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Anonymous File :-(, x)
Intersting. I'd never seen this feature before, so I did some reasearch.
>>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. This image was acquired by Landsat 7's Enhanced Thematic Mapper plus (ETM+) sensor on January 11, 2001. This is a false-color composite image made using shortwave infrared, infrared, and green wavelengths. The image has also been sharpened using the sensor's panchromatic band. Coutesy : NASA - Earth Observatory
The arrow in the pic shows where it is in relation to Africas west coast.
Pic sauce- http://earth.esa.int/cgi-bin/satimgsql.pl?show_url=127 Maybe someone wants to dl the 57 mb version and resize for us?
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