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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Planetobserver |
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