Known as the “Eye of the Sahara," the Richat Structure in northwestern Mauritania is a circular geologic feature thought to be caused by an uplifted dome.
iss061e012458 (Oct. 20, 2019) — Known as the “Eye of the Sahara,” the Richat Structure in northwestern Mauritania is a circular geologic feature 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.