The Richat Structure, “Eye of the Sahara”, Mauritania. Photo courtesy of NASA.
The Richat Structure, “Eye of the Sahara”, Mauritania. Photo courtesy of NASA.
The Richat Structure
The Geological Society Blog
The Richat Structure, “Eye of the Sahara”, Mauritania. Photo courtesy of NASA.
The Richat Structure, “Eye of the Sahara”, Mauritania. Photo courtesy of NASA.
The Geological Society Blog 
