View allAll Photos Tagged fault
This is a seismogram from the Davao seismic station in the Philippines. The noise was caused by a magnitude 6.4 offshore earthquake that occurred in the Manila Trench area west of southern Luzon Island in the Philippines at 5:05 AM, local time, on 14 March 2022. The epicenter was about 75 kilometers west-northwest of Cabra Island. The hypocenter was about 11 kilometers deep. Shaking resulted from normal faulting along a north-northwest to south-southeast striking fault zone.
The islands of the Philippines are a volcanic arc formed along two subduction zones. On the eastern side of the islands, the Philippines Plate is subducting westward. On the western side of the islands, the Sunda Plate is subducting ~eastward. Earthquakes and volcanoes are common in the area.
--------------------------------
Info. at:
earthquake.usgs.gov/earthquakes/eventpage/us6000h48d/exec...
and
en.wikipedia.org/wiki/Manila_Trench
--------------------------------
An earthquake is a natural shaking or vibrating of the Earth caused by sudden fault movement and a rapid release of energy. Earthquake activity is called "seismicity". The study of earthquakes is called "seismology". The actual underground location of an earthquake is the hypocenter, or focus. The site at the Earth's surface, directly above the hypocenter, is the epicenter. Minor earthquakes may occur before a major event - such small quakes are called foreshocks. Minor to major quakes after a major event are aftershocks.
Most earthquakes occur at or near tectonic plate boundaries, such as subduction zones, mid-ocean ridges, collision zones, and transform plate boundaries. They also occur at hotspots - large subsurface mantle plumes (Examples: Hawaii, Yellowstone, Iceland, Afar).
Earthquakes generate four types of shock waves: P-waves, S-waves, Love waves, and Rayleigh waves. P-waves and S-waves are body waves - they travel through solid rocks. Love waves and Rayleigh waves travel only at the surface - they are surface waves. P-waves are push-pull waves that travel quickly and cause little damage. S-waves are up-and-down waves (like flicking a rope) that travel slowly and cause significant damage. Love waves are side-to-side surface waves, like a slithering snake. Rayleigh waves are rotational surface waves, somewhat like ripples from tossing a pebble into a pond.
Earthquakes are associated with many specific hazards, such as ground shaking, ground rupturing, subsidence (sinking), uplift (rising), tsunamis, landslides, fires, and liquefaction.
Some famous major earthquakes in history include: Shensi, China in 1556; Lisbon, Portugal in 1755; New Madrid, Missouri in 1811-1812; San Francisco, California in 1906; Anchorage, Alaska in 1964; and Loma Prieta, California in 1989.
Day 315:
When I look back at the photographs I first posted when I was just using my webcam and knowing so little about how to really use photoshop, I am amazed at how far I have come, not with photography, but where I am mentally. Even though I am amazed at how far I have come, I am even more amazed how easily I could slip back to where I was... and what I am most amazed at is how no only how easily I could slip back into that state, but how most days I desire it.
Facebook:
www.facebook.com/pages/JP-Photography/194567403894853?ref=ts
Tumblr:
Mormon Rocks - Photographed on a rainy mist day.
These sandstone rock formations, created by compression and shearing along the San Andreas Fault. Cajon Pass is a mountain pass between the San Bernardino Mountains and the San Gabriel Mountains in Southern California
The spectacular white arkosic hogbacks called Mormon Rocks are part of the Cajon Valley Beds.
Both arkosic units sit unconformably on a marine
formation that had been referred to the San Franscisquito. Woodburne and Golz (1972) pointed out the
lithologic differences in the underlying marine formation, and the presence of an elasmosaur relegated
the Cajon portion of those beds to a Cretaceous age (Lucas and Reynolds, 1991). Woodburne and Golz
(1972) demonstrated that the age of the Devils Punchbowl arkose was late Miocene (Clarendonian–
Hemphillian NALMA), while vertebrate fossils in the Cajon Valley beds were middle Miocene
(Hemingfordian–Barstovian NALMA).
geology.csupomona.edu/janourse/ArticlesAbstracts/SCGS%20E...
Mormon Rocks Interpertive Trail is a 1 mile loop trail located near San Bernardino, California that offers scenic views and is good for all skill levels. Named after Mormon pioneers and freighters who completed their trip across the Mojave in 1851 on they way to the lush and fertile valley of San Bernardino...Gold was discovered in nearby Bear Valley and Holcomb valley turning San Bernardino into a typical Wild West town of pioneers.
This late Tertiary fault places Tertiary (11 ma) Bear Canyon Conglomerate against Jurassic, amphibolite-grade, gold-bearing gneiss in the Vista Pit. Water is perched in the sediments above the bedrock. Mesquite gold mine in southeastern California.
A cut-and-polished chunk of the Triassic New Oxford formation from Frederick, Maryland. This breccia is the product of faulting during the failed Triassic rift that created the down-dropped Frederick valley. It includes mostly angular Cambrian limestone and quartz fragments in a red mudstone matrix. This stuff was jokingly nick-named Rosie's Dinerite because at the time (before the area became completely built up and obliterated by progressive urbanization) there were some exceptional outcrops of it behind Rose's Diner on Route 40 just west of Frederick.
Fault cutting through Pennsylvanian rocks in Ohio, USA.
"Lowellville Shale" is the nickname used here for dark-colored mudshales overlying the Lowellville Limestone in the Pottsville Group of northeastern Ohio, USA.
Just above the Lowellville Limestone at the Beach City Dam outcrop, the Lowellville Shale is fissile to flaggy, fossiliferous, black calcareous shale. Above that is non-flaggy, sparsely-fossiliferous, incompetent, black calcareous shale. Observed fossils include Posidonia bivalves, Trepospira gastropods, crinoid stem columnals, straight-shelled nautiloid cephalopods, coiled cephalopods, plants, and horizontal burrows.
The Lowellville Shale and underlying Lowellville Limestone are part of the Pottsville Group, a Pennsylvanian-aged cyclothemic succession in eastern Ohio that contains nonmarine shales, marine shales, siltstones, sandstones, coals, marine limestones, and chert ("flint"). The lower Pottsville dates to the late Early Pennsylvanian. The upper part dates to the early Middle Pennsylvanian. The Lower-Middle Pennsylvanian boundary is apparently somewhere near the Boggs Member (?).
The outcrop shown above is dominated by black shales. The light-colored material at center is part of a laterally-discontinuous, micritic limestone nodule horizon. The left side of this nodule has been truncated by a fault. Faults are fractures in rocks along which differential displacement has occurred. Dip-slip faults are those involving movement of rocks in non-horizontal directions. The two common types of dip-slip faults are normal faults and reverse faults.
Stratigraphy: Lowellville Shale, just above the Lowellville Limestone, Pottsville Group, upper Lower Pennsylvanian
Location: Beach City Dam outcrop - exposure on the southern side of Sugar Creek, immediately downstream from Beach City Dam, northern Franklin Township, northwestern Tuscarawas County, northeastern Ohio, USA (40° 38’ 06.71” North latitude, 81° 33’ 21.80” West longitude)
A level crossing fault meant that the signaller stopped the Gatwick-bound train on the left at the station, while the 0824 to Dorking arrives on 22 January 2013.
6-12-09/Day 99
I had a minor car accident this afternoon that was 100% my fault. I was trying to parallel park (which I'm generally pretty good at) on the street next to my gym, which has an incline. I don't like to park on inclines, and I had taken a break from it for a while, but recently started doing it again. (I will be going back on the wagon following today's incident.) So, while I was adjusting my car, I must have thought I had put the car in drive (but it was actually still in reverse), and when I took my foot off of the brake and my car started rolling back, I quickly hit the gas to pull forward and not hit the car behind me. But of course I ended up ramming the car behind me pretty good. That totally sucked. The guy whose car it was was actually in the car when it happened. There was damage to his car (which I found out he had just bought 2 days ago), but apparently none to mine.
I'm grateful that he was nice and didn't go off on me. I'm grateful that, although new to him, it was not a new or luxury car that I hit. I'm grateful that I have car insurance. I'm grateful that neither of us was hurt. I'm grateful that I didn't start crying, or otherwise revert to feeling like a helpless little girl. I took responsibility for my mistake, called the insurance company, and pretty much done everything I can do at this point to make restitution.
I was telling a friend this evening that I felt ashamed, and like that was a really dumb thing I did. She shrugged her shoulders and very matter-of-fact-ly said, "Mistakes are dumb!" The same friend brought up karma, and suggested that it's possible that this incident will be a link in the chain that leads this guy to his future wife; we just don't know. I hope it all goes smoothly for both of us, regardless.
These fault may represent 'soft-sediment' deformation related to dewatering of the sandstone - opinions differ. No broken grains may be observed along the faults, it looks like grains have rolled instead of fractured.
It rained last night. Not too much ice, but it was cold enough to freeze on the roof of the car this morning. Made some neat patterns.
Experimenting with slight variations of film speed.
Film: Ilford HP5+
Developer: Ilfotec LC-29 1+19
Time: 8:10 @ 20C
Front Camera
No doubt about the location of the fault here. Unfortunately the fault doesn't look like much here.
Plenty detail, zoom in and see.
We had it tough in our coalfield compared to most others, that's why Lancashire mining engineers became so highly skilled and developed so many technical advances of national importance. Dealing with faults from a few inch to 600 yards was all part of the challenge, or the "art of mining".
Plan drawn up in 1958 for H.E.Clegg's Presidential address to the Manchester Geological Society Branch of the Institute of Mining Engineers (Vol 117 Part 2)