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                                             Richat Structure in Mauritania

 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.

Richat Structure in Mauritania

             Animated NASA logo in which the orbit element circles the word NASA. On subsidiary pages, clicking on this graphic returns you to the NASA Home page, http://www.nasa.gov.   Courtsey of NASA

 		  
   
   
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