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Topographic map of Guelb el Richat. Elevation in meters. 10 m contour interval with major contour line every 50 m. Spectacular hydrothermal features are a part of the Richat Structure. They include the extensive hydrothermal alteration of rhyolites and gabbros and a central megabreccia created by hydrothermal dissolution and collapse. The ...
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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 ...
Richat Structure by Shuttle Radar Topography Mission (SRTM). Instead of being a meteorite impact, the landform is more likely to be a collapsed dome fold structure.. Remote sensing is used in the geological sciences as a data acquisition method complementary to field observation, because it allows mapping of geological characteristics of regions without physical contact with the areas being ...
The Richat Structure in Mauritania is not an impact crater, but rather a eroded anticline. It is 50km across, and shown in here in a topographic reconstruction (scaled 6:1 on the vertical axis) from sattelite photos. False coloring as follows: bedrock=brown, sand=yellow/white, vegetation=green, salty sediments=blue
Guelb er Richât: 28 November 2020 50 ouguiya Violet Ibn Abbas mosque, Nouakchott Teapot; musical instruments 28 November 2017 100 ouguiya Green Tower Cattle 28 November 2017 200 ouguiya Yellow Tower Camels 28 November 2017 500 ouguiya Blue Tower Trawler; fish 28 November 2017 1,000 ouguiya Brown Tower Locomotive of an ore train 28 November 2017
The Adrar is an arid plateau, known for its gorges, regs (stony deserts) and sand dunes.Structurally the Adrar is a low central massif which rises to over 700 m (2,297 ft) above sea level just east of Atar near the Amojjar Pass on the track to Chinguetti, then loses elevation and becomes subsumed by dunes to the south and east.
The original surface overlying the Richat Structure has been destroyed by erosion over many millions of years. Any crater, volcanic or otherwise, was destroyed by erosion long ago. I would not be surprise if the rocks exposed at the surface now were a kilometer more or so below the surface at the time the Richat Structure was formed.