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The Richat Structure, or Guelb er Richât (Arabic: قلب الريشات, romanized: Qalb ar-Rīšāt, Hassaniyya: [galb er.riːʃaːt] ⓘ), is a prominent circular geological feature in the Adrar Plateau of the Sahara. It is located near Ouadane in the Adrar Region of Mauritania.
Guelb er Richat structure. With a diameter of almost 50 kilometers (31 mi), it has become a landmark for Space Shuttle crews. Initially interpreted as a meteorite impact structure because of its high degree of circularity, it is now thought to be merely a symmetrical uplift (circular anticline) that has been laid bare by erosion.
The concentric Guelb er Richat is a prominent feature of the north-central region. Kediet ej Jill , near the city of Zouîrât , has an elevation of 915 metres (3,000 ft) and is the highest peak. The plateaus gradually descend toward the northeast to the barren El Djouf , or "Empty Quarter," a vast region of large sand dunes that merges into ...
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Created Date: 8/30/2012 4:52:52 PM
The Guelb Aouelloul crater is 3.1 million-old impact crater which was studied by the noted Saharan scholar Théodore Monod. To the east beyond Ouadane is the distinctive Richat Structure , an uplifted and then heavily eroded dome of strata approximately 40 km across and whose concentric rings resemble an impact crater when observed from space.
Here’s how he redrew the map of the world. He conquered land across three continents, ruled over states from Egypt to modern-day India, and never lost a battle – before dying, aged just 32 ...
The Richat Structure in the Sahara Desert of Mauritania. Once considered to be an impact structure, it is now classified as a geologic dome uplifted by an underlying igneous intrusion. Structural dome on Baffin Island, seen in a planation surface. Oblique aerial photo of Upheaval Dome, Utah.