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Anonymous (nd) Earth’s Bulls-Eye, the Eye of Africa, Landmark for Astronauts. Love These Pics; Anonymous (nd) Richat Structure, Mauritania NASA Earth Observatory; Discovery - Richat's Enigma (French), a video documentary from Radio Canada. Nemiroff, R., and J. Bonnell (2002) Earth's Richat Structure, Astronomy Picture of the Day, October 28 ...
The Richat Structure in the Sahara Desert of Mauritania. Once considered to be an impact structure, it is now classified as a geologic dome uplifted by an underlying igneous intrusion. Structural dome on Baffin Island, seen in a planation surface. Oblique aerial photo of Upheaval Dome, Utah.
Richat Structure, Mauritania The Richat Structure in Mauritania has also been proposed as the site of Atlantis. [ 56 ] This structure is generally considered to be a deeply eroded domal structure that overlies a still-buried alkaline igneous intrusion . [ 57 ]
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The Richat Structure in Mauritania is not an impact crater, but rather a eroded anticline. It is 50km across, and shown in here in a topographic reconstruction (scaled 6:1 on the vertical axis) from sattelite photos. False coloring as follows: bedrock=brown, sand=yellow/white, vegetation=green, salty sediments=blue
Ouadane is the closest town to the Richat Structure, a massive circular landmark visible from space. The whole Ouadane commune has a total size of 118,210 km², mostly consisting of desert. The main town is located in the south-west of the commune.
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Guelb er Richat structure. With a diameter of almost 50 kilometers (31 mi), it has become a landmark for Space Shuttle crews. Initially interpreted as a meteorite impact structure because of its high degree of circularity, it is now thought to be merely a symmetrical uplift (circular anticline) that has been laid bare by erosion.