images

Richat structure, Mauritania, seen by Landsat-7 satellite

by

USGS/Novapix

Reference

t-afmau-00001

Date

2006-09-22

The so-called Richat Structure is a geological formation in the Maur Adrar Desert in the African country of Mauritania. Although it resembles an impact crater, the Richat Structure formed when a volcanic dome hardened and gradually eroded, exposing the onion-like layers of rock. Jan 11 2001.