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Richat Structure, Sahara, Landsat / SRTM Image

This prominent circular feature, known as the Richat Structure, in the Sahara desert of Mauritania is often noted by astronauts because it forms a conspicuous 30-mile-wide bull's-eye on the otherwise rather featureless expanse of the desert. Initially mistaken for a possible impact crater, it is now known to be an eroded circular anticline (structural dome) of layered sedimentary rocks. This view was generated from a Landsat satellite image draped over an elevation model produced by the Shuttle Radar Topography Mission. The view uses a 6-times vertical exaggeration to greatly enhance topographic expression. Colors of the scene were enhanced by use of a combination of visible and infrared bands, which helps to differentiate bedrock (browns), sand (yellow, some white), minor vegetation in drainage channels (green), and salty sediments (bluish whites). Some shading of the elevation model was included to further highlight the topographic features. Elevation data was acquired by the SRTM aboard the Space Shuttle Endeavour, launched on February 11, 2000.
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Titre:
Richat Structure, Sahara, Landsat / SRTM Image
Légende: Voir la traduction automatique
This prominent circular feature, known as the Richat Structure, in the Sahara desert of Mauritania is often noted by astronauts because it forms a conspicuous 30-mile-wide bull's-eye on the otherwise rather featureless expanse of the desert. Initially mistaken for a possible impact crater, it is now known to be an eroded circular anticline (structural dome) of layered sedimentary rocks. This view was generated from a Landsat satellite image draped over an elevation model produced by the Shuttle Radar Topography Mission. The view uses a 6-times vertical exaggeration to greatly enhance topographic expression. Colors of the scene were enhanced by use of a combination of visible and infrared bands, which helps to differentiate bedrock (browns), sand (yellow, some white), minor vegetation in drainage channels (green), and salty sediments (bluish whites). Some shading of the elevation model was included to further highlight the topographic features. Elevation data was acquired by the SRTM aboard the Space Shuttle Endeavour, launched on February 11, 2000.
Crédit:
Album / Science Source / NASA/JPL/NIMA
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Modèle: Non - Propriété: Non
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Taille de l'image:
2259 x 1244 px | 8.0 MB
Taille d'impression:
19.1 x 10.5 cm | 7.5 x 4.1 in (300 dpi)
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