#anticline

[cordially-stupid]

Hello fellow geology enthusiasts! I've finished my structural class and have now put some of my homework on my redbubble! link is to the socks version >:3 Enjoy!

[inceptionpositivity]

@strangegeology - You are just... unbelievably cool. I don't know what it is about you - whether it's how nice you are, whether it's your incredible talent in writing - I don't know but you give VIBES that are just rad. I'm so glad you're here with us in the fandom, your writing has been some of the best pieces I've read and I'm in awe of you! I hope you are having a great day!!!!

[trying-geology]

Y’all look at this fold we saw in Arkansas over fall break within the Ouachita Mountains!

[earthstory]

Waterpocket fold This image captures one of the dominant geologic features of Capitol Reef National Park and was shared by the US Geological Survey. This is the Strike Valley Overlook, which has a view along the layers on the side of Waterpocket Fold.

The Waterpocket Fold is an anticline, a geologic feature formed when rocks are folded upwards. You may note that this is a valley, a surprising landform to find if the rocks have been folded upward, but there is one more detail that controls the shape of the valley we see. When rocks fold bend, the rocks at the hinge of the fold are put under stress. The rocks at the widest part of the fold are pulled apart and the rocks at the core of the fold are squeezed. Both of these cases – rocks under tension and compression – can cause the rocks to fracture. When cracks form, water can get into the rocks and erode them away. Large anticlines commonly are found with their cores eroded away because those rocks are fractured and easily eroded, while the tilted hinges remain in tact as exposed, dipping layers, just as seen here. The exposed rocks are Jurassic and Cretaceous aged sedimentary rocks, marking times from when the U.S. Southwest went from being a desert filled with sand dunes to a time when it was submerged beneath the waters of an inland seaway. -JBB Image credit: USGS/Ida & Leo https://flic.kr/p/wYcF4x Read more: http://www.nps.gov/care/learn/nature/geology.htm

[wenbochenphoto]

Almost perfect! (northern Peru).

[drrockclub]

Folding

Sedimentary layering in rocks helps to clearly visualize deformations that the rock has undergone. Here, we can see a result of compression applied in sideways fashion (from the sides), this causes the rock to buckle without breaking and a series of anticlines and synclines (concave and convex structures).

Qinling Mountains, China

[nemfrog]

“A rotating straticulate spheroid.” The American journal of science. 1919. 

[wigmund]

From NASA Earth Observatory Image of the Day; April 29, 2018:

Richat Structure

The Richat Structure of Mauritania has captured the attention of astronauts for about as long as NASA has sent humans into orbit around Earth. This circular geologic feature is thought to be caused by an uplifted dome—geologists would classify it as a domed anticline—that has been eroded to expose the originally flat rock layers.

In this type of geologic structure, rocks exposed in the center of the “bullseye” are older than rocks forming the outer rings. This structure measures 45 kilometers (28 miles) across and is made up of igneous and sedimentary rocks. There are several faults visible (lower left) where strata that were once continuous have been shifted apart.

Most of Mauritania lies within the Sahara Desert, where dry climate conditions and periodic droughts create difficult living conditions. Approximately 3.7 million people live in Mauritania, though much of the population lives along its Atlantic coastline, about 500 kilometers (300 miles) from the Richat Structure.

Astronaut photograph ISS030-E-12516 was acquired on December 17, 2011, with a Nikon D2Xs digital camera using a 400 millimeter lens and is provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center. The image was taken by a member of the Expedition 30 crew. The image has been cropped and enhanced to improve contrast, and lens artifacts have been removed. The International Space Station Program supports the laboratory as part of the ISS National Lab to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by Andrea Meado, Jacobs Technology, JETS Contract at NASA-JSC. Instrument(s): ISS - Digital Camera