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«Zumaia es como un lugar religioso para los geólogos». Esta frase la pronunció Bruce Runnegar, director de Astrobiología de la NASA, tras su visita a los acantilados situados entre Zumaia y Deba.
Con esta definición el experto norteamericano no hacía más que corroborar un hecho conocido por la comunidad científica internacional. La rasa mareal, el flysch situado en este tramo de ocho kilómetros de la costa guipuzcoana presenta un extraordinario interés geológico.
El afloramiento de los estratos permite leer en ellos 50 millones de años de la tierra. Allí están registrados todos los cambios climáticos, geológicos y biológicos producidos en ese enorme lapso de tiempo.
“I am no blank slate for love to write on.
My heart has walls marred with cracks,
bloodstains, and bullet holes;
graffitied over by past lovers.”
― John Mark Green
Visit Tabula Rasa by Theda Tammas
En las profundidades de la Vall d'Ora, en la comarca leridana del Solsonés, y por terreno bastante agreste y vírgen, se esconde este pequeño barranco repleto de sedimentos calcáreos y bonitas pozas con cristalinas aguas de color esmeralda. Más que en el Prepirineo, uno siente por algunos momentos haberse teletransportado a las selvas de Costa Rica.
Panorámica de 4 tomas verticales. Trípode, disparador remoto, polarizador circular.
Lagoa Rasa is one of 7 volcanic lakes found in the highlands on the Island Of Flores in the Azores. The lakes are the result of activity in one of 3 major volcanic centers. Lagoa Rasa (Shallow Lagoon) is located in the southern most volcanic center near Lagoa Funda (Deep Lagoon). The later lake sits at an elevation of 500 meters above sea level while Lagoa Rasa sits next to it but some 150 meters higher in elevation. Lagoa Raza formed in the last stage of volcanic activity in the Lagoa Funda Volcanic Center around 3254 years before present. Geologically Lagoa Raza is a maar. These geological features are low-relief, broad volcanic craters formed during shallow explosive eruptions. These explosions are usually caused by the heating and boiling of groundwater when magma invades the groundwater table. When both magma and water are involved, volcanologists refer to the explosions as Phreatomagmatic eruptions. The low cone around the crater is formed of ash and rock particles ejected during the explosions. The resultant rock is often referred to as a pyroclastic rock. The volcanic ash is called tuff and, here because of the size of the ash particles in this cone, it is referred to as lapilli tuff. As often happens with maars, the ones on Flores are often filled with lakes. A scoria cone (cinder cone) rises in the background.
References:
www.diariesofmagazine.com/lagoons-flores-island-azores/
volcanoes.usgs.gov/vsc/glossary/maar.html
www.nps.gov/articles/000/maars-and-tuff-rings.htm
www.sciencedirect.com/science/article/pii/S03770273220023...
Rasa mareal bajo el área recreativa de Elorriaga.
Foto tomada en invierno con filtro de densidad neutra para obtener una exposición de 1.5 seg.
La foto es de ayer.
Playa de Itzurun , Zumaia
Es increíble ver y estar sobre estas placas, con las olas rompiendo sobre ellas, algo único, fantástico.
por vezes, o que reflete supera o refletido!
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[170,0 mm] [1/250s] [f/ 11.0] [ISO 200] NIKON D90
são lambretas... são afroidisíacas... são deliciosas... mas estão vivas, e dentro d'água... não tenho coragem de pegá-las !
: )))
The North America Nebula, NGC 7000, is an emission nebula in the constellation Cygnus. Above is the Pelican Nebula (enlarged on the 2nd image). Together the area of this nebula reaches 5 full moons across and can be seen with the unaided eye in a dark sky location.
This target was shot with using a high speed, wide field 400mm telescope coupled with a 26 Megapixel cooled camera from my light polluted backyard.
Data
Camera: ASI2600MC-Pro
Telescope: Celestron RASA 8
Focal Length: 400mm
Aperture: f/2
Mount: Celestron CGX
Filter: Celestron RASA LPS
Frames: 187X30sec
Gain: 0 Offset: 10
OAT: 19°C
Camera Temp: -10°C
Guiding: ASI290MM
Bias: 50 frames
Darks: 50 frames
Flats: 50 frames
Post Processing: Pixinsight, PS, LR
Fantástico lugar, hay que andar con cuidado, con las aristas y las olas.
Playa de Itzurun, Zumaia, Guipúzcoa
I will fight the system, break it down and redesign it
I don't want anything the way it's created by them
Where is my right to choose, if all the options are theirs?
We can be the system, it will turn and try to own us
We can have everything, if we will change into them
Now it's our time to choose, which of the options are theirs.
[SOEN - Tabula Rasa]
Photo: Maurizio Coppola
A wide field of Bodes and the Cigar Galaxy surrounded by other galaxies, dust and stars from our own Milky Way. Captured from my light polluted backyard Bortle 5-6.
I apologize for my lack of posts lately my CGX mount was hampering my clear nights of imaging with poor guiding and tracking which makes capturing the details of the night sky rather challenging. The new mount will be arriving soon and I look forward to seeing what it can do.
Camera: ASI2600MC-Pro
Telescope: Celestron RASA 8
Aperture: f2.0
Mount: Celestron CGX
Filter: RASA8 LPS (Astrodon)
Frames: 503X30sec
Gain: 0 Offset: 10
OAT: 8°C
Camera Temp: -20°C
Guiding: ASI290MC
Darks: 50 frames
Flats: 50 frames
Post Processing: Pixinsight, PS, LR
LEGAL DISCLAIMER: I Do Not Condone Any Acts Of Vandalism Nor Do I Participate In Such Criminal Activity. I Am Simply An Observant and Take Photos Of This Graffiti You Have Come Across. ALSO I Will Not Condone Any Usage Of My Photos To Support Any Legal Matter Involving These Acts Of Vandalism Therefore YOU ARE NOT WELCOME TO VIEW OR TAKE THIS MATERIAL For ANY Purpose...
Here's the second in my series of objects shot with the RASA8 during our recent clear stretch (also from my light-polluted backyard).
Taking flat frames with the RASA turned out to be very easy: After I parked the scope (towards Polaris and safely away from the Sun!!), I just shot my flats pointed right at the clear, blue sky.
The advantage to this method is that it's incredibly simple - no need to set up a flat panel or figuring out how to get a flat panel to sit on top of the gear at the front of the RASA. The disadvantage is that your color balance will be MAJORLY messed up in your calibrated frames. Fortunately, you can recover the white balance in post-processing. :-)
Image details:
60x2min
=2 hrs integration time
Celestron RASA 8" f/2 Astrograph
Celestron RASA Light Pollution Reduction filter
ZWO ASI294MC-Pro Camera @ -15-degrees C
QHY Mini guide scope with ZWO178MC guide camera.
Sequence Generator Pro
PHD2
Stacking, HDR Composition, and additional processing with PixInsight
Background gradient removal with AstroPixelProcessor
Location: Central District, Seattle
Mystical autumn moments in the Allgäu Alps.
Thanks for coming, I wish all of you a wonderful Christmas Time.
Nikon D7200; Sigma 17-50 f/2.8 EX DC OS HSM
17 mm; f/7.1; 1/60 s; ISO 200
Rasa Vitalia's article:Viva la Carnaval! Viva la Belly Dance! San Francisco Carnaval 2010
bellydancershabibi.wordpress.com/2010/07/03/viva-la-carna...