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Richat Structure in Mauritania
This page contains archived content and is no longer being updated. At the time of publication, it represented the best available science. However, more recent observations and studies may have rendered some content obsolete.
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