We spent New Year in the "Eye of Africa"...700 km from Nouakchott with stops at Chinguetti and the ancient caravan city of Ouadane. Sun going down over the west wall of the "Eye" on the last day of 2021:
The Eye is pictured from space here..
It is a complex structure. The Atlas Mountains in Morocco and Algeria are in fact an extension of the Appalachians. But this dome has sedimentary rocks on the outside and violent igneous indications on the inside. Geologists have had a hard time explaining it. It just took a DGS contributor a minute to figure it out. It's an indication of previous earth giants shooting sporting clays. Elementary my dear Doctor. (Way too much drop for Stanton).