This oblique view from 255 miles above northwest Africa, looking from north to south, shows the "Eye of Sahara" in Mauritania.
iss059e027887 (April 21, 2019) — This oblique view from 255 miles above northwest Africa, looking from north to south, shows the “Eye of Sahara” in Mauritania. The circular geologic feature, also known as the Richat Structure, 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.