Richat Structure, satellite image

Richat Structure, satellite image

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Caption: Richat Structure, Mauritania, satellite image. North is at top. The Richat Structure (just left of centre) is a geological formation in the Sahara's Maur Adrar Desert in 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. The structure's diameter is about 50 kilometres. Image data obtained on 13 January 1987.

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Keywords: 1900s, 1980s, 1987, 20th century, africa, african, desert, earth observation, earth science, environment, eroded, erosion, erosion feature, from space, geographical, geography, geological, geology, january, maur adrar desert, mauritania, mauritanian, nature, physical geography, richat structure, sahara, satellite, satellite image, volcanic dome

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