien Cung and Dau Go are remnants of the same old cave system. They both survive in the northern part of Dau Go island at between 20 and 50m above sea level. Thien Cung has one large chamber more that 100m long, blocked at its ends and almost subdivided into smaller chambers by massive wall of stalactites and stalagmites. Dau Go is a single large tunnel descending along a major set of fractures to a massive choke.

 

The second group of caves is the old karstic foot caves which include Trinh Lu, Bo Nau, Tien Ong and Trong caves. Foot caves are a ubiquitous feature of karst landscapes which have reached a stage of widespread lateral undercutting at base level. They may extend back into maze caves of stream caves draining from larger cave systems within the limestone. They are distinguished by the main elements of their passages being close to the horizontal and are commonly related to denuded or accumulated terraces at the old base levels. Trinh Nu, which is one of the larger foot caves in Ha Long Bay with its ceiling at about 12m above sea level and about 80m in length, was developed in multiple stages. Bo Nau, a horizontal cave containing old stalactite deposits, cuts across the 25o dip of the bedding plane.

 

The third group is the marine notch caves that are a special feature of the karst of Ha Long Bay. The dissolution process of sea water acting on the limestone and erosion by wave action crates notches at the base of the cliffs. In advantageous conditions, dissolution of the limestone allows the cliff notches to be steadily deepened and extended into caves. Many of these at sea level extend right though the limestone hills into drowned dolines which are now tidal lakes.

 

A distinguishing feature of marine notch caves is an absolutely smooth and horizontal ceiling cut through the limestone. Some marine notch caves had been not formed at present sea level, but old sea levels related to sea level changes in Holocene transgression, event to Pleistocene sea levels. Some of them passed preserved the development of old karstic foot cave in mainland environment or preserved the remnants of older phreatic caves. One of the most unusual features of Ha Long Bay is the Bo Ham lake group of hidden lakes and their connecting tunnel – notch caves in Dau Be island. From the island’s perimeter cliff a cave, 10m wide at water level and curving so that it is almost completely dark, extends about 150m to Lake 1. Luon cave is on Bo Hon island and extends 50m though to an enclosed tidal lake. It has a massive stalactite hanging 2m down and truncated at the modern tidal level. It has passed though many stages in its formation.

 

The karst landscape of Ha Long Bay is of international significance and of fundamental importance to the science of geomorphology. The fenglin tower karst, which is the type present in much of Ha Long Bay, is the most extreme form of limestone landscape development. If these karst landscapes are broadly compared in terms of their height, steepness and number of their limestone towers, Ha Long Bay is probably second in the entire world only to Yangshou, in China. However, Ha Long Bay ha also been invaded by the sea so that the geomorphology of its limestone is lands are, at least in part, the consequence of marine erosion. The marine invasion distinguishes Ha Long Bay and makes it unique in the world. There are other areas of submerged karst towers which were invaded by the sea, but none is as extensive as Ha Long Bay.

 

TIMELINE OF GEOLOGIC EVOLUTION

Some of the most remarkable geological events in Hạ Long Bay's history have occurred in the last 1,000 years, include the advance of the sea, the raising of the bay area, strong erosion that has formed coral, and, pure blue and heavily salted water. This process of erosion by seawater has deeply engraved the stone, contributing to its fantastic beauty. Present-day Hạ Long Bay is the result of this long process of geological evolution that has been influenced by so many factors.

 

Due to all these factors, tourists visiting Hạ Long Bay are not only treated to one of the natural wonders of the world, but also to a precious geological museum that has been naturally preserved in the open air for the last 300 million years.

 

ECOLOGY

Halong Bay is host to two ecosystems: a tropical, moist, evergreen rainforest ecosystem; and a marine and coastal ecosystem. The bay is home to seven endemic species: Livistona halongensis, Impatiens halongensis, Chirita halongensis, Chirita hiepii, Chirita modesta, Paraboea halongensis and Alpinia calcicola.

 

The many islands that dot the bay are home to a great many other species, including (but likely not limited to): 477 magnoliales, 12 pteris, 20 salt marsh flora; and 4 amphibia, 10 reptilia, 40 aves, and 4 mammalia.

 

Common aquatic species found in the bay include: cuttlefish (mực); oyster (hào); cyclinae (ngán); prawns (penaeidea (tôm he), panulirus (tôm hùm), parapenaeopsis (tôm sắt), etc.); sipunculoideas (sá sùng); nerita (ốc đĩa); charonia tritonis (ốc tù và); and cà sáy.

 

ENVIRONMENTAL DAAGE

With an increasing tourist trade, mangroves and seagrass beds have been cleared and jetties and wharves have been built for tourist boats.

 

Game fishing, often near coral reefs, is threatening many endangered species of fish.

 

Local government and businesses are aware of problems and many measures have been taken to minimize tourism affect to the bay environment for sustainable economic growth like introducing eco friendly tours and introducing tight waste control on resorts.

 

AWARDS AND DESIGNATIONS

In 1962, the Vietnam Ministry of Culture, Sport and Tourism designated Hạ Long Bay a 'Renowned National Landscape Monument'.

 

Hạ Long Bay was first listed as a UNESCO World Heritage Site in 1994, in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognised Hạ Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated.

 

In October 2011, World Monuments Fund included the bay on the 2012 World Monuments Watch, citing tourism pressures and associated development as threats to the site that must be addressed. The goal of Watch-listing is to promote strategies of responsible heritage-driven development for a sustainable future.

 

In 2012, New 7 Wonders Foundation officially named Halong Bay as one of New Seven Natural Wonders of the world.

 

Hạ Long Bay is also a member of the Club of the Most Beautiful Bays of the World.

 

IN LITERATURE

In writings about Hạ Long Bay, the following Vietnamese writers said:

 

Nguyễn Trãi: "This wonder is ground raising up into the middle of the high sky".

Xuân Diệu: "Here is the unfinished works of the Beings...Here is the stones which the Giant played and threw away".

Nguyên Ngọc: "...to form this first- rate wonder, nature only uses: Stone and Water...There are just only two materials themselves chosen from as much as materials, in order to write, to draw, to sculpture, to create everything...It is quite possible that here is the image of the future world".

Ho Chi Minh: "It is the wonder that one cannot impart to others".

Phạm Văn Đồng: "Is it one scenery or many sceneries? Is it the scenery in the world or somewhere?".

Nguyễn Tuân: "Only mountains accept to be old, but Hạ Long sea and wave are young for ever".

Huy Cận: "Night breathes, stars wave Hạ Long's water".

Chế Lan Viên:

 

"Hạ Long, Bái Tử Long- Dragons were hidden, only stones still remain

On the moonlight nights, stones meditate as men do..."

Lord Trịnh Cương overflowed with emotion: "Mountains are glistened by water shadow, water spills all over the sky".

 

ANCIENT TALES

Hạ Long bay's inhabitants have developed numerous tales explaining names given to various isles and caves in the bay.

 

Đầu Gỗ cave (literally: "the end of wooden bars" cave): these wooden bars in this cave are the remnants of sharped wooden columns built under the water level by the order of Trần Hưng Đạo commander in order to sink Mongolian invaders' ships in the 13th century.

Kim Quy cave (literally: "Golden Turtle" cave): it is told that the Golden Turtle swam toward the Eastern Sea (international name: South China Sea) after returning the holy sword which had assisted King Lê Thái Tổ in the combat against Ming invaders from China. Next, with the approval of the Sea King, Golden Turtle continued to fight against monsters in this marine area. The turtle became exhausted and died in a cave. Consequently, the cave was named after the Golden Turtle.

Con Cóc isle (literally: Frog isle): is a frog- like isle. According to ancient tales, in a year of severe drought, a frog directed all animals to the Heaven and protested against the God. They demonstrated in favour of making rain. As a result, the God must accept the frog as his uncle. Since then, whenever frogs grind their teeth, the God has to pour water down the ground.

 

WIKIPEDIA

Hạ Long Bay (Vietnamese: Vịnh Hạ Long, About this sound listen, literally: "descending dragon bay") is a UNESCO World Heritage Site, and a popular travel destination, in Quảng Ninh Province, Vietnam. Administratively, the bay belongs to Hạ Long City, Cẩm Phả town, and the part of Vân Đồn District. The bay features thousands of limestone karsts and isles in various sizes and shapes. Hạ Long Bay is a center of a larger zone which includes Bái Tử Long bay to the northeast, and Cát Bà islands to the southwest. These larger zones share similar geological, geographical, geomorphological, climate, and cultural characters.

 

Hạ Long Bay has an area of around 1,553 km2, including 1,960–2,000 islets, most of which are limestone. The core of the bay has an area of 334 km2 with a high density of 775 islets. The limestone in this bay has gone through 500 million years of formation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years under the impact of the tropical wet climate. The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. Hạ Long Bay is home to 14 endemic floral species and 60 endemic faunal species.

 

Historical research surveys have shown the presence of prehistorical human beings in this area tens of thousands years ago. The successive ancient cultures are the Soi Nhụ culture around 18,000–7000 BC, the Cái Bèo culture 7000–5000 BC and the Hạ Long culture 5,000–3,500 years ago. Hạ Long Bay also marked important events in the history of Vietnam with many artifacts found in Bài Thơ Mount, Đầu Gỗ Cave, Bãi Cháy.

 

500 years ago, Nguyễn Trãi praised the beauty of Hạ Long Bay in his verse Lộ nhập Vân Đồn, in which he called it "rock wonder in the sky".[8] In 1962, the Ministry of Culture, Sports and Tourism of North Vietnam listed Hạ Long Bay in the National Relics and Landscapes publication. In 1994, the core zone of Hạ Long Bay was listed by UNESCO as a World Heritage Site according to criterion vii, and listed for a second time according to criterion viii.

 

ETYMOLOGY

The name Hạ Long is derived from the Sino-Vietnamese 下龍, meaning "descending dragon".

 

Before 19th century, the name Halong Bay had not been recorded in the old books of our country. It has been called An Bang, Luc Thuy, Van Don... Late 19th century, the name Halong Bay has appeared on the Maritime map of France. "Haiphong News" published in French, has reported: " Dragon appears on Halong Bay". The story can be summarized as follows: In 1898, lieutenant Lagoredin captain of Avalangso met a couple of giant sea snake on Halong Bay three times. Not only the lieutenant but also many other sailors saw those species. The European thought that those animals looked like Asian dragon. Maybe the appearance of strange animals led to the name of Quang Ninh sea area today: Halong Bay

 

According to local legend, when Vietnam had just started to develop into a country, they had to fight against invaders. To assist the Vietnamese in defending their country, the gods sent a family of dragons as protectors. This family of dragons began spitting out jewels and jade. These jewels turned into the islands and islets dotting the bay, linking together to form a great wall against the invaders. Under magics, numerous rock mountains abruptly appeared on the sea, ahead of invaders' ships; the forward ships struck the rocks and each other. After winning the battle, the dragons were interested in peaceful sightseeing of the Earth, and then decided to live in this bay. The place where the mother dragon descended was named Hạ Long, the place where the dragon's children attended upon their mother was called Bái Tử Long island (Bái: attend upon, Tử: children, Long: dragon), and the place where the dragon's children wriggled their tails violently was called Bạch Long Vỹ island (Bạch: white-color of the foam made when Dragon's children wriggled, Long: dragon, Vỹ: tail), present day Trà Cổ peninsula, Móng Cái.

 

OVERVIEW

The bay consists of a dense cluster of some 1,600 limestone monolithic islands each topped with thick jungle vegetation, rising spectacularly from the ocean. Several of the islands are hollow, with enormous caves. Hang Đầu Gỗ (Wooden stakes cave) is the largest grotto in the Hạ Long area. French tourists visited in the late 19th century, and named the cave Grotte des Merveilles. Its three large chambers contain large numerous stalactites and stalagmites (as well as 19th century French graffiti). There are two bigger islands, Tuần Châu and Cát Bà, that have permanent inhabitants, as well as tourist facilities including hotels and beaches. There are a number of beautiful beaches on the smaller islands.

 

A community of around 1,600 people live on Hạ Long Bay in four fishing villages: Cửa Vạn, Ba Hang, Cống Tàu and Vông Viêng in Hùng Thắng commune, Hạ Long city. They live on floating houses and are sustained through fishing and marine aquaculture (cultivating marine biota), plying the shallow waters for 200 species of fish and 450 different kinds of mollusks. Many of the islands have acquired their names as a result of interpretation of their unusual shapes. Such names include Voi Islet (elephant), Ga Choi Islet (fighting cock), Khi Islet (monkey), and Mai Nha Islet (roof). 989 of the islands have been given names. Birds and animals including bantams, antelopes, monkeys, and lizard also live on some of the islands.

 

Almost all these islands are as individual towers in a classic fenglin landscape with heights from 50m to 100m, and height/width ratios of up to about six.

 

Another specific feature of Halong Bay is the abundance of lakes inside the limestone islands. For example, Dau Be island has six enclosed lakes. All these island lakes occupy drowned dolines within fengcong karst.

 

LOCATION

Hạ Long Bay is located in northeastern Vietnam, from E106°56' to E107°37' and from N20°43' to N21°09'. The bay stretches from Yên Hưng district, past Hạ Long city, Cẩm Phả town to Vân Đồn District, bordered on the south and southeast by the Gulf of Tonkin, on the north by China, and on the west and southwest by Cát Bà Island. The bay has a 120 km long coastline and is approximately 1,553 km² in size with about 2,000 islets. The area designated by UNESCO as the World Natural Heritage Site incorporates 434 km² with 775 islets, of which the core zone is delimited by 69 points: Đầu Gỗ island on the west, Ba Hầm lake on the south and Cống Tây island on the east. The protected area is from the Cái Dăm petrol store to Quang Hanh commune, Cẩm Phả town and the surrounding zone.

 

CLIMATE

The climate of the bay is tropical, wet, sea islands, with two seasons: hot and moist summer, and dry and cold winter. The average temperature is from 15 °C- 25 °C, and annual rainfall is between 2 meters and 2.2 meters. Hạ Long Bay has the typical diurnal tide system (tide amplitude ranges from 3.5-4m). The salinity is from 31 to 34.5MT in the dry season and lower in the rainy season.

 

HISTORY

SOI NHU CULTURE (16,000–5000 BC)

Located in Hạ Long and Bái Tử Long are archaeological sites such as Mê Cung and Thiên Long. There are remains from mounds of mountain shellfish (Cyclophorus), spring shellfish (Melania), some fresh water mollusc and some rudimentary labour tools. The main way of life of Soi Nhụ's inhabitants included catching fish and shellfish, collecting fruits and digging for bulbs and roots. Their living environment was a coastal area unlike other Vietnamese cultures, for example, like those found in Hòa Bình and Bắc Sơn.

 

CAI BEO CULTURE (5000–3000 BC)

Located in Hạ Long and Cát Bà island, its inhabitants developed to the level of sea exploitation. Cái Bèo culture is a link between Soi Nhụ culture and Hạ Long culture.

 

FEUDAL PERIOD

History shows that Hạ Long Bay was the setting for local naval battles against Vietnam's coastal neighbors. On three occasions, in the labyrinth of channels in Bạch Đằng River near the islands, the Vietnamese army stopped the Chinese from landing. In 1288, General Trần Hưng Đạo stopped Mongol ships from sailing up the nearby Bạch Đằng River by placing steel-tipped wooden stakes at high tide, sinking the Mongol Kublai Khan's fleet.

 

During the Vietnam War, many of the channels between the islands were heavily mined by the United States navy, some of which pose a threat to shipping to this day.

 

GEOLOGY AND GEOMORPHOLOGY

In 2000, the UNESCO’s World Heritage Committee has inscribed the Hạ Long Bay in the World Heritage List according to its outstanding examples representing major stages of the Earth’s history and its original limestone karstic geomorphologic features. The Hạ Long Bay and its adjacent areas consist of a part of the Sino-Vietnamese composite terrane having its development history from pre-Cambrian up to present day. During Phanerozoic, terrigenous, volcanogenic and cherty-carbonate sediments containing in abundance graptolites, brachiopods, fishes, corals, foraminiferas, radiolarias, bivalves and flora, separated one from another by 10 stratigraphic gaps, but the boundary between Devonian and Carboniferous has been considered as continuous. The limestone karstic geomorphology of the bay was developed since Miocene, especially the cone-shaped hills (fengcong), or isolated high limestone karst towers (fenglin) with many remnants of old phreatic caves, old karstic foot caves, marine notch caves form magnificent limestone karst landforms as unique on the world. The Quaternary geology was developed through 5 cycles with the intercalation of marine and continental environments. The present Hạ Long Bay, in fact, appeared after the Middle Holocene maximum transgression, leaving ultimate zone of lateral undercutting in the limestone cliffs bearing many shells of oysters, having the 14C age as 2280 to >40,000 y. BP. Geological resources are abundant: anthracite, lignite, oil shale, petroleum, phosphate, limestone and cement additives, kaolin, silica sand, dolomite, quartzite of exogenous origin, and antimony, mercury of hydrothermal origin. Besides, there still are surface water, groundwater and thermal mineral water on the shore of the Hạ Long - Bái Tử Long Bays and other environmental resources.

 

In terms of marine geology, this area is recorded as an especially coastal sedimentary environment. In the alkaline seawater environment, the chemical denudation process of calcium carbonate proceeds rapidly, creating wide, strangely shaped marine notches.

 

The bottom surface sediments are various from clay mud to sand, however, silty mud and clay mud are dominated in distribution. Especially, the carbonate materials originated from organisms make up from 60-65% sedimentary content. The surface sediments of coral reefs are mainly sand and pebbles of which the carbonate materials occupy for more than 90%. The intertidal zone sediments are various from clay mud to sand and gravel depending to distinguished sedimentary environments such as mangrove marshes, tidal flats, beaches etc. At the small, but wonderfully beautiful beaches, the sand sediments may be dominated quartz or carbonate materials.

 

The sediment layers of intertidal zone, the upper sea bed with a plain surface conserving ancient rivers, systems of caves and it's sediments, traces of ancient marine action forming distinctive notches, beaches and marine terraces, mangrove swamps are important evidence of geological events and processes taking place during Quaternary.

 

HISTORY OF TECTONICS

Hạ Long Bay has experienced at least 500 million years in various geological states of orogeny, marine transgression and marine regression. During the Ordovician and Silurian periods (500-410 million years ago), Hạ Long Bay was deep sea. During the Carboniferous and Permian periods (340-250 million years ago), Hạ Long Bay was at shallow sea level.

 

The dominated uplift movement of neotectonic and recent tectonic influenced deeply on topography of this area, and the present landscape of sea-islands was formed around 7 or 8 thousand years ago by the sea invasion during Holocene transgression begun at about 17-18 thousand years ago. Particularly from the Holocene time, from about 11,000 years ago Cat Ba - Hạ Long area has much archaeological evidence connecting variations in sea levels with the development of ancient cultures such as the Soi Nhu and Ha Long cultures.

 

KARST GEOMORPHOLOGY VALUE

Due to a simultaneous combination of ideal factors such as thick, pale, grey, and strong limestone layers, which are formed by fine-grained materials; hot and moist climate and slow tectonic process as a whole; Hạ Long Bay has had a complete karst evolution for 20 million years. There are many types of karst topography in the bay, such as karst field.

 

Hạ Long Bay is a mature karst landscape developed during a warm, wet, tropical climate. The sequence of stages in the evolution of a karst landscape over a period of 20 million years requires a combination of several distinct elements including a massive thickness of limestone, a hot wet climate and slow overall tectonic up lift. The process of karst formation is divided into five stage is the formation of the distinctive do line karst. This is followed by the development of fengcong karst can be seen in the groups of hills on Bo Hon and Dau Be Inland. These cones with sloping side average 100m in height with the tallest exceeding 200m. Fenglin karst is characterised by steep separate towers. The hundreds of rocky islands with form the beautiful and famous landscape of the Bay are the individual towers of a classic Fenglin landscape where the intervening plains have been submerged by the sea. Most towers reach a height of between 50 and 100m with a height to width ratio of about 6. The karst dolines were flooded by the sea becoming the abundance of lakes that lie within the limestone islands. For example, Dau Be island at the mouth of the Bay has six enclosed lakes including those of the Ba Ham lakes lying within its fencong karst. The Bay contains examples of the landscape elements of fengcong, fenglin and karst plain. These are not separate evolutionary stages but the result of natural non – uniform processes in the denudation of a large mass of limestone. Marine erosion created the notches which in some places have been enlarged into caves. The marine notch is a feature of limestone coastline but, in Ha Long Bay, it has created the mature landscape.

 

Within Ha Long Bay, the main accessible caves are the older passages that survive from the time when the karst was evolving though its various stages of fengcong and fenglin. Three main types of caves can be recognized in the limestone islands (Waltham, T. 1998):

 

Remnants of old phreatic caves

Old karstic foot caves

Marine notch caves

 

The first group of caves is old phreatic caves which include Sung Sot, Tam Cung, Lau Dai, Thien Cung, Dau Go, Hoang Long, Thien Long. Nowadays, these caves lie at various high levels. Sung Sot cave is on Bo Hon island. From its truncated entrance chambers on allege high on the cliff, a passage of more that 10m high and wide descends to the south. Tam Cung is a large phreatic fissure cave that developed in the bedding planes of the limestone dividing the fissure cave into three chambers. Lau Dai is a cave with a complex of passages extending over 300m opening on the south side of Con Ngua island. Thien Cung and Dau Go are remnants of the same old cave system. They both survive in the northern part of Dau Go island at between 20 and 50m above sea level. Thien Cung has one large chamber more that 100m long, blocked at its ends and almost subdivided into smaller chambers by massive wall of stalactites and stalagmites. Dau Go is a single large tunnel descending along a major set of fractures to a massive choke.

 

The second group of caves is the old karstic foot caves which include Trinh Lu, Bo Nau, Tien Ong and Trong caves. Foot caves are a ubiquitous feature of karst landscapes which have reached a stage of widespread lateral undercutting at base level. They may extend back into maze caves of stream caves draining from larger cave systems within the limestone. They are distinguished by the main elements of their passages being close to the horizontal and are commonly related to denuded or accumulated terraces at the old base levels. Trinh Nu, which is one of the larger foot caves in Ha Long Bay with its ceiling at about 12m above sea level and about 80m in length, was developed in multiple stages. Bo Nau, a horizontal cave containing old stalactite deposits, cuts across the 25o dip of the bedding plane.

 

The third group is the marine notch caves that are a special feature of the karst of Ha Long Bay. The dissolution process of sea water acting on the limestone and erosion by wave action crates notches at the base of the cliffs. In advantageous conditions, dissolution of the limestone allows the cliff notches to be steadily deepened and extended into caves. Many of these at sea level extend right though the limestone hills into drowned dolines which are now tidal lakes.

 

A distinguishing feature of marine notch caves is an absolutely smooth and horizontal ceiling cut through the limestone. Some marine notch caves had been not formed at present sea level, but old sea levels related to sea level changes in Holocene transgression, event to Pleistocene sea levels. Some of them passed preserved the development of old karstic foot cave in mainland environment or preserved the remnants of older phreatic caves. One of the most unusual features of Ha Long Bay is the Bo Ham lake group of hidden lakes and their connecting tunnel – notch caves in Dau Be island. From the island’s perimeter cliff a cave, 10m wide at water level and curving so that it is almost completely dark, extends about 150m to Lake 1. Luon cave is on Bo Hon island and extends 50m though to an enclosed tidal lake. It has a massive stalactite hanging 2m down and truncated at the modern tidal level. It has passed though many stages in its formation.

 

The karst landscape of Ha Long Bay is of international significance and of fundamental importance to the science of geomorphology. The fenglin tower karst, which is the type present in much of Ha Long Bay, is the most extreme form of limestone landscape development. If these karst landscapes are broadly compared in terms of their height, steepness and number of their limestone towers, Ha Long Bay is probably second in the entire world only to Yangshou, in China. However, Ha Long Bay ha also been invaded by the sea so that the geomorphology of its limestone is lands are, at least in part, the consequence of marine erosion. The marine invasion distinguishes Ha Long Bay and makes it unique in the world. There are other areas of submerged karst towers which were invaded by the sea, but none is as extensive as Ha Long Bay.

 

TIMELINE OF GEOLOGIC EVOLUTION

Some of the most remarkable geological events in Hạ Long Bay's history have occurred in the last 1,000 years, include the advance of the sea, the raising of the bay area, strong erosion that has formed coral, and, pure blue and heavily salted water. This process of erosion by seawater has deeply engraved the stone, contributing to its fantastic beauty. Present-day Hạ Long Bay is the result of this long process of geological evolution that has been influenced by so many factors.

 

Due to all these factors, tourists visiting Hạ Long Bay are not only treated to one of the natural wonders of the world, but also to a precious geological museum that has been naturally preserved in the open air for the last 300 million years.

 

ECOLOGY

Halong Bay is host to two ecosystems: a tropical, moist, evergreen rainforest ecosystem; and a marine and coastal ecosystem. The bay is home to seven endemic species: Livistona halongensis, Impatiens halongensis, Chirita halongensis, Chirita hiepii, Chirita modesta, Paraboea halongensis and Alpinia calcicola.

 

The many islands that dot the bay are home to a great many other species, including (but likely not limited to): 477 magnoliales, 12 pteris, 20 salt marsh flora; and 4 amphibia, 10 reptilia, 40 aves, and 4 mammalia.

 

Common aquatic species found in the bay include: cuttlefish (mực); oyster (hào); cyclinae (ngán); prawns (penaeidea (tôm he), panulirus (tôm hùm), parapenaeopsis (tôm sắt), etc.); sipunculoideas (sá sùng); nerita (ốc đĩa); charonia tritonis (ốc tù và); and cà sáy.

 

ENVIRONMENTAL DAAGE

With an increasing tourist trade, mangroves and seagrass beds have been cleared and jetties and wharves have been built for tourist boats.

 

Game fishing, often near coral reefs, is threatening many endangered species of fish.

 

Local government and businesses are aware of problems and many measures have been taken to minimize tourism affect to the bay environment for sustainable economic growth like introducing eco friendly tours and introducing tight waste control on resorts.

 

AWARDS AND DESIGNATIONS

In 1962, the Vietnam Ministry of Culture, Sport and Tourism designated Hạ Long Bay a 'Renowned National Landscape Monument'.

 

Hạ Long Bay was first listed as a UNESCO World Heritage Site in 1994, in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognised Hạ Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated.

 

In October 2011, World Monuments Fund included the bay on the 2012 World Monuments Watch, citing tourism pressures and associated development as threats to the site that must be addressed. The goal of Watch-listing is to promote strategies of responsible heritage-driven development for a sustainable future.

 

In 2012, New 7 Wonders Foundation officially named Halong Bay as one of New Seven Natural Wonders of the world.

 

Hạ Long Bay is also a member of the Club of the Most Beautiful Bays of the World.

 

IN LITERATURE

In writings about Hạ Long Bay, the following Vietnamese writers said:

 

Nguyễn Trãi: "This wonder is ground raising up into the middle of the high sky".

Xuân Diệu: "Here is the unfinished works of the Beings...Here is the stones which the Giant played and threw away".

Nguyên Ngọc: "...to form this first- rate wonder, nature only uses: Stone and Water...There are just only two materials themselves chosen from as much as materials, in order to write, to draw, to sculpture, to create everything...It is quite possible that here is the image of the future world".

Ho Chi Minh: "It is the wonder that one cannot impart to others".

Phạm Văn Đồng: "Is it one scenery or many sceneries? Is it the scenery in the world or somewhere?".

Nguyễn Tuân: "Only mountains accept to be old, but Hạ Long sea and wave are young for ever".

Huy Cận: "Night breathes, stars wave Hạ Long's water".

Chế Lan Viên:

 

"Hạ Long, Bái Tử Long- Dragons were hidden, only stones still remain

On the moonlight nights, stones meditate as men do..."

Lord Trịnh Cương overflowed with emotion: "Mountains are glistened by water shadow, water spills all over the sky".

 

ANCIENT TALES

Hạ Long bay's inhabitants have developed numerous tales explaining names given to various isles and caves in the bay.

 

Đầu Gỗ cave (literally: "the end of wooden bars" cave): these wooden bars in this cave are the remnants of sharped wooden columns built under the water level by the order of Trần Hưng Đạo commander in order to sink Mongolian invaders' ships in the 13th century.

Kim Quy cave (literally: "Golden Turtle" cave): it is told that the Golden Turtle swam toward the Eastern Sea (international name: South China Sea) after returning the holy sword which had assisted King Lê Thái Tổ in the combat against Ming invaders from China. Next, with the approval of the Sea King, Golden Turtle continued to fight against monsters in this marine area. The turtle became exhausted and died in a cave. Consequently, the cave was named after the Golden Turtle.

Con Cóc isle (literally: Frog isle): is a frog- like isle. According to ancient tales, in a year of severe drought, a frog directed all animals to the Heaven and protested against the God. They demonstrated in favour of making rain. As a result, the God must accept the frog as his uncle. Since then, whenever frogs grind their teeth, the God has to pour water down the ground.

 

WIKIPEDIA

Hạ Long Bay (Vietnamese: Vịnh Hạ Long, About this sound listen, literally: "descending dragon bay") is a UNESCO World Heritage Site, and a popular travel destination, in Quảng Ninh Province, Vietnam. Administratively, the bay belongs to Hạ Long City, Cẩm Phả town, and the part of Vân Đồn District. The bay features thousands of limestone karsts and isles in various sizes and shapes. Hạ Long Bay is a center of a larger zone which includes Bái Tử Long bay to the northeast, and Cát Bà islands to the southwest. These larger zones share similar geological, geographical, geomorphological, climate, and cultural characters.

 

Hạ Long Bay has an area of around 1,553 km2, including 1,960–2,000 islets, most of which are limestone. The core of the bay has an area of 334 km2 with a high density of 775 islets. The limestone in this bay has gone through 500 million years of formation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years under the impact of the tropical wet climate. The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. Hạ Long Bay is home to 14 endemic floral species and 60 endemic faunal species.

 

Historical research surveys have shown the presence of prehistorical human beings in this area tens of thousands years ago. The successive ancient cultures are the Soi Nhụ culture around 18,000–7000 BC, the Cái Bèo culture 7000–5000 BC and the Hạ Long culture 5,000–3,500 years ago. Hạ Long Bay also marked important events in the history of Vietnam with many artifacts found in Bài Thơ Mount, Đầu Gỗ Cave, Bãi Cháy.

 

500 years ago, Nguyễn Trãi praised the beauty of Hạ Long Bay in his verse Lộ nhập Vân Đồn, in which he called it "rock wonder in the sky".[8] In 1962, the Ministry of Culture, Sports and Tourism of North Vietnam listed Hạ Long Bay in the National Relics and Landscapes publication. In 1994, the core zone of Hạ Long Bay was listed by UNESCO as a World Heritage Site according to criterion vii, and listed for a second time according to criterion viii.

 

ETYMOLOGY

The name Hạ Long is derived from the Sino-Vietnamese 下龍, meaning "descending dragon".

 

Before 19th century, the name Halong Bay had not been recorded in the old books of our country. It has been called An Bang, Luc Thuy, Van Don... Late 19th century, the name Halong Bay has appeared on the Maritime map of France. "Haiphong News" published in French, has reported: " Dragon appears on Halong Bay". The story can be summarized as follows: In 1898, lieutenant Lagoredin captain of Avalangso met a couple of giant sea snake on Halong Bay three times. Not only the lieutenant but also many other sailors saw those species. The European thought that those animals looked like Asian dragon. Maybe the appearance of strange animals led to the name of Quang Ninh sea area today: Halong Bay

 

According to local legend, when Vietnam had just started to develop into a country, they had to fight against invaders. To assist the Vietnamese in defending their country, the gods sent a family of dragons as protectors. This family of dragons began spitting out jewels and jade. These jewels turned into the islands and islets dotting the bay, linking together to form a great wall against the invaders. Under magics, numerous rock mountains abruptly appeared on the sea, ahead of invaders' ships; the forward ships struck the rocks and each other. After winning the battle, the dragons were interested in peaceful sightseeing of the Earth, and then decided to live in this bay. The place where the mother dragon descended was named Hạ Long, the place where the dragon's children attended upon their mother was called Bái Tử Long island (Bái: attend upon, Tử: children, Long: dragon), and the place where the dragon's children wriggled their tails violently was called Bạch Long Vỹ island (Bạch: white-color of the foam made when Dragon's children wriggled, Long: dragon, Vỹ: tail), present day Trà Cổ peninsula, Móng Cái.

 

OVERVIEW

The bay consists of a dense cluster of some 1,600 limestone monolithic islands each topped with thick jungle vegetation, rising spectacularly from the ocean. Several of the islands are hollow, with enormous caves. Hang Đầu Gỗ (Wooden stakes cave) is the largest grotto in the Hạ Long area. French tourists visited in the late 19th century, and named the cave Grotte des Merveilles. Its three large chambers contain large numerous stalactites and stalagmites (as well as 19th century French graffiti). There are two bigger islands, Tuần Châu and Cát Bà, that have permanent inhabitants, as well as tourist facilities including hotels and beaches. There are a number of beautiful beaches on the smaller islands.

 

A community of around 1,600 people live on Hạ Long Bay in four fishing villages: Cửa Vạn, Ba Hang, Cống Tàu and Vông Viêng in Hùng Thắng commune, Hạ Long city. They live on floating houses and are sustained through fishing and marine aquaculture (cultivating marine biota), plying the shallow waters for 200 species of fish and 450 different kinds of mollusks. Many of the islands have acquired their names as a result of interpretation of their unusual shapes. Such names include Voi Islet (elephant), Ga Choi Islet (fighting cock), Khi Islet (monkey), and Mai Nha Islet (roof). 989 of the islands have been given names. Birds and animals including bantams, antelopes, monkeys, and lizard also live on some of the islands.

 

Almost all these islands are as individual towers in a classic fenglin landscape with heights from 50m to 100m, and height/width ratios of up to about six.

 

Another specific feature of Halong Bay is the abundance of lakes inside the limestone islands. For example, Dau Be island has six enclosed lakes. All these island lakes occupy drowned dolines within fengcong karst.

 

LOCATION

Hạ Long Bay is located in northeastern Vietnam, from E106°56' to E107°37' and from N20°43' to N21°09'. The bay stretches from Yên Hưng district, past Hạ Long city, Cẩm Phả town to Vân Đồn District, bordered on the south and southeast by the Gulf of Tonkin, on the north by China, and on the west and southwest by Cát Bà Island. The bay has a 120 km long coastline and is approximately 1,553 km² in size with about 2,000 islets. The area designated by UNESCO as the World Natural Heritage Site incorporates 434 km² with 775 islets, of which the core zone is delimited by 69 points: Đầu Gỗ island on the west, Ba Hầm lake on the south and Cống Tây island on the east. The protected area is from the Cái Dăm petrol store to Quang Hanh commune, Cẩm Phả town and the surrounding zone.

 

CLIMATE

The climate of the bay is tropical, wet, sea islands, with two seasons: hot and moist summer, and dry and cold winter. The average temperature is from 15 °C- 25 °C, and annual rainfall is between 2 meters and 2.2 meters. Hạ Long Bay has the typical diurnal tide system (tide amplitude ranges from 3.5-4m). The salinity is from 31 to 34.5MT in the dry season and lower in the rainy season.

 

HISTORY

SOI NHU CULTURE (16,000–5000 BC)

Located in Hạ Long and Bái Tử Long are archaeological sites such as Mê Cung and Thiên Long. There are remains from mounds of mountain shellfish (Cyclophorus), spring shellfish (Melania), some fresh water mollusc and some rudimentary labour tools. The main way of life of Soi Nhụ's inhabitants included catching fish and shellfish, collecting fruits and digging for bulbs and roots. Their living environment was a coastal area unlike other Vietnamese cultures, for example, like those found in Hòa Bình and Bắc Sơn.

 

CAI BEO CULTURE (5000–3000 BC)

Located in Hạ Long and Cát Bà island, its inhabitants developed to the level of sea exploitation. Cái Bèo culture is a link between Soi Nhụ culture and Hạ Long culture.

 

FEUDAL PERIOD

History shows that Hạ Long Bay was the setting for local naval battles against Vietnam's coastal neighbors. On three occasions, in the labyrinth of channels in Bạch Đằng River near the islands, the Vietnamese army stopped the Chinese from landing. In 1288, General Trần Hưng Đạo stopped Mongol ships from sailing up the nearby Bạch Đằng River by placing steel-tipped wooden stakes at high tide, sinking the Mongol Kublai Khan's fleet.

 

During the Vietnam War, many of the channels between the islands were heavily mined by the United States navy, some of which pose a threat to shipping to this day.

 

GEOLOGY AND GEOMORPHOLOGY

In 2000, the UNESCO’s World Heritage Committee has inscribed the Hạ Long Bay in the World Heritage List according to its outstanding examples representing major stages of the Earth’s history and its original limestone karstic geomorphologic features. The Hạ Long Bay and its adjacent areas consist of a part of the Sino-Vietnamese composite terrane having its development history from pre-Cambrian up to present day. During Phanerozoic, terrigenous, volcanogenic and cherty-carbonate sediments containing in abundance graptolites, brachiopods, fishes, corals, foraminiferas, radiolarias, bivalves and flora, separated one from another by 10 stratigraphic gaps, but the boundary between Devonian and Carboniferous has been considered as continuous. The limestone karstic geomorphology of the bay was developed since Miocene, especially the cone-shaped hills (fengcong), or isolated high limestone karst towers (fenglin) with many remnants of old phreatic caves, old karstic foot caves, marine notch caves form magnificent limestone karst landforms as unique on the world. The Quaternary geology was developed through 5 cycles with the intercalation of marine and continental environments. The present Hạ Long Bay, in fact, appeared after the Middle Holocene maximum transgression, leaving ultimate zone of lateral undercutting in the limestone cliffs bearing many shells of oysters, having the 14C age as 2280 to >40,000 y. BP. Geological resources are abundant: anthracite, lignite, oil shale, petroleum, phosphate, limestone and cement additives, kaolin, silica sand, dolomite, quartzite of exogenous origin, and antimony, mercury of hydrothermal origin. Besides, there still are surface water, groundwater and thermal mineral water on the shore of the Hạ Long - Bái Tử Long Bays and other environmental resources.

 

In terms of marine geology, this area is recorded as an especially coastal sedimentary environment. In the alkaline seawater environment, the chemical denudation process of calcium carbonate proceeds rapidly, creating wide, strangely shaped marine notches.

 

The bottom surface sediments are various from clay mud to sand, however, silty mud and clay mud are dominated in distribution. Especially, the carbonate materials originated from organisms make up from 60-65% sedimentary content. The surface sediments of coral reefs are mainly sand and pebbles of which the carbonate materials occupy for more than 90%. The intertidal zone sediments are various from clay mud to sand and gravel depending to distinguished sedimentary environments such as mangrove marshes, tidal flats, beaches etc. At the small, but wonderfully beautiful beaches, the sand sediments may be dominated quartz or carbonate materials.

 

The sediment layers of intertidal zone, the upper sea bed with a plain surface conserving ancient rivers, systems of caves and it's sediments, traces of ancient marine action forming distinctive notches, beaches and marine terraces, mangrove swamps are important evidence of geological events and processes taking place during Quaternary.

 

HISTORY OF TECTONICS

Hạ Long Bay has experienced at least 500 million years in various geological states of orogeny, marine transgression and marine regression. During the Ordovician and Silurian periods (500-410 million years ago), Hạ Long Bay was deep sea. During the Carboniferous and Permian periods (340-250 million years ago), Hạ Long Bay was at shallow sea level.

 

The dominated uplift movement of neotectonic and recent tectonic influenced deeply on topography of this area, and the present landscape of sea-islands was formed around 7 or 8 thousand years ago by the sea invasion during Holocene transgression begun at about 17-18 thousand years ago. Particularly from the Holocene time, from about 11,000 years ago Cat Ba - Hạ Long area has much archaeological evidence connecting variations in sea levels with the development of ancient cultures such as the Soi Nhu and Ha Long cultures.

 

KARST GEOMORPHOLOGY VALUE

Due to a simultaneous combination of ideal factors such as thick, pale, grey, and strong limestone layers, which are formed by fine-grained materials; hot and moist climate and slow tectonic process as a whole; Hạ Long Bay has had a complete karst evolution for 20 million years. There are many types of karst topography in the bay, such as karst field.

 

Hạ Long Bay is a mature karst landscape developed during a warm, wet, tropical climate. The sequence of stages in the evolution of a karst landscape over a period of 20 million years requires a combination of several distinct elements including a massive thickness of limestone, a hot wet climate and slow overall tectonic up lift. The process of karst formation is divided into five stage is the formation of the distinctive do line karst. This is followed by the development of fengcong karst can be seen in the groups of hills on Bo Hon and Dau Be Inland. These cones with sloping side average 100m in height with the tallest exceeding 200m. Fenglin karst is characterised by steep separate towers. The hundreds of rocky islands with form the beautiful and famous landscape of the Bay are the individual towers of a classic Fenglin landscape where the intervening plains have been submerged by the sea. Most towers reach a height of between 50 and 100m with a height to width ratio of about 6. The karst dolines were flooded by the sea becoming the abundance of lakes that lie within the limestone islands. For example, Dau Be island at the mouth of the Bay has six enclosed lakes including those of the Ba Ham lakes lying within its fencong karst. The Bay contains examples of the landscape elements of fengcong, fenglin and karst plain. These are not separate evolutionary stages but the result of natural non – uniform processes in the denudation of a large mass of limestone. Marine erosion created the notches which in some places have been enlarged into caves. The marine notch is a feature of limestone coastline but, in Ha Long Bay, it has created the mature landscape.

 

Within Ha Long Bay, the main accessible caves are the older passages that survive from the time when the karst was evolving though its various stages of fengcong and fenglin. Three main types of caves can be recognized in the limestone islands (Waltham, T. 1998):

 

Remnants of old phreatic caves

Old karstic foot caves

Marine notch caves

 

The first group of caves is old phreatic caves which include Sung Sot, Tam Cung, Lau Dai, Thien Cung, Dau Go, Hoang Long, Thien Long. Nowadays, these caves lie at various high levels. Sung Sot cave is on Bo Hon island. From its truncated entrance chambers on allege high on the cliff, a passage of more that 10m high and wide descends to the south. Tam Cung is a large phreatic fissure cave that developed in the bedding planes of the limestone dividing the fissure cave into three chambers. Lau Dai is a cave with a complex of passages extending over 300m opening on the south side of Con Ngua island. Thien Cung and Dau Go are remnants of the same old cave system. They both survive in the northern part of Dau Go island at between 20 and 50m above sea level. Thien Cung has one large chamber more that 100m long, blocked at its ends and almost subdivided into smaller chambers by massive wall of stalactites and stalagmites. Dau Go is a single large tunnel descending along a major set of fractures to a massive choke.

 

The second group of caves is the old karstic foot caves which include Trinh Lu, Bo Nau, Tien Ong and Trong caves. Foot caves are a ubiquitous feature of karst landscapes which have reached a stage of widespread lateral undercutting at base level. They may extend back into maze caves of stream caves draining from larger cave systems within the limestone. They are distinguished by the main elements of their passages being close to the horizontal and are commonly related to denuded or accumulated terraces at the old base levels. Trinh Nu, which is one of the larger foot caves in Ha Long Bay with its ceiling at about 12m above sea level and about 80m in length, was developed in multiple stages. Bo Nau, a horizontal cave containing old stalactite deposits, cuts across the 25o dip of the bedding plane.

 

The third group is the marine notch caves that are a special feature of the karst of Ha Long Bay. The dissolution process of sea water acting on the limestone and erosion by wave action crates notches at the base of the cliffs. In advantageous conditions, dissolution of the limestone allows the cliff notches to be steadily deepened and extended into caves. Many of these at sea level extend right though the limestone hills into drowned dolines which are now tidal lakes.

 

A distinguishing feature of marine notch caves is an absolutely smooth and horizontal ceiling cut through the limestone. Some marine notch caves had been not formed at present sea level, but old sea levels related to sea level changes in Holocene transgression, event to Pleistocene sea levels. Some of them passed preserved the development of old karstic foot cave in mainland environment or preserved the remnants of older phreatic caves. One of the most unusual features of Ha Long Bay is the Bo Ham lake group of hidden lakes and their connecting tunnel – notch caves in Dau Be island. From the island’s perimeter cliff a cave, 10m wide at water level and curving so that it is almost completely dark, extends about 150m to Lake 1. Luon cave is on Bo Hon island and extends 50m though to an enclosed tidal lake. It has a massive stalactite hanging 2m down and truncated at the modern tidal level. It has passed though many stages in its formation.

 

The karst landscape of Ha Long Bay is of international significance and of fundamental importance to the science of geomorphology. The fenglin tower karst, which is the type present in much of Ha Long Bay, is the most extreme form of limestone landscape development. If these karst landscapes are broadly compared in terms of their height, steepness and number of their limestone towers, Ha Long Bay is probably second in the entire world only to Yangshou, in China. However, Ha Long Bay ha also been invaded by the sea so that the geomorphology of its limestone is lands are, at least in part, the consequence of marine erosion. The marine invasion distinguishes Ha Long Bay and makes it unique in the world. There are other areas of submerged karst towers which were invaded by the sea, but none is as extensive as Ha Long Bay.

 

TIMELINE OF GEOLOGIC EVOLUTION

Some of the most remarkable geological events in Hạ Long Bay's history have occurred in the last 1,000 years, include the advance of the sea, the raising of the bay area, strong erosion that has formed coral, and, pure blue and heavily salted water. This process of erosion by seawater has deeply engraved the stone, contributing to its fantastic beauty. Present-day Hạ Long Bay is the result of this long process of geological evolution that has been influenced by so many factors.

 

Due to all these factors, tourists visiting Hạ Long Bay are not only treated to one of the natural wonders of the world, but also to a precious geological museum that has been naturally preserved in the open air for the last 300 million years.

 

ECOLOGY

Halong Bay is host to two ecosystems: a tropical, moist, evergreen rainforest ecosystem; and a marine and coastal ecosystem. The bay is home to seven endemic species: Livistona halongensis, Impatiens halongensis, Chirita halongensis, Chirita hiepii, Chirita modesta, Paraboea halongensis and Alpinia calcicola.

 

The many islands that dot the bay are home to a great many other species, including (but likely not limited to): 477 magnoliales, 12 pteris, 20 salt marsh flora; and 4 amphibia, 10 reptilia, 40 aves, and 4 mammalia.

 

Common aquatic species found in the bay include: cuttlefish (mực); oyster (hào); cyclinae (ngán); prawns (penaeidea (tôm he), panulirus (tôm hùm), parapenaeopsis (tôm sắt), etc.); sipunculoideas (sá sùng); nerita (ốc đĩa); charonia tritonis (ốc tù và); and cà sáy.

 

ENVIRONMENTAL DAAGE

With an increasing tourist trade, mangroves and seagrass beds have been cleared and jetties and wharves have been built for tourist boats.

 

Game fishing, often near coral reefs, is threatening many endangered species of fish.

 

Local government and businesses are aware of problems and many measures have been taken to minimize tourism affect to the bay environment for sustainable economic growth like introducing eco friendly tours and introducing tight waste control on resorts.

 

AWARDS AND DESIGNATIONS

In 1962, the Vietnam Ministry of Culture, Sport and Tourism designated Hạ Long Bay a 'Renowned National Landscape Monument'.

 

Hạ Long Bay was first listed as a UNESCO World Heritage Site in 1994, in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognised Hạ Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated.

 

In October 2011, World Monuments Fund included the bay on the 2012 World Monuments Watch, citing tourism pressures and associated development as threats to the site that must be addressed. The goal of Watch-listing is to promote strategies of responsible heritage-driven development for a sustainable future.

 

In 2012, New 7 Wonders Foundation officially named Halong Bay as one of New Seven Natural Wonders of the world.

 

Hạ Long Bay is also a member of the Club of the Most Beautiful Bays of the World.

 

IN LITERATURE

In writings about Hạ Long Bay, the following Vietnamese writers said:

 

Nguyễn Trãi: "This wonder is ground raising up into the middle of the high sky".

Xuân Diệu: "Here is the unfinished works of the Beings...Here is the stones which the Giant played and threw away".

Nguyên Ngọc: "...to form this first- rate wonder, nature only uses: Stone and Water...There are just only two materials themselves chosen from as much as materials, in order to write, to draw, to sculpture, to create everything...It is quite possible that here is the image of the future world".

Ho Chi Minh: "It is the wonder that one cannot impart to others".

Phạm Văn Đồng: "Is it one scenery or many sceneries? Is it the scenery in the world or somewhere?".

Nguyễn Tuân: "Only mountains accept to be old, but Hạ Long sea and wave are young for ever".

Huy Cận: "Night breathes, stars wave Hạ Long's water".

Chế Lan Viên:

 

"Hạ Long, Bái Tử Long- Dragons were hidden, only stones still remain

On the moonlight nights, stones meditate as men do..."

Lord Trịnh Cương overflowed with emotion: "Mountains are glistened by water shadow, water spills all over the sky".

 

ANCIENT TALES

Hạ Long bay's inhabitants have developed numerous tales explaining names given to various isles and caves in the bay.

 

Đầu Gỗ cave (literally: "the end of wooden bars" cave): these wooden bars in this cave are the remnants of sharped wooden columns built under the water level by the order of Trần Hưng Đạo commander in order to sink Mongolian invaders' ships in the 13th century.

Kim Quy cave (literally: "Golden Turtle" cave): it is told that the Golden Turtle swam toward the Eastern Sea (international name: South China Sea) after returning the holy sword which had assisted King Lê Thái Tổ in the combat against Ming invaders from China. Next, with the approval of the Sea King, Golden Turtle continued to fight against monsters in this marine area. The turtle became exhausted and died in a cave. Consequently, the cave was named after the Golden Turtle.

Con Cóc isle (literally: Frog isle): is a frog- like isle. According to ancient tales, in a year of severe drought, a frog directed all animals to the Heaven and protested against the God. They demonstrated in favour of making rain. As a result, the God must accept the frog as his uncle. Since then, whenever frogs grind their teeth, the God has to pour water down the ground.

 

WIKIPEDIA

Each of us submitted an essay on innovation and growth in advance for the Gruter Institute Conference on Growth. I’ll append mine below.

 

(photo by John Chisholm. More below).

 

Discussion ensued over lunch, and one of my favorite authors, Matt Ridley wrote a summary for the WSJ “Why Can't Things Get Better Faster (or Slower)?”

 

------------------------------------

Innovation and Growth — Evolving Cities and Culture

By Steve Jurvetson

 

Innovation is critical to economic growth, progress, and the fate of the planet. Yet, it seems so random. But patterns emerge in the aggregate, and planners and politicians may be able to promote innovation and growth despite the overall inscrutability of this complex system. To tap the wisdom of crowds, we should shift the locus of learning from products to process. Leadership is not spotting the next growth industry, but tuning the parameters of human communication.

 

One emergent pattern, spanning centuries, is that the pace of innovation is perpetually accelerating, and it is exogenous to the economy. Rather, it is the combinatorial explosion of possible innovation-pairings that creates economic growth. And that is why cities are the crucible of innovation.

 

Geoffrey West of the Santa Fe Institute argues that cities are an autocatalytic attractor and amplifier of innovation. People are more innovative and productive, on average, when they live in a city because ideas can cross-pollinate more easily. Proximity promotes propinquity and the promiscuity of what Matt Ridley calls “ideas having sex”. This positive network effect drives another positive feedback loop - by attracting the best and the brightest to flock to the salon of mind, the memeplex of modernity.

 

Cities are a structural manifestation of the long arc of evolutionary indirection, whereby the vector of improvement has risen steadily up the ladder of abstractions from chemicals to genes to systems to networks. At each step, the pace of progress has leapt forward, making the prior vectors seem glacial in comparison – rather we now see the nature of DNA and even a neuron as a static variable in modern times. Now, it’s all about the ideas - the culture and the networks of humanity. We have moved from genetic to mimetic evolution, and much like the long-spanning neuron (which took us beyond nearest neighbor and broadcast signaling among cells) ushering the Cambrian explosion of differentiated and enormous body plans, the Internet brings long-spanning links between humans, engendering an explosion in idea space, straddling isolated pools of thought.

 

And it’s just beginning. In the next 10 years, three billion minds will come online for the first time to join this global conversation (Diamandis).

 

But why does this drive innovation and accelerating change? Start with Brian Arthur’s observation that all new technologies are combinations of technologies that already exist. Innovation does not occur in a vacuum; it is a combination of ideas from before. In any academic field, the advances today are built on a large edifice of history. This is the foundation of progress, something that was not so evident to the casual observer before the age of science. Science tuned the process parameters for innovation, and became the best method for a culture to learn.

 

From this conceptual base, come the origin of economic growth and accelerating technological change, as the combinatorial explosion of possible idea pairings grows exponentially as new ideas come into the mix (on the order of 2^n of possible groupings per Reed’s Law). It explains the innovative power of urbanization and networked globalization. And it explains why interdisciplinary ideas are so powerfully disruptive; it is like the differential immunity of epidemiology, whereby islands of cognitive isolation (e.g., academic disciplines) are vulnerable to disruptive memes hopping across, much like South America was to smallpox from Cortés and the Conquistadors. If disruption is what you seek, cognitive island-hopping is good place to start, mining the interstices between academic disciplines.

 

So what evidence do we have of accelerating technological change? At DFJ, we see it in the diversity and quality of the entrepreneurial ideas arriving each year across our global offices. Scientists do not slow their thinking during recessions. For a good mental model of the pace of innovation, consider Moore’s Law in the abstract – the annual doubling of compute power or data storage. As Ray Kurzweil has plotted, the smooth pace of exponential progress spans from 1890 to 2012, across countless innovations, technology substrates, and human dramas — with most contributors completely unaware that they were fitting to a curve.

 

Moore’s Law is a primary driver of disruptive innovation – such as the iPod usurping the Sony Walkman franchise – and it drives not only IT and communications, but also now genomics, medical imaging and the life sciences in general. As Moore’s Law crosses critical thresholds, a formerly lab science of trial and error experimentation becomes a simulation science and the pace of progress accelerates dramatically, creating opportunities for new entrants in new industries. And so the industries impacted by the latest wave of tech entrepreneurs are more diverse, and an order of magnitude larger — from automobiles and rockets to energy and chemicals.

 

At the cutting edge of computational capture is biology; we are actively reengineering the information systems of biology and creating synthetic microbes whose DNA was manufactured from bare computer code and an organic chemistry printer. But what to build? So far, we largely copy large tracts of code from nature. But the question spans across all the complex systems that we might wish to build, from cities to designer microbes, to computer intelligence.

 

As these systems transcend human comprehension, will we continue to design them or will we increasingly evolve them? As we design for evolvability, the locus of learning shifts from the artifacts themselves to the process that created them. There is no mathematical shortcut for the decomposition of a neural network or genetic program, no way to "reverse evolve" with the ease that we can reverse engineer the artifacts of purposeful design. The beauty of compounding iterative algorithms (evolution, fractals, organic growth, art) derives from their irreducibility. (My Google Tech Talk goes into some detail on the dichotomy of design and evolution).

 

The corporation is a complex system that seeks to perpetually innovate. Leadership in these complex organizations shifts from direction setting to a wisdom of crowds. And the process learning is a bit counterintuitive to some alpha leaders: cognitive diversity is more important than ability, disagreement is more important than consensus, voting policies and team size are more important than the coherence or comprehensibility of the decisions, and tuning the parameters of communication (frequency and fanout) is more important than charisma.

 

The same could be said for urban planning. How will cities be built and iterated upon? Who will make those decisions and how? We are just starting to see the shimmering refractions of the hive mind of human culture, and now we want to redesign the hives themselves to optimize the emergent complexity within. Perhaps the best we can do is set up the grand co-evolutionary dance, and listen carefully for the sociobiology of supra-human sentience.

HALONG BAY

Hạ Long Bay or Halong Bay (Vietnamese: Vịnh Hạ Long, IPA: [vînˀ hâːˀ lawŋm] (About this soundlisten)) is a UNESCO World Heritage Site and popular travel destination in Quảng Ninh Province, Vietnam. The name Hạ Long means "descending dragon". Administratively, the bay belongs to Hạ Long city, Cẩm Phả city, and is a part of Vân Đồn District. The bay features thousands of limestone karsts and isles in various shapes and sizes. Ha Long Bay is a center of a larger zone which includes Bai Tu Long Bay to the northeast, and Cát Bà Island to the southwest. These larger zones share a similar geological, geographical, geomorphological, climate, and cultural characters.

 

Hạ Long Bay has an area of around 1,553 km2 (600 sq mi), including 1,960–2,000 islets, most of which are limestone. The core of the bay has an area of 334 km2 with a high density of 775 islets. The limestone in this bay has gone through 500 million years of formation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years under the impact of the tropical wet climate. The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. Hạ Long Bay is home to 14 endemic floral species and 60 endemic faunal species.

 

Historical research surveys have shown the presence of prehistoric human beings in this area tens of thousands years ago. The successive ancient cultures are the Soi Nhu culture around 18,000–7000 BC, the Cai Beo culture 7000–5000 BC and the Hạ Long culture 5,000–3,500 years ago. Hạ Long Bay also marked important events in the history of Vietnam with many artifacts found in Bai Tho Mountain, Dau Go Cave, Bai Chay.

 

500 years ago, Nguyễn Trãi praised the beauty of Ha Long Bay in his verse Lộ nhập Vân Đồn, in which he called it "rock wonder in the sky". In 1962, the Ministry of Culture, Sports and Tourism of North Vietnam listed Ha Long Bay in the National Relics and Landscapes publication. In 1994, the core zone of Ha Long Bay was listed as a World Heritage Site according to Criterion VII, and listed for a second time according to Criterion VIII.

 

ETYMOLOGY

The name Hạ Long (chữ Hán: 下龍) means "descending dragon".

 

Before the 19th century, the name Hạ Long Bay had not been recorded in the old books of the country. It has been called An Bang, Lục Thủy, Vân Đồn ... In the late 19th century, the name Hạ Long Bay appeared on the Maritime Map of France. The French-language Hai Phong News reported "Dragon appears on Hạ Long Bay".

 

According to local legend, when Vietnam had just started to develop into a country, they had to fight against invaders. To assist the Vietnamese in defending their country, the gods sent a family of dragons as protectors. This family of dragons began spitting out jewels and jade. These jewels turned into the islands and islets dotting the bay, linking together to form a great wall against the invaders. Under magics, numerous rock mountains abruptly appeared on the sea, ahead of invaders' ships; the forward ships struck the rocks and each other. After winning the battle, the dragons were interested in peaceful sightseeing of the Earth, and then decided to live in this bay. The place where the mother dragon descended was named Ha Long, the place where the dragon's children attended upon their mother was called Bái Tử Long island (Bái: attend upon, Tử: children, Long: dragon), and the place where the dragon's children wriggled their tails violently was called Bạch Long Vĩ island (Bạch: white-color of the foam made when Dragon's children wriggled, Long: dragon, Vĩ: tail), present-day Tra Co peninsula, Móng Cái.

 

OVERVIEW

The bay consists of a dense cluster of some 1,600 limestone monolithic islands each topped with thick jungle vegetation, rising spectacularly from the ocean. Several of the islands are hollow, with enormous caves. Hang Dau Go (Wooden Stakes cave) is the largest grotto in the Ha Long area. French tourists visited in the late 19th century, and named the cave Grotte des Merveilles. Its three large chambers contain large numerous stalactites and stalagmites (as well as 19th-century French graffiti). There are two bigger islands, Tuần Châu and Cát Bà, that have permanent inhabitants, as well as tourist facilities including hotels and beaches. There are a number of beautiful beaches on the smaller islands. A community of around 1,600 people live on Hạ Long Bay in four fishing villages: Cua Van, Ba Hang, Cong Tau and Vong Vieng in Hung Thang ward, Ha Long city. They live on floating houses and are sustained through fishing and marine aquaculture (cultivating marine biota), plying the shallow waters for 200 species of fish and 450 different kinds of mollusks. Many of the islands have acquired their names as a result of interpretation of their unusual shapes. Such names include Voi Islet (elephant), Ga Choi Islet (fighting cock), Khi Islet (monkey), and Mai Nha Islet (roof). 989 of the islands have been given names. Birds and animals including bantams, antelopes, monkeys, and lizard also live on some of the islands.

 

Almost all these islands are as individual towers in a classic fenglin landscape with heights from 50–100 metres (160–330 ft), and height/width ratios of up to about six.

 

Another specific feature of Hạ Long Bay is the abundance of lakes inside the limestone islands. For example, Dau Be island has six enclosed lakes. All these island lakes occupy drowned dolines within fengcong karst.

 

LOCATION

Hạ Long Bay is located in northeastern Vietnam, from E106°55' to E107°37' and from N20°43' to N21°09'. The bay stretches from Quang Yen town, past Hạ Long city, Cẩm Phả city to Vân Đồn District, is bordered on the south and southeast by Lan Ha Bay, on the north by Hạ Long city, and on the west by Bai Tu Long Bay. The bay has a 120-kilometre-long coastline and is approximately 1,553 km2 in size with about 2,000 islets. The area designated by UNESCO as the World Natural Heritage Site incorporates 434 km2 with 775 islets, of which the core zone is delimited by 69 points: Dau Go island on the west, Ba Ham lake on the south and Cong Tay island on the east. The protected area is from the Cái Dăm petrol store to Quang Hanh ward, Cẩm Phả city and the surrounding zone.

 

CLIMATE

The climate of the bay is tropical, wet, sea islands, with two seasons: hot and moist summer, dry and cold winter. The average temperature is from 15–25 °C, and annual rainfall is between 2 and 2.2 metres. Ha Long Bay has the typical diurnal tide system (tide amplitude ranges from 3.5–4 metres. The salinity is from 31 to 34.5MT in the dry season and lower in the rainy season.

 

POPULATION

Of the 1,969 islands in Ha Long, only approximately 40 are inhabited. These islands range from tens to thousands of hectares in size, mainly in the East and Southeast of Hạ Long Bay. In recent decades, thousands of villagers have been starting to settle down on the pristine islands and build new communities such as Sa Tô Island (Hạ Long City), Thắng Lợi Island (Vân Đồn district).

 

The population of Hạ Long Bay is about 1,540, mainly in Cửa Vạn, Ba Hang and Cặp Dè fishing villages (Hùng Thắng Ward, Hạ Long City). Residents of the bay mostly live on boats and rafts buoyed by tires and plastic jugs to facilitate the fishing, cultivating and breeding of aquatic and marine species. Fish require feeding every other day for up to three years, when they are eventually sold to local seafood restaurants for up to 300,000 Vietnamese dong per kilogram. Today the life of Hạ Long Bay inhabitants has much improved due to new travel businesses. Residents of the floating villages around the Ha Long bay now offer bedrooms for rent, boat tours, and fresh seafood meals to tourists. While this is an isolating, back-breaking lifestyle, floating village residents are considered wealthy to residents of other Hạ Long Bay islands.

 

At present ((clarify)), the Quảng Ninh provincial government has a policy to relocate the households living in the bay to resettle, in order to stabilize their life and to protect the landscape of the heritage zone. More than 300 households living in fishing villages in Hạ Long Bay have been relocated ashore in Khe Cá Resettlement Area, now known as Zone 8 (Hà Phong Ward, Hạ Long City) since May 2014. This project will continue to be implemented. The province will only retain a number of fishing villages for sightseeing tours.

 

HISTORY

SOI NHU CULTURE (16,000–5000 BC)

Located in Hạ Long and Bai Tu Long are archaeological sites such as Me Cung and Thien Long. There are remains from mounds of mountain shellfish (Cyclophorus), spring shellfish (Melania, also called Thiana), some fresh water mollusc and some rudimentary labour tools. The main way of life of Soi Nhu's inhabitants included catching fish and shellfish, collecting fruits and digging for bulbs and roots. Their living environment was a coastal area unlike other Vietnamese cultures, for example, like those found in Hoa Binh and Bac Son.

 

CAI BEO CULTURE (5000–3000 BC)

Located in Hạ Long and Cat Ba island, its inhabitants developed to the level of sea exploitation. Cai Beo culture is a link between Soi Nhu culture and Hạ Long culture

Hạ Long culture (2500–1500 BC)

 

CLASSICAL PERIOD

History shows that Hạ Long Bay was the setting for local naval battles against Vietnam's coastal neighbors. On three occasions, in the labyrinth of channels in Bạch Đằng River near the islands, the Vietnamese army stopped the Chinese from landing. In 1288, General stopped Mongol ships from sailing up the nearby Bach Dang River by placing steel-tipped wooden stakes at high tide, sinking the Mongol Kublai Khan's fleet.

 

MODERN PERIOD

Hạ Long Bay was the site of the first ever raising of the new national flag of the Provisional Central Government of Vietnam on 5 June 1948 during the signing of the Halong Bay Agreements (Accords de la baie d’Along) by High Commissioner Emile Bollaert and President Nguyễn Văn Xuân.

 

During the Vietnam War, many of the channels between the islands were heavily mined by the United States Navy, some of which pose a threat to shipping to this day.

 

GEOLOGY AND GEOMORPHOLOGY

In 2000, UNESCO's World Heritage Committee inscribed Hạ Long Bay in the World Heritage List according to its outstanding examples representing major stages of the Earth's history and its original limestone karstic geomorphologic features. Hạ Long Bay and its adjacent areas consist of a part of the Sino-Vietnamese composite terrane having its development history from pre-Cambrian up to present day. During Phanerozoic, terrigenous, volcanogenic and cherty-carbonate sediments containing in abundance graptolites, brachiopods, fishes, corals, foraminiferas, radiolarias, bivalves and flora, separated one from another by 10 stratigraphic gaps, but the boundary between Devonian and Carboniferous has been considered as continuous. The limestone karstic geomorphology of the bay was developed since Miocene, especially the cone-shaped hills (fengcong), or isolated high limestone karst towers (fenglin) with many remnants of old phreatic caves, old karstic foot caves, marine notch caves form magnificent limestone karst landforms as unique on the world. The Quaternary geology was developed through 5 cycles with the intercalation of marine and continental environments. The present Hạ Long Bay, in fact, appeared after the Middle Holocene maximum transgression, leaving ultimate zone of lateral undercutting in the limestone cliffs bearing many shells of oysters, having the 14C age as 2280 to >40,000 y. BP. Geological resources are abundant: anthracite, lignite, oil shale, petroleum, phosphate, limestone and cement additives, kaolin, silica sand, dolomite, quartzite of exogenous origin, and antimony, mercury of hydrothermal origin. Besides, there still are surface water, groundwater and thermal mineral water on the shore of the Hạ Long - Bái Tử Long Bays and other environmental resources.

 

In terms of marine geology, this area is recorded as an especially coastal sedimentary environment. In the alkaline seawater environment, the chemical denudation process of calcium carbonate proceeds rapidly, creating wide, strangely shaped marine notches.

 

The bottom surface sediments are various from clay mud to sand, however, silty mud and clay mud are dominated in distribution. Especially, the carbonate materials originated from organisms make up from 60 to 65% sedimentary content. The surface sediments of coral reefs are mainly sand and pebbles of which the carbonate materials occupy for more than 90%. The intertidal zone sediments are various from clay mud to sand and gravel depending to distinguished sedimentary environments such as mangrove marshes, tidal flats, beaches etc. At the small, but wonderfully beautiful beaches, the sand sediments may be dominated quartz or carbonate materials.

 

The sediment layers of intertidal zone, the upper sea bed with a plain surface conserving ancient rivers, systems of caves and its sediments, traces of ancient marine action forming distinctive notches, beaches and marine terraces, mangrove swamps are important evidence of geological events and processes taking place during Quaternary.

 

HISTORY OF TECTONICS

Hạ Long Bay has experienced at least 500 million years in various geological states of orogeny, marine transgression and marine regression. During the Ordovician and Silurian periods (500-410 million years ago), Hạ Long Bay was deep sea. During the Carboniferous and Permian periods (340-250 million years ago), Ha Long Bay was at shallow sea level.

 

The dominated uplift movement of neotectonic and recent tectonic influenced deeply on topography of this area, and the present landscape of sea-islands was formed around 7 or 8 thousand years ago by the sea invasion during Holocene transgression begun at about 17-18 thousand years ago. Particularly from the Holocene time, from about 11,000 years ago Cat Ba - Ha Long area has much archaeological evidence connecting variations in sea levels with the development of ancient cultures such as the Soi Nhu and Ha Long cultures.

 

KARST GEOMORPHOLOGY VALUE

Due to a simultaneous combination of ideal factors such as thick, pale, grey, and strong limestone layers, which are formed by fine-grained materials; hot and moist climate and slow tectonic process as a whole; Ha Long Bay has had a complete karst evolution for 20 million years. There are many types of karst topography in the bay, such as karst field.

 

Hạ Long Bay is a mature karst landscape developed during a warm, wet, tropical climate. The sequence of stages in the evolution of a karst landscape over a period of 20 million years requires a combination of several distinct elements including a massive thickness of limestone, a hot wet climate and slow overall tectonic up lift. The process of karst formation is divided into five stages, the second of which is the formation of the distinctive do line karst. This is followed by the development of fengcong karst, which can be seen in the groups of hills on Bo Hon and Dau Be Inland. These cones with sloping sides average 100m in height with the tallest exceeding 200m. Fenglin karst is characterised by steep separate towers. The hundreds of rocky islands with form the beautiful and famous landscape of the Bay are the individual towers of a classic Fenglin landscape where the intervening plains have been submerged by the sea. Most towers reach a height of between 50 and 100m with a height to width ratio of about 6. The karst dolines were flooded by the sea, becoming the abundance of lakes that lie within the limestone islands. For example, Dau Be island at the mouth of the Bay has six enclosed lakes including those of the Ba Ham lakes lying within its fengcong karst. The Bay contains examples of the landscape elements of fengcong, fenglin and karst plain. These are not separate evolutionary stages but the result of natural non – uniform processes in the denudation of a large mass of limestone. Marine erosion created the notches which in some places have been enlarged into caves. The marine notch is a feature of limestone coastline but, in Ha Long Bay, it has created the mature landscape.

 

Within Hạ Long Bay, the main accessible caves are the older passages that survive from the time when the karst was evolving though its various stages of fengcong and fenglin. Three main types of caves can be recognized in the limestone islands (Waltham, T. 1998):

 

Remnants of old phreatic caves

Old karstic foot caves

Marine notch caves

 

The first group consists of old phreatic caves which include Sung Sot, Tam Cung, Lau Dai, Thien Cung, Dau Go, Hoang Long, Thien Long. Nowadays, these caves lie at various high levels. Sung Sot cave is on Bo Hon island. From its truncated entrance chambers on a ledge high on the cliff, a passage of more that 10m high and wide descends to the south. Tam Cung is a large phreatic fissure cave that developed in the bedding planes of the limestone dividing the fissure cave into three chambers. Lau Dai is a cave with a complex of passages extending over 300m opening on the south side of Con Ngua island. Thien Cung and Dau Go are remnants of the same old cave system. They both survive in the northern part of Dau Go island at between 20 and 50m above sea level. Thien Cung has one large chamber more that 100m long, blocked at its ends and almost subdivided into smaller chambers by massive wall of stalactites and stalagmites. Dau Go is a single large tunnel descending along a major set of fractures to a massive choke.

 

The second group of caves is the old karstic foot caves which include Trinh Lu, Bo Nau, Tien Ong and Trong caves. Foot caves are a ubiquitous feature of karst landscapes which have reached a stage of widespread lateral undercutting at base level. They may extend back into maze caves of stream caves draining from larger cave systems within the limestone. They are distinguished by the main elements of their passages being close to the horizontal and are commonly related to denuded or accumulated terraces at the old base levels. Trinh Nu, which is one of the larger foot caves in Ha Long Bay with its ceiling at about 12m above sea level and about 80m in length, was developed in multiple stages. Bo Nau, a horizontal cave containing old stalactite deposits, cuts across the 25o dip of the bedding plane.

 

The third group is the marine notch caves that are a special feature of the karst of Hạ Long Bay. The dissolution process of sea water acting on the limestone and erosion by wave action crates notches at the base of the cliffs. In advantageous conditions, dissolution of the limestone allows the cliff notches to be steadily deepened and extended into caves. Many of these at sea level extend right though the limestone hills into drowned dolines which are now tidal lakes.

 

A distinguishing feature of marine notch caves is an absolutely smooth and horizontal ceiling cut through the limestone. Some marine notch caves had been not formed at present sea level, but old sea levels related to sea level changes in Holocene transgression, event to Pleistocene sea levels. Some of them passed preserved the development of old karstic foot cave in mainland environment or preserved the remnants of older phreatic caves. One of the most unusual features of Ha Long Bay is the Bo Ham lake group of hidden lakes and their connecting tunnel – notch caves in Dau Be island. From the island's perimeter cliff a cave, 10m wide at water level and curving so that it is almost completely dark, extends about 150m to Lake 1. Luon cave is on Bo Hon island and extends 50m though to an enclosed tidal lake. It has a massive stalactite hanging 2m down and truncated at the modern tidal level. It has passed through many stages in its formation.

 

The karst landscape of Hạ Long Bay is of international significance and of fundamental importance to the science of geomorphology. The fenglin tower karst, which is the type present in much of Ha Long Bay, is the most extreme form of limestone landscape development. If these karst landscapes are broadly compared in terms of their height, steepness and number of their limestone towers, Ha Long Bay is probably second in the entire world only to Yangshou, in China. However, Hạ Long Bay has also been invaded by the sea so that the geomorphology of its limestone islands are, at least in part, the consequence of marine erosion. The marine invasion distinguishes Ha Long Bay and makes it unique in the world. There are other areas of submerged karst towers which were invaded by the sea, but none is as extensive as Ha Long Bay.

 

TIMELINE OF GEOLOGIC EVOLUTION

Some of the most remarkable geological events in Hạ Long Bay's history have occurred in the last 1,000 years, include the advance of the sea, the raising of the bay area, strong erosion that has formed coral, and, pure blue and heavily salted water. This process of erosion by seawater has deeply engraved the stone, contributing to its fantastic beauty. Present-day Ha Long Bay is the result of this long process of geological evolution that has been influenced by so many factors.

 

Due to all these factors, tourists visiting Ha Long Bay are not only treated to one of the natural wonders of the world, but also to a precious geological museum that has been naturally preserved in the open air for the last 300 million years.

 

ECOLOGY

Hạ Long Bay is host to two ecosystems: a tropical, moist, evergreen rainforest ecosystem; and a marine and coastal ecosystem. The bay is home to seven endemic species: Livistona halongensis, Impatiens halongensis, Chirita halongensis, Chirita hiepii, Chirita modesta, Paraboea halongensis and Alpinia calcicola. Bioluminescent plankton can also be found.

 

The many islands that dot the bay are home to a great many other species, including (but likely not limited to): 477 magnoliales, 12 pteris, 20 salt marsh flora; and 4 amphibia, 10 reptilia, 40 aves, and 4 mammalia.

 

Common aquatic species found in the bay include: cuttlefish (mực); oyster (hào); cyclinae (ngán); prawns (penaeidea (tôm he), panulirus (tôm hùm), parapenaeopsis (tôm sắt), etc.); sipunculoideas (sá sùng); nerita (ốc đĩa); charonia tritonis (ốc tù và); and cà sáy.

 

ENVIRONMENTAL DAMAGE

With an increasing tourist trade, mangroves and seagrass beds have been cleared and jetties and wharves have been built for tourist boats.

 

Game fishing, often near coral reefs, is threatening many endangered species of fish.

 

Local government and businesses are aware of the problems and many measures have been taken to minimise the impact of tourism on the bay environment for sustainable economic growth like introducing eco-friendly tours and introducing tight waste control on resorts.

 

AWARDS AND DESIGNATIONS

In 1962, the Vietnam Ministry of Culture, Sport and Tourism designated Ha Long Bay a 'Renowned National Landscape Monument'.

 

Hạ Long Bay was first listed as a UNESCO World Heritage Site in 1994, in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognised Ha Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated.

 

In October 2011, World Monuments Fund included the bay on the 2012 World Monuments Watch, citing tourism pressures and associated development as threats to the site that must be addressed. The goal of Watch-listing is to promote strategies of responsible heritage-driven development for a sustainable future.

 

In 2012, New 7 Wonders Foundation officially named Ha Long Bay as one of New Seven Natural Wonders of the world.

 

Ha Long Bay is also a member of the Club of the Most Beautiful Bays of the World.

 

WIKIPEDIA

Hạ Long Bay (Vietnamese: Vịnh Hạ Long, About this sound listen, literally: "descending dragon bay") is a UNESCO World Heritage Site, and a popular travel destination, in Quảng Ninh Province, Vietnam. Administratively, the bay belongs to Hạ Long City, Cẩm Phả town, and the part of Vân Đồn District. The bay features thousands of limestone karsts and isles in various sizes and shapes. Hạ Long Bay is a center of a larger zone which includes Bái Tử Long bay to the northeast, and Cát Bà islands to the southwest. These larger zones share similar geological, geographical, geomorphological, climate, and cultural characters.

 

Hạ Long Bay has an area of around 1,553 km2, including 1,960–2,000 islets, most of which are limestone. The core of the bay has an area of 334 km2 with a high density of 775 islets. The limestone in this bay has gone through 500 million years of formation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years under the impact of the tropical wet climate. The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. Hạ Long Bay is home to 14 endemic floral species and 60 endemic faunal species.

 

Historical research surveys have shown the presence of prehistorical human beings in this area tens of thousands years ago. The successive ancient cultures are the Soi Nhụ culture around 18,000–7000 BC, the Cái Bèo culture 7000–5000 BC and the Hạ Long culture 5,000–3,500 years ago. Hạ Long Bay also marked important events in the history of Vietnam with many artifacts found in Bài Thơ Mount, Đầu Gỗ Cave, Bãi Cháy.

 

500 years ago, Nguyễn Trãi praised the beauty of Hạ Long Bay in his verse Lộ nhập Vân Đồn, in which he called it "rock wonder in the sky".[8] In 1962, the Ministry of Culture, Sports and Tourism of North Vietnam listed Hạ Long Bay in the National Relics and Landscapes publication. In 1994, the core zone of Hạ Long Bay was listed by UNESCO as a World Heritage Site according to criterion vii, and listed for a second time according to criterion viii.

 

ETYMOLOGY

The name Hạ Long is derived from the Sino-Vietnamese 下龍, meaning "descending dragon".

 

Before 19th century, the name Halong Bay had not been recorded in the old books of our country. It has been called An Bang, Luc Thuy, Van Don... Late 19th century, the name Halong Bay has appeared on the Maritime map of France. "Haiphong News" published in French, has reported: " Dragon appears on Halong Bay". The story can be summarized as follows: In 1898, lieutenant Lagoredin captain of Avalangso met a couple of giant sea snake on Halong Bay three times. Not only the lieutenant but also many other sailors saw those species. The European thought that those animals looked like Asian dragon. Maybe the appearance of strange animals led to the name of Quang Ninh sea area today: Halong Bay

 

According to local legend, when Vietnam had just started to develop into a country, they had to fight against invaders. To assist the Vietnamese in defending their country, the gods sent a family of dragons as protectors. This family of dragons began spitting out jewels and jade. These jewels turned into the islands and islets dotting the bay, linking together to form a great wall against the invaders. Under magics, numerous rock mountains abruptly appeared on the sea, ahead of invaders' ships; the forward ships struck the rocks and each other. After winning the battle, the dragons were interested in peaceful sightseeing of the Earth, and then decided to live in this bay. The place where the mother dragon descended was named Hạ Long, the place where the dragon's children attended upon their mother was called Bái Tử Long island (Bái: attend upon, Tử: children, Long: dragon), and the place where the dragon's children wriggled their tails violently was called Bạch Long Vỹ island (Bạch: white-color of the foam made when Dragon's children wriggled, Long: dragon, Vỹ: tail), present day Trà Cổ peninsula, Móng Cái.

 

OVERVIEW

The bay consists of a dense cluster of some 1,600 limestone monolithic islands each topped with thick jungle vegetation, rising spectacularly from the ocean. Several of the islands are hollow, with enormous caves. Hang Đầu Gỗ (Wooden stakes cave) is the largest grotto in the Hạ Long area. French tourists visited in the late 19th century, and named the cave Grotte des Merveilles. Its three large chambers contain large numerous stalactites and stalagmites (as well as 19th century French graffiti). There are two bigger islands, Tuần Châu and Cát Bà, that have permanent inhabitants, as well as tourist facilities including hotels and beaches. There are a number of beautiful beaches on the smaller islands.

 

A community of around 1,600 people live on Hạ Long Bay in four fishing villages: Cửa Vạn, Ba Hang, Cống Tàu and Vông Viêng in Hùng Thắng commune, Hạ Long city. They live on floating houses and are sustained through fishing and marine aquaculture (cultivating marine biota), plying the shallow waters for 200 species of fish and 450 different kinds of mollusks. Many of the islands have acquired their names as a result of interpretation of their unusual shapes. Such names include Voi Islet (elephant), Ga Choi Islet (fighting cock), Khi Islet (monkey), and Mai Nha Islet (roof). 989 of the islands have been given names. Birds and animals including bantams, antelopes, monkeys, and lizard also live on some of the islands.

 

Almost all these islands are as individual towers in a classic fenglin landscape with heights from 50m to 100m, and height/width ratios of up to about six.

 

Another specific feature of Halong Bay is the abundance of lakes inside the limestone islands. For example, Dau Be island has six enclosed lakes. All these island lakes occupy drowned dolines within fengcong karst.

 

LOCATION

Hạ Long Bay is located in northeastern Vietnam, from E106°56' to E107°37' and from N20°43' to N21°09'. The bay stretches from Yên Hưng district, past Hạ Long city, Cẩm Phả town to Vân Đồn District, bordered on the south and southeast by the Gulf of Tonkin, on the north by China, and on the west and southwest by Cát Bà Island. The bay has a 120 km long coastline and is approximately 1,553 km² in size with about 2,000 islets. The area designated by UNESCO as the World Natural Heritage Site incorporates 434 km² with 775 islets, of which the core zone is delimited by 69 points: Đầu Gỗ island on the west, Ba Hầm lake on the south and Cống Tây island on the east. The protected area is from the Cái Dăm petrol store to Quang Hanh commune, Cẩm Phả town and the surrounding zone.

 

CLIMATE

The climate of the bay is tropical, wet, sea islands, with two seasons: hot and moist summer, and dry and cold winter. The average temperature is from 15 °C- 25 °C, and annual rainfall is between 2 meters and 2.2 meters. Hạ Long Bay has the typical diurnal tide system (tide amplitude ranges from 3.5-4m). The salinity is from 31 to 34.5MT in the dry season and lower in the rainy season.

 

HISTORY

SOI NHU CULTURE (16,000–5000 BC)

Located in Hạ Long and Bái Tử Long are archaeological sites such as Mê Cung and Thiên Long. There are remains from mounds of mountain shellfish (Cyclophorus), spring shellfish (Melania), some fresh water mollusc and some rudimentary labour tools. The main way of life of Soi Nhụ's inhabitants included catching fish and shellfish, collecting fruits and digging for bulbs and roots. Their living environment was a coastal area unlike other Vietnamese cultures, for example, like those found in Hòa Bình and Bắc Sơn.

 

CAI BEO CULTURE (5000–3000 BC)

Located in Hạ Long and Cát Bà island, its inhabitants developed to the level of sea exploitation. Cái Bèo culture is a link between Soi Nhụ culture and Hạ Long culture.

 

FEUDAL PERIOD

History shows that Hạ Long Bay was the setting for local naval battles against Vietnam's coastal neighbors. On three occasions, in the labyrinth of channels in Bạch Đằng River near the islands, the Vietnamese army stopped the Chinese from landing. In 1288, General Trần Hưng Đạo stopped Mongol ships from sailing up the nearby Bạch Đằng River by placing steel-tipped wooden stakes at high tide, sinking the Mongol Kublai Khan's fleet.

 

During the Vietnam War, many of the channels between the islands were heavily mined by the United States navy, some of which pose a threat to shipping to this day.

 

GEOLOGY AND GEOMORPHOLOGY

In 2000, the UNESCO’s World Heritage Committee has inscribed the Hạ Long Bay in the World Heritage List according to its outstanding examples representing major stages of the Earth’s history and its original limestone karstic geomorphologic features. The Hạ Long Bay and its adjacent areas consist of a part of the Sino-Vietnamese composite terrane having its development history from pre-Cambrian up to present day. During Phanerozoic, terrigenous, volcanogenic and cherty-carbonate sediments containing in abundance graptolites, brachiopods, fishes, corals, foraminiferas, radiolarias, bivalves and flora, separated one from another by 10 stratigraphic gaps, but the boundary between Devonian and Carboniferous has been considered as continuous. The limestone karstic geomorphology of the bay was developed since Miocene, especially the cone-shaped hills (fengcong), or isolated high limestone karst towers (fenglin) with many remnants of old phreatic caves, old karstic foot caves, marine notch caves form magnificent limestone karst landforms as unique on the world. The Quaternary geology was developed through 5 cycles with the intercalation of marine and continental environments. The present Hạ Long Bay, in fact, appeared after the Middle Holocene maximum transgression, leaving ultimate zone of lateral undercutting in the limestone cliffs bearing many shells of oysters, having the 14C age as 2280 to >40,000 y. BP. Geological resources are abundant: anthracite, lignite, oil shale, petroleum, phosphate, limestone and cement additives, kaolin, silica sand, dolomite, quartzite of exogenous origin, and antimony, mercury of hydrothermal origin. Besides, there still are surface water, groundwater and thermal mineral water on the shore of the Hạ Long - Bái Tử Long Bays and other environmental resources.

 

In terms of marine geology, this area is recorded as an especially coastal sedimentary environment. In the alkaline seawater environment, the chemical denudation process of calcium carbonate proceeds rapidly, creating wide, strangely shaped marine notches.

 

The bottom surface sediments are various from clay mud to sand, however, silty mud and clay mud are dominated in distribution. Especially, the carbonate materials originated from organisms make up from 60-65% sedimentary content. The surface sediments of coral reefs are mainly sand and pebbles of which the carbonate materials occupy for more than 90%. The intertidal zone sediments are various from clay mud to sand and gravel depending to distinguished sedimentary environments such as mangrove marshes, tidal flats, beaches etc. At the small, but wonderfully beautiful beaches, the sand sediments may be dominated quartz or carbonate materials.

 

The sediment layers of intertidal zone, the upper sea bed with a plain surface conserving ancient rivers, systems of caves and it's sediments, traces of ancient marine action forming distinctive notches, beaches and marine terraces, mangrove swamps are important evidence of geological events and processes taking place during Quaternary.

 

HISTORY OF TECTONICS

Hạ Long Bay has experienced at least 500 million years in various geological states of orogeny, marine transgression and marine regression. During the Ordovician and Silurian periods (500-410 million years ago), Hạ Long Bay was deep sea. During the Carboniferous and Permian periods (340-250 million years ago), Hạ Long Bay was at shallow sea level.

 

The dominated uplift movement of neotectonic and recent tectonic influenced deeply on topography of this area, and the present landscape of sea-islands was formed around 7 or 8 thousand years ago by the sea invasion during Holocene transgression begun at about 17-18 thousand years ago. Particularly from the Holocene time, from about 11,000 years ago Cat Ba - Hạ Long area has much archaeological evidence connecting variations in sea levels with the development of ancient cultures such as the Soi Nhu and Ha Long cultures.

 

KARST GEOMORPHOLOGY VALUE

Due to a simultaneous combination of ideal factors such as thick, pale, grey, and strong limestone layers, which are formed by fine-grained materials; hot and moist climate and slow tectonic process as a whole; Hạ Long Bay has had a complete karst evolution for 20 million years. There are many types of karst topography in the bay, such as karst field.

 

Hạ Long Bay is a mature karst landscape developed during a warm, wet, tropical climate. The sequence of stages in the evolution of a karst landscape over a period of 20 million years requires a combination of several distinct elements including a massive thickness of limestone, a hot wet climate and slow overall tectonic up lift. The process of karst formation is divided into five stage is the formation of the distinctive do line karst. This is followed by the development of fengcong karst can be seen in the groups of hills on Bo Hon and Dau Be Inland. These cones with sloping side average 100m in height with the tallest exceeding 200m. Fenglin karst is characterised by steep separate towers. The hundreds of rocky islands with form the beautiful and famous landscape of the Bay are the individual towers of a classic Fenglin landscape where the intervening plains have been submerged by the sea. Most towers reach a height of between 50 and 100m with a height to width ratio of about 6. The karst dolines were flooded by the sea becoming the abundance of lakes that lie within the limestone islands. For example, Dau Be island at the mouth of the Bay has six enclosed lakes including those of the Ba Ham lakes lying within its fencong karst. The Bay contains examples of the landscape elements of fengcong, fenglin and karst plain. These are not separate evolutionary stages but the result of natural non – uniform processes in the denudation of a large mass of limestone. Marine erosion created the notches which in some places have been enlarged into caves. The marine notch is a feature of limestone coastline but, in Ha Long Bay, it has created the mature landscape.

 

Within Ha Long Bay, the main accessible caves are the older passages that survive from the time when the karst was evolving though its various stages of fengcong and fenglin. Three main types of caves can be recognized in the limestone islands (Waltham, T. 1998):

 

Remnants of old phreatic caves

Old karstic foot caves

Marine notch caves

 

The first group of caves is old phreatic caves which include Sung Sot, Tam Cung, Lau Dai, Thien Cung, Dau Go, Hoang Long, Thien Long. Nowadays, these caves lie at various high levels. Sung Sot cave is on Bo Hon island. From its truncated entrance chambers on allege high on the cliff, a passage of more that 10m high and wide descends to the south. Tam Cung is a large phreatic fissure cave that developed in the bedding planes of the limestone dividing the fissure cave into three chambers. Lau Dai is a cave with a complex of passages extending over 300m opening on the south side of Con Ngua island. Thien Cung and Dau Go are remnants of the same old cave system. They both survive in the northern part of Dau Go island at between 20 and 50m above sea level. Thien Cung has one large chamber more that 100m long, blocked at its ends and almost subdivided into smaller chambers by massive wall of stalactites and stalagmites. Dau Go is a single large tunnel descending along a major set of fractures to a massive choke.

 

The second group of caves is the old karstic foot caves which include Trinh Lu, Bo Nau, Tien Ong and Trong caves. Foot caves are a ubiquitous feature of karst landscapes which have reached a stage of widespread lateral undercutting at base level. They may extend back into maze caves of stream caves draining from larger cave systems within the limestone. They are distinguished by the main elements of their passages being close to the horizontal and are commonly related to denuded or accumulated terraces at the old base levels. Trinh Nu, which is one of the larger foot caves in Ha Long Bay with its ceiling at about 12m above sea level and about 80m in length, was developed in multiple stages. Bo Nau, a horizontal cave containing old stalactite deposits, cuts across the 25o dip of the bedding plane.

 

The third group is the marine notch caves that are a special feature of the karst of Ha Long Bay. The dissolution process of sea water acting on the limestone and erosion by wave action crates notches at the base of the cliffs. In advantageous conditions, dissolution of the limestone allows the cliff notches to be steadily deepened and extended into caves. Many of these at sea level extend right though the limestone hills into drowned dolines which are now tidal lakes.

 

A distinguishing feature of marine notch caves is an absolutely smooth and horizontal ceiling cut through the limestone. Some marine notch caves had been not formed at present sea level, but old sea levels related to sea level changes in Holocene transgression, event to Pleistocene sea levels. Some of them passed preserved the development of old karstic foot cave in mainland environment or preserved the remnants of older phreatic caves. One of the most unusual features of Ha Long Bay is the Bo Ham lake group of hidden lakes and their connecting tunnel – notch caves in Dau Be island. From the island’s perimeter cliff a cave, 10m wide at water level and curving so that it is almost completely dark, extends about 150m to Lake 1. Luon cave is on Bo Hon island and extends 50m though to an enclosed tidal lake. It has a massive stalactite hanging 2m down and truncated at the modern tidal level. It has passed though many stages in its formation.

 

The karst landscape of Ha Long Bay is of international significance and of fundamental importance to the science of geomorphology. The fenglin tower karst, which is the type present in much of Ha Long Bay, is the most extreme form of limestone landscape development. If these karst landscapes are broadly compared in terms of their height, steepness and number of their limestone towers, Ha Long Bay is probably second in the entire world only to Yangshou, in China. However, Ha Long Bay ha also been invaded by the sea so that the geomorphology of its limestone is lands are, at least in part, the consequence of marine erosion. The marine invasion distinguishes Ha Long Bay and makes it unique in the world. There are other areas of submerged karst towers which were invaded by the sea, but none is as extensive as Ha Long Bay.

 

TIMELINE OF GEOLOGIC EVOLUTION

Some of the most remarkable geological events in Hạ Long Bay's history have occurred in the last 1,000 years, include the advance of the sea, the raising of the bay area, strong erosion that has formed coral, and, pure blue and heavily salted water. This process of erosion by seawater has deeply engraved the stone, contributing to its fantastic beauty. Present-day Hạ Long Bay is the result of this long process of geological evolution that has been influenced by so many factors.

 

Due to all these factors, tourists visiting Hạ Long Bay are not only treated to one of the natural wonders of the world, but also to a precious geological museum that has been naturally preserved in the open air for the last 300 million years.

 

ECOLOGY

Halong Bay is host to two ecosystems: a tropical, moist, evergreen rainforest ecosystem; and a marine and coastal ecosystem. The bay is home to seven endemic species: Livistona halongensis, Impatiens halongensis, Chirita halongensis, Chirita hiepii, Chirita modesta, Paraboea halongensis and Alpinia calcicola.

 

The many islands that dot the bay are home to a great many other species, including (but likely not limited to): 477 magnoliales, 12 pteris, 20 salt marsh flora; and 4 amphibia, 10 reptilia, 40 aves, and 4 mammalia.

 

Common aquatic species found in the bay include: cuttlefish (mực); oyster (hào); cyclinae (ngán); prawns (penaeidea (tôm he), panulirus (tôm hùm), parapenaeopsis (tôm sắt), etc.); sipunculoideas (sá sùng); nerita (ốc đĩa); charonia tritonis (ốc tù và); and cà sáy.

 

ENVIRONMENTAL DAAGE

With an increasing tourist trade, mangroves and seagrass beds have been cleared and jetties and wharves have been built for tourist boats.

 

Game fishing, often near coral reefs, is threatening many endangered species of fish.

 

Local government and businesses are aware of problems and many measures have been taken to minimize tourism affect to the bay environment for sustainable economic growth like introducing eco friendly tours and introducing tight waste control on resorts.

 

AWARDS AND DESIGNATIONS

In 1962, the Vietnam Ministry of Culture, Sport and Tourism designated Hạ Long Bay a 'Renowned National Landscape Monument'.

 

Hạ Long Bay was first listed as a UNESCO World Heritage Site in 1994, in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognised Hạ Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated.

 

In October 2011, World Monuments Fund included the bay on the 2012 World Monuments Watch, citing tourism pressures and associated development as threats to the site that must be addressed. The goal of Watch-listing is to promote strategies of responsible heritage-driven development for a sustainable future.

 

In 2012, New 7 Wonders Foundation officially named Halong Bay as one of New Seven Natural Wonders of the world.

 

Hạ Long Bay is also a member of the Club of the Most Beautiful Bays of the World.

 

IN LITERATURE

In writings about Hạ Long Bay, the following Vietnamese writers said:

 

Nguyễn Trãi: "This wonder is ground raising up into the middle of the high sky".

Xuân Diệu: "Here is the unfinished works of the Beings...Here is the stones which the Giant played and threw away".

Nguyên Ngọc: "...to form this first- rate wonder, nature only uses: Stone and Water...There are just only two materials themselves chosen from as much as materials, in order to write, to draw, to sculpture, to create everything...It is quite possible that here is the image of the future world".

Ho Chi Minh: "It is the wonder that one cannot impart to others".

Phạm Văn Đồng: "Is it one scenery or many sceneries? Is it the scenery in the world or somewhere?".

Nguyễn Tuân: "Only mountains accept to be old, but Hạ Long sea and wave are young for ever".

Huy Cận: "Night breathes, stars wave Hạ Long's water".

Chế Lan Viên:

 

"Hạ Long, Bái Tử Long- Dragons were hidden, only stones still remain

On the moonlight nights, stones meditate as men do..."

Lord Trịnh Cương overflowed with emotion: "Mountains are glistened by water shadow, water spills all over the sky".

 

ANCIENT TALES

Hạ Long bay's inhabitants have developed numerous tales explaining names given to various isles and caves in the bay.

 

Đầu Gỗ cave (literally: "the end of wooden bars" cave): these wooden bars in this cave are the remnants of sharped wooden columns built under the water level by the order of Trần Hưng Đạo commander in order to sink Mongolian invaders' ships in the 13th century.

Kim Quy cave (literally: "Golden Turtle" cave): it is told that the Golden Turtle swam toward the Eastern Sea (international name: South China Sea) after returning the holy sword which had assisted King Lê Thái Tổ in the combat against Ming invaders from China. Next, with the approval of the Sea King, Golden Turtle continued to fight against monsters in this marine area. The turtle became exhausted and died in a cave. Consequently, the cave was named after the Golden Turtle.

Con Cóc isle (literally: Frog isle): is a frog- like isle. According to ancient tales, in a year of severe drought, a frog directed all animals to the Heaven and protested against the God. They demonstrated in favour of making rain. As a result, the God must accept the frog as his uncle. Since then, whenever frogs grind their teeth, the God has to pour water down the ground.

 

WIKIPEDIA

 

Invasive species vector of dengue fever, and coming from South-East Asia.

Numerous in the garden since 2 ou 3 days. It preferably attacks the ankles, at end of the afternoom. I had only to wait a tenth of seconds to get this picture.

 

Current distribution.

Aftershock of War

 

Description: Megistocera longipennis, identified by Cesar of Insetologia, is a species of true crane flies in the order Diptera, suborder Nematocera, infraorder Tipulomorpha, superfamily Tipuloidea, family Tipulidae and subfamily Tipulinae. Along with Megistocera longipennis, M. filipes are the only two known species in the genus Megistocera (Fabricius, 1805). Synonyms of M. longipennis include Megistocera tenuis (van der Wulp, 1885) and Tipula longipennis (Macquart, 1838). M. filipes has two subspecies; M. filipes filipes (Fabricius, 1805) and M. filipes fuscana (Wiedemann, 1820). The subject portrayed is a female, given the simple antennae.

 

www.gbif.org/species/1508704

 

www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN...

 

bugguide.net/node/view/116397

 

www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN...

 

A2 vein is short as it is in Trichocera, but straight.

Wings are windowed and possess an intricate network of veins with a small darker spot on their distal lateral margins. The body is brown and the wings, although translucent, possess shades of a rusty yellow. The thorax is robust and brown and the abdomen is slender and becomes more slender as it reaches the thorax. The legs are way longer than the body. The body's length, taking away the legs and the part of the wings extending beyond it, measured around 2cm. I don't know the measures of the whole body, including legs and wings, but it goes way beyond the body's length. Their eyes are large and compound, located on the terminal area of the head. The legs are most likely part of an evolutionary process that confers them the ability of landing on cylindrical stems and on the blades of leaves of Juncus sp. (Junaceae) ("rush") and Poaceae ("grasses"). Bucal parts are elongate, but are not developed to bite. Labellum is visible in the lateral view and is orangeish or brown; right at its back we can see the rostrum. I could note 6 dark antennal segments, followed by an orangeish or brown scape and pedicle. Maxillary palpi were dark colored; kind of hard to see how many segments they are made of, but seemingly four or five, with no reliability to this claim. They lack the scales on the wings that are characteristic to the true mosquitoes. They are great fliers and can land easily. They can also autotomize their legs when suffering from a predation attempt. Halteres are present as usual with Dipterans. You can see the technical terms for the venations of the wings here: drawwing.org/insect/megistocera-longipennis-wing

 

They are primarily Neotropical in distribution; their distribution can be seen as follows: USA (Texas, La, Fla); Argentina; Bolivia; Brazil; Cuba; Dominican Rep.; Guyana; Haiti; Jamaica; Paraguay; Peru; Puerto Rico; Suriname; Trinidad.

 

They are harmless. They do not possess a Culicid's rostrum, which means they can't bite. I do not know what are the feeding habits of this species, but it is known that many Tipulids do not feed at all, with the adults establishing themselves as part of the food chain in nature, serving as food for many birds, insects, Amphibians, Reptilians and more, and reproducing; this means that their larvae are important in the food chain and in other aspects as I will note afterwards and, as only around 2% of the larvae of Tipulids are known, they are still greatly understudied. However, many Tipulids are known to feed on nectar and act as pollinators to a great variety of plants. The larvae are known to be aquatic in most Tipulids, thriving in salty lagoons and multiple terrestrial habitats. Most of the larvae serve as decomposers of organic matter, acting as detritivores, while also being part of the food chain. Some predate other larvae and feed on roots. Some Tipulid's larvae feed on the larvae of mosquitoes such as Culicids. Thankfully, they are incredibly resistant to some pesticides.

 

Adults prefer humid areas with attenuated temperatures during the winter. The larvae of some species occur in salty ponds in desertic zones being able to withstand temperatures below the freezing point.

 

It is worth noting again that they are not hematophagous (they do not feed on blood, they can't even bite) and some species are predators of true mosquitoes. They are delicate and simply handling them can damage their legs, body and wings. The one in the picture was already found with the missing leg. A missing leg is not a great harm to a Tipulid, so long as the legs missed are very few.

 

This one was found on the 16th floor of a flat in an urban habitat during daytime (09:23:12am), which proves that Megistocera longipennis are able to fly relatively high. This exact species is very poorly known, and I couldn't find much information specific to them, to which I apologize as there seems to be no way for me to acquire information on them through the Internet, forcing me to go for exogenous resources which are not available to me at the moment - if these exist. If you know anything else about Megistocera longipennis, please tell me and I WILL credit you for the given information!

 

Lateral view here (my picture): flic.kr/p/26HKcVx

 

Other sources:

 

Tipulidae article on Wikipedia that seems very reliable: pt.wikipedia.org/wiki/Tipulidae

 

Article on Insetologia: www.insetologia.com.br/2018/06/mosquitao-tipulideo-no-cea...

 

Morphology of Tipulidae: www.ent.iastate.edu/dept/research/systematics/thai/head

 

PROJECT NOAH (Português): www.projectnoah.org/spottings/1383162418

This will be ratatouille. Not one of these pretty, pretty things has been near a shop. It's not luck. It was the goal!

 

Without falling foul of plagiarism these are the unashamedly quoted titles of two of Eliyahu Goldratt's epic business novels and the exposition of the Theory of Constraints.

 

At a time of spag bol made from thawed budget mince, the only house brand tinned tomatoes left in the supermarket, Chinese garlic…and ditto for the pasta because of mad hoarding, the sight of fresh fruit and vegetables may upset some viewers. It shouldn't. It's not luck and rushing down to the nursery to panic buy seedlings of basil now isn't going to get you a dinner like this.

 

What the Theory of Constraints will tell us is that there are bottlenecks. You work with them. One of those could very well be that now is the season of bountiful harvests planted with forethought months ago and what you sow now won't be on your plate for ages. Another bottleneck to riding out the misery of lockdown and social distancing is our erstwhile Government.

 

Here's a clue. Making a ratatouille like this requires two things: what is crudely termed the 6Ps in the military, and an ability to take risks.

 

Prior Planning Prevents Piss Poor Performance

 

Not being ready to tackle climate change, failing to put in place firefighting resources even though you were told you needed them, not upgrading the electricity grid so it could handle renewable sources, not building infrastructure like pumped hydro when you can get money for nothing, not having PPE, ventilators and ICU beds because actuaries not medicos run the health system is just a sample of the 6P fails brought to you by Government.

 

Why don't we have these things? Because investing in them requires foresight, that uncommon commodity common sense, and a willingness to take risks with something other than peoples' lives, you know like your precious, fantasy, utterly illusory budget surplus. More like a clergyman's surplice!

 

This sight for sore eyes and fibre starved bowels directly results from working with the 6Ps and taking a risk, expending effort and assets because there might be a reward. It could have all turned to custard. It didn't and the reward for daring is here to behold.

 

Could we get the Government to understand this endogenous solution to an exogenous problem? Yeah…nah!

The brightly colored and diminutive Granular Poison Frog from southern Costa Rica. Like many other Dendrobatids, this species acquires its skin toxicity by exogenous means. This is to say they obtain the toxic alkaloids from their prey. They consume a lot of prey and the poison (batrachotoxin) accumulates in the skin via a protein called alkaloid binding globulin.

Crospovidone has a coral-like appearance with a basophilic outer coat and a pink inner layer. It is an insoluble polymer of N-vinyl-2-pyrrolidone that is used as a disintegrant in pharmaceutical tablets. It embolizes to the lungs when aqueous suspensions of pulverized tablets are injected intravenously in drug abusers (IVDA) It is also found in the gastrointestinal tract following ingestion of various types of tablets. The precise architecture of histologically processed crospovidone can vary by medication. This and other features of crospovidone are very well discussed and illustrated in tinyurl.com/yajl3oru.

The very unusual feature of this case is that particles of crospovidone were also observed in the kidneys and brain indicating passage through the pulmonary capillaries. The size of the particle in one of the images of kidney is much larger than the diameter of the pulmonary capillaries thus raising the question of a possible pulmonary arteriovenous shunt.

 

Images contributed by Dr. Richard Jones - @forensicmed

 

Hạ Long Bay (Vietnamese: Vịnh Hạ Long, About this sound listen, literally: "descending dragon bay") is a UNESCO World Heritage Site, and a popular travel destination, in Quảng Ninh Province, Vietnam. Administratively, the bay belongs to Hạ Long City, Cẩm Phả town, and the part of Vân Đồn District. The bay features thousands of limestone karsts and isles in various sizes and shapes. Hạ Long Bay is a center of a larger zone which includes Bái Tử Long bay to the northeast, and Cát Bà islands to the southwest. These larger zones share similar geological, geographical, geomorphological, climate, and cultural characters.

 

Hạ Long Bay has an area of around 1,553 km2, including 1,960–2,000 islets, most of which are limestone. The core of the bay has an area of 334 km2 with a high density of 775 islets. The limestone in this bay has gone through 500 million years of formation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years under the impact of the tropical wet climate. The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. Hạ Long Bay is home to 14 endemic floral species and 60 endemic faunal species.

 

Historical research surveys have shown the presence of prehistorical human beings in this area tens of thousands years ago. The successive ancient cultures are the Soi Nhụ culture around 18,000–7000 BC, the Cái Bèo culture 7000–5000 BC and the Hạ Long culture 5,000–3,500 years ago. Hạ Long Bay also marked important events in the history of Vietnam with many artifacts found in Bài Thơ Mount, Đầu Gỗ Cave, Bãi Cháy.

 

500 years ago, Nguyễn Trãi praised the beauty of Hạ Long Bay in his verse Lộ nhập Vân Đồn, in which he called it "rock wonder in the sky".[8] In 1962, the Ministry of Culture, Sports and Tourism of North Vietnam listed Hạ Long Bay in the National Relics and Landscapes publication. In 1994, the core zone of Hạ Long Bay was listed by UNESCO as a World Heritage Site according to criterion vii, and listed for a second time according to criterion viii.

 

ETYMOLOGY

The name Hạ Long is derived from the Sino-Vietnamese 下龍, meaning "descending dragon".

 

Before 19th century, the name Halong Bay had not been recorded in the old books of our country. It has been called An Bang, Luc Thuy, Van Don... Late 19th century, the name Halong Bay has appeared on the Maritime map of France. "Haiphong News" published in French, has reported: " Dragon appears on Halong Bay". The story can be summarized as follows: In 1898, lieutenant Lagoredin captain of Avalangso met a couple of giant sea snake on Halong Bay three times. Not only the lieutenant but also many other sailors saw those species. The European thought that those animals looked like Asian dragon. Maybe the appearance of strange animals led to the name of Quang Ninh sea area today: Halong Bay

 

According to local legend, when Vietnam had just started to develop into a country, they had to fight against invaders. To assist the Vietnamese in defending their country, the gods sent a family of dragons as protectors. This family of dragons began spitting out jewels and jade. These jewels turned into the islands and islets dotting the bay, linking together to form a great wall against the invaders. Under magics, numerous rock mountains abruptly appeared on the sea, ahead of invaders' ships; the forward ships struck the rocks and each other. After winning the battle, the dragons were interested in peaceful sightseeing of the Earth, and then decided to live in this bay. The place where the mother dragon descended was named Hạ Long, the place where the dragon's children attended upon their mother was called Bái Tử Long island (Bái: attend upon, Tử: children, Long: dragon), and the place where the dragon's children wriggled their tails violently was called Bạch Long Vỹ island (Bạch: white-color of the foam made when Dragon's children wriggled, Long: dragon, Vỹ: tail), present day Trà Cổ peninsula, Móng Cái.

 

OVERVIEW

The bay consists of a dense cluster of some 1,600 limestone monolithic islands each topped with thick jungle vegetation, rising spectacularly from the ocean. Several of the islands are hollow, with enormous caves. Hang Đầu Gỗ (Wooden stakes cave) is the largest grotto in the Hạ Long area. French tourists visited in the late 19th century, and named the cave Grotte des Merveilles. Its three large chambers contain large numerous stalactites and stalagmites (as well as 19th century French graffiti). There are two bigger islands, Tuần Châu and Cát Bà, that have permanent inhabitants, as well as tourist facilities including hotels and beaches. There are a number of beautiful beaches on the smaller islands.

 

A community of around 1,600 people live on Hạ Long Bay in four fishing villages: Cửa Vạn, Ba Hang, Cống Tàu and Vông Viêng in Hùng Thắng commune, Hạ Long city. They live on floating houses and are sustained through fishing and marine aquaculture (cultivating marine biota), plying the shallow waters for 200 species of fish and 450 different kinds of mollusks. Many of the islands have acquired their names as a result of interpretation of their unusual shapes. Such names include Voi Islet (elephant), Ga Choi Islet (fighting cock), Khi Islet (monkey), and Mai Nha Islet (roof). 989 of the islands have been given names. Birds and animals including bantams, antelopes, monkeys, and lizard also live on some of the islands.

 

Almost all these islands are as individual towers in a classic fenglin landscape with heights from 50m to 100m, and height/width ratios of up to about six.

 

Another specific feature of Halong Bay is the abundance of lakes inside the limestone islands. For example, Dau Be island has six enclosed lakes. All these island lakes occupy drowned dolines within fengcong karst.

 

LOCATION

Hạ Long Bay is located in northeastern Vietnam, from E106°56' to E107°37' and from N20°43' to N21°09'. The bay stretches from Yên Hưng district, past Hạ Long city, Cẩm Phả town to Vân Đồn District, bordered on the south and southeast by the Gulf of Tonkin, on the north by China, and on the west and southwest by Cát Bà Island. The bay has a 120 km long coastline and is approximately 1,553 km² in size with about 2,000 islets. The area designated by UNESCO as the World Natural Heritage Site incorporates 434 km² with 775 islets, of which the core zone is delimited by 69 points: Đầu Gỗ island on the west, Ba Hầm lake on the south and Cống Tây island on the east. The protected area is from the Cái Dăm petrol store to Quang Hanh commune, Cẩm Phả town and the surrounding zone.

 

CLIMATE

The climate of the bay is tropical, wet, sea islands, with two seasons: hot and moist summer, and dry and cold winter. The average temperature is from 15 °C- 25 °C, and annual rainfall is between 2 meters and 2.2 meters. Hạ Long Bay has the typical diurnal tide system (tide amplitude ranges from 3.5-4m). The salinity is from 31 to 34.5MT in the dry season and lower in the rainy season.

 

HISTORY

SOI NHU CULTURE (16,000–5000 BC)

Located in Hạ Long and Bái Tử Long are archaeological sites such as Mê Cung and Thiên Long. There are remains from mounds of mountain shellfish (Cyclophorus), spring shellfish (Melania), some fresh water mollusc and some rudimentary labour tools. The main way of life of Soi Nhụ's inhabitants included catching fish and shellfish, collecting fruits and digging for bulbs and roots. Their living environment was a coastal area unlike other Vietnamese cultures, for example, like those found in Hòa Bình and Bắc Sơn.

 

CAI BEO CULTURE (5000–3000 BC)

Located in Hạ Long and Cát Bà island, its inhabitants developed to the level of sea exploitation. Cái Bèo culture is a link between Soi Nhụ culture and Hạ Long culture.

 

FEUDAL PERIOD

History shows that Hạ Long Bay was the setting for local naval battles against Vietnam's coastal neighbors. On three occasions, in the labyrinth of channels in Bạch Đằng River near the islands, the Vietnamese army stopped the Chinese from landing. In 1288, General Trần Hưng Đạo stopped Mongol ships from sailing up the nearby Bạch Đằng River by placing steel-tipped wooden stakes at high tide, sinking the Mongol Kublai Khan's fleet.

 

During the Vietnam War, many of the channels between the islands were heavily mined by the United States navy, some of which pose a threat to shipping to this day.

 

GEOLOGY AND GEOMORPHOLOGY

In 2000, the UNESCO’s World Heritage Committee has inscribed the Hạ Long Bay in the World Heritage List according to its outstanding examples representing major stages of the Earth’s history and its original limestone karstic geomorphologic features. The Hạ Long Bay and its adjacent areas consist of a part of the Sino-Vietnamese composite terrane having its development history from pre-Cambrian up to present day. During Phanerozoic, terrigenous, volcanogenic and cherty-carbonate sediments containing in abundance graptolites, brachiopods, fishes, corals, foraminiferas, radiolarias, bivalves and flora, separated one from another by 10 stratigraphic gaps, but the boundary between Devonian and Carboniferous has been considered as continuous. The limestone karstic geomorphology of the bay was developed since Miocene, especially the cone-shaped hills (fengcong), or isolated high limestone karst towers (fenglin) with many remnants of old phreatic caves, old karstic foot caves, marine notch caves form magnificent limestone karst landforms as unique on the world. The Quaternary geology was developed through 5 cycles with the intercalation of marine and continental environments. The present Hạ Long Bay, in fact, appeared after the Middle Holocene maximum transgression, leaving ultimate zone of lateral undercutting in the limestone cliffs bearing many shells of oysters, having the 14C age as 2280 to >40,000 y. BP. Geological resources are abundant: anthracite, lignite, oil shale, petroleum, phosphate, limestone and cement additives, kaolin, silica sand, dolomite, quartzite of exogenous origin, and antimony, mercury of hydrothermal origin. Besides, there still are surface water, groundwater and thermal mineral water on the shore of the Hạ Long - Bái Tử Long Bays and other environmental resources.

 

In terms of marine geology, this area is recorded as an especially coastal sedimentary environment. In the alkaline seawater environment, the chemical denudation process of calcium carbonate proceeds rapidly, creating wide, strangely shaped marine notches.

 

The bottom surface sediments are various from clay mud to sand, however, silty mud and clay mud are dominated in distribution. Especially, the carbonate materials originated from organisms make up from 60-65% sedimentary content. The surface sediments of coral reefs are mainly sand and pebbles of which the carbonate materials occupy for more than 90%. The intertidal zone sediments are various from clay mud to sand and gravel depending to distinguished sedimentary environments such as mangrove marshes, tidal flats, beaches etc. At the small, but wonderfully beautiful beaches, the sand sediments may be dominated quartz or carbonate materials.

 

The sediment layers of intertidal zone, the upper sea bed with a plain surface conserving ancient rivers, systems of caves and it's sediments, traces of ancient marine action forming distinctive notches, beaches and marine terraces, mangrove swamps are important evidence of geological events and processes taking place during Quaternary.

 

HISTORY OF TECTONICS

Hạ Long Bay has experienced at least 500 million years in various geological states of orogeny, marine transgression and marine regression. During the Ordovician and Silurian periods (500-410 million years ago), Hạ Long Bay was deep sea. During the Carboniferous and Permian periods (340-250 million years ago), Hạ Long Bay was at shallow sea level.

 

The dominated uplift movement of neotectonic and recent tectonic influenced deeply on topography of this area, and the present landscape of sea-islands was formed around 7 or 8 thousand years ago by the sea invasion during Holocene transgression begun at about 17-18 thousand years ago. Particularly from the Holocene time, from about 11,000 years ago Cat Ba - Hạ Long area has much archaeological evidence connecting variations in sea levels with the development of ancient cultures such as the Soi Nhu and Ha Long cultures.

 

KARST GEOMORPHOLOGY VALUE

Due to a simultaneous combination of ideal factors such as thick, pale, grey, and strong limestone layers, which are formed by fine-grained materials; hot and moist climate and slow tectonic process as a whole; Hạ Long Bay has had a complete karst evolution for 20 million years. There are many types of karst topography in the bay, such as karst field.

 

Hạ Long Bay is a mature karst landscape developed during a warm, wet, tropical climate. The sequence of stages in the evolution of a karst landscape over a period of 20 million years requires a combination of several distinct elements including a massive thickness of limestone, a hot wet climate and slow overall tectonic up lift. The process of karst formation is divided into five stage is the formation of the distinctive do line karst. This is followed by the development of fengcong karst can be seen in the groups of hills on Bo Hon and Dau Be Inland. These cones with sloping side average 100m in height with the tallest exceeding 200m. Fenglin karst is characterised by steep separate towers. The hundreds of rocky islands with form the beautiful and famous landscape of the Bay are the individual towers of a classic Fenglin landscape where the intervening plains have been submerged by the sea. Most towers reach a height of between 50 and 100m with a height to width ratio of about 6. The karst dolines were flooded by the sea becoming the abundance of lakes that lie within the limestone islands. For example, Dau Be island at the mouth of the Bay has six enclosed lakes including those of the Ba Ham lakes lying within its fencong karst. The Bay contains examples of the landscape elements of fengcong, fenglin and karst plain. These are not separate evolutionary stages but the result of natural non – uniform processes in the denudation of a large mass of limestone. Marine erosion created the notches which in some places have been enlarged into caves. The marine notch is a feature of limestone coastline but, in Ha Long Bay, it has created the mature landscape.

 

Within Ha Long Bay, the main accessible caves are the older passages that survive from the time when the karst was evolving though its various stages of fengcong and fenglin. Three main types of caves can be recognized in the limestone islands (Waltham, T. 1998):

 

Remnants of old phreatic caves

Old karstic foot caves

Marine notch caves

 

The first group of caves is old phreatic caves which include Sung Sot, Tam Cung, Lau Dai, Thien Cung, Dau Go, Hoang Long, Thien Long. Nowadays, these caves lie at various high levels. Sung Sot cave is on Bo Hon island. From its truncated entrance chambers on allege high on the cliff, a passage of more that 10m high and wide descends to the south. Tam Cung is a large phreatic fissure cave that developed in the bedding planes of the limestone dividing the fissure cave into three chambers. Lau Dai is a cave with a complex of passages extending over 300m opening on the south side of Con Ngua island. Thien Cung and Dau Go are remnants of the same old cave system. They both survive in the northern part of Dau Go island at between 20 and 50m above sea level. Thien Cung has one large chamber more that 100m long, blocked at its ends and almost subdivided into smaller chambers by massive wall of stalactites and stalagmites. Dau Go is a single large tunnel descending along a major set of fractures to a massive choke.

 

The second group of caves is the old karstic foot caves which include Trinh Lu, Bo Nau, Tien Ong and Trong caves. Foot caves are a ubiquitous feature of karst landscapes which have reached a stage of widespread lateral undercutting at base level. They may extend back into maze caves of stream caves draining from larger cave systems within the limestone. They are distinguished by the main elements of their passages being close to the horizontal and are commonly related to denuded or accumulated terraces at the old base levels. Trinh Nu, which is one of the larger foot caves in Ha Long Bay with its ceiling at about 12m above sea level and about 80m in length, was developed in multiple stages. Bo Nau, a horizontal cave containing old stalactite deposits, cuts across the 25o dip of the bedding plane.

 

The third group is the marine notch caves that are a special feature of the karst of Ha Long Bay. The dissolution process of sea water acting on the limestone and erosion by wave action crates notches at the base of the cliffs. In advantageous conditions, dissolution of the limestone allows the cliff notches to be steadily deepened and extended into caves. Many of these at sea level extend right though the limestone hills into drowned dolines which are now tidal lakes.

 

A distinguishing feature of marine notch caves is an absolutely smooth and horizontal ceiling cut through the limestone. Some marine notch caves had been not formed at present sea level, but old sea levels related to sea level changes in Holocene transgression, event to Pleistocene sea levels. Some of them passed preserved the development of old karstic foot cave in mainland environment or preserved the remnants of older phreatic caves. One of the most unusual features of Ha Long Bay is the Bo Ham lake group of hidden lakes and their connecting tunnel – notch caves in Dau Be island. From the island’s perimeter cliff a cave, 10m wide at water level and curving so that it is almost completely dark, extends about 150m to Lake 1. Luon cave is on Bo Hon island and extends 50m though to an enclosed tidal lake. It has a massive stalactite hanging 2m down and truncated at the modern tidal level. It has passed though many stages in its formation.

 

The karst landscape of Ha Long Bay is of international significance and of fundamental importance to the science of geomorphology. The fenglin tower karst, which is the type present in much of Ha Long Bay, is the most extreme form of limestone landscape development. If these karst landscapes are broadly compared in terms of their height, steepness and number of their limestone towers, Ha Long Bay is probably second in the entire world only to Yangshou, in China. However, Ha Long Bay ha also been invaded by the sea so that the geomorphology of its limestone is lands are, at least in part, the consequence of marine erosion. The marine invasion distinguishes Ha Long Bay and makes it unique in the world. There are other areas of submerged karst towers which were invaded by the sea, but none is as extensive as Ha Long Bay.

 

TIMELINE OF GEOLOGIC EVOLUTION

Some of the most remarkable geological events in Hạ Long Bay's history have occurred in the last 1,000 years, include the advance of the sea, the raising of the bay area, strong erosion that has formed coral, and, pure blue and heavily salted water. This process of erosion by seawater has deeply engraved the stone, contributing to its fantastic beauty. Present-day Hạ Long Bay is the result of this long process of geological evolution that has been influenced by so many factors.

 

Due to all these factors, tourists visiting Hạ Long Bay are not only treated to one of the natural wonders of the world, but also to a precious geological museum that has been naturally preserved in the open air for the last 300 million years.

 

ECOLOGY

Halong Bay is host to two ecosystems: a tropical, moist, evergreen rainforest ecosystem; and a marine and coastal ecosystem. The bay is home to seven endemic species: Livistona halongensis, Impatiens halongensis, Chirita halongensis, Chirita hiepii, Chirita modesta, Paraboea halongensis and Alpinia calcicola.

 

The many islands that dot the bay are home to a great many other species, including (but likely not limited to): 477 magnoliales, 12 pteris, 20 salt marsh flora; and 4 amphibia, 10 reptilia, 40 aves, and 4 mammalia.

 

Common aquatic species found in the bay include: cuttlefish (mực); oyster (hào); cyclinae (ngán); prawns (penaeidea (tôm he), panulirus (tôm hùm), parapenaeopsis (tôm sắt), etc.); sipunculoideas (sá sùng); nerita (ốc đĩa); charonia tritonis (ốc tù và); and cà sáy.

 

ENVIRONMENTAL DAAGE

With an increasing tourist trade, mangroves and seagrass beds have been cleared and jetties and wharves have been built for tourist boats.

 

Game fishing, often near coral reefs, is threatening many endangered species of fish.

 

Local government and businesses are aware of problems and many measures have been taken to minimize tourism affect to the bay environment for sustainable economic growth like introducing eco friendly tours and introducing tight waste control on resorts.

 

AWARDS AND DESIGNATIONS

In 1962, the Vietnam Ministry of Culture, Sport and Tourism designated Hạ Long Bay a 'Renowned National Landscape Monument'.

 

Hạ Long Bay was first listed as a UNESCO World Heritage Site in 1994, in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognised Hạ Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated.

 

In October 2011, World Monuments Fund included the bay on the 2012 World Monuments Watch, citing tourism pressures and associated development as threats to the site that must be addressed. The goal of Watch-listing is to promote strategies of responsible heritage-driven development for a sustainable future.

 

In 2012, New 7 Wonders Foundation officially named Halong Bay as one of New Seven Natural Wonders of the world.

 

Hạ Long Bay is also a member of the Club of the Most Beautiful Bays of the World.

 

IN LITERATURE

In writings about Hạ Long Bay, the following Vietnamese writers said:

 

Nguyễn Trãi: "This wonder is ground raising up into the middle of the high sky".

Xuân Diệu: "Here is the unfinished works of the Beings...Here is the stones which the Giant played and threw away".

Nguyên Ngọc: "...to form this first- rate wonder, nature only uses: Stone and Water...There are just only two materials themselves chosen from as much as materials, in order to write, to draw, to sculpture, to create everything...It is quite possible that here is the image of the future world".

Ho Chi Minh: "It is the wonder that one cannot impart to others".

Phạm Văn Đồng: "Is it one scenery or many sceneries? Is it the scenery in the world or somewhere?".

Nguyễn Tuân: "Only mountains accept to be old, but Hạ Long sea and wave are young for ever".

Huy Cận: "Night breathes, stars wave Hạ Long's water".

Chế Lan Viên:

 

"Hạ Long, Bái Tử Long- Dragons were hidden, only stones still remain

On the moonlight nights, stones meditate as men do..."

Lord Trịnh Cương overflowed with emotion: "Mountains are glistened by water shadow, water spills all over the sky".

 

ANCIENT TALES

Hạ Long bay's inhabitants have developed numerous tales explaining names given to various isles and caves in the bay.

 

Đầu Gỗ cave (literally: "the end of wooden bars" cave): these wooden bars in this cave are the remnants of sharped wooden columns built under the water level by the order of Trần Hưng Đạo commander in order to sink Mongolian invaders' ships in the 13th century.

Kim Quy cave (literally: "Golden Turtle" cave): it is told that the Golden Turtle swam toward the Eastern Sea (international name: South China Sea) after returning the holy sword which had assisted King Lê Thái Tổ in the combat against Ming invaders from China. Next, with the approval of the Sea King, Golden Turtle continued to fight against monsters in this marine area. The turtle became exhausted and died in a cave. Consequently, the cave was named after the Golden Turtle.

Con Cóc isle (literally: Frog isle): is a frog- like isle. According to ancient tales, in a year of severe drought, a frog directed all animals to the Heaven and protested against the God. They demonstrated in favour of making rain. As a result, the God must accept the frog as his uncle. Since then, whenever frogs grind their teeth, the God has to pour water down the ground.

 

WIKIPEDIA