1348-4580 - Desert Erg Iguidi, Algeria, True Colour Satellite Image. True colour satellite image of Erg Iguidi, a sand desert between Algeria and Mauritania. The 250m wide dunes lay in the South on a sand plain, and in the North on a blakek sandstone area. The light blue areas are calcareous and salt crusts left out from the evaporation of the oueds' water. Image taken on 29 March 1987 using LANDSAT data.
1348-4564 - Sahara Desert, Africa, True Colour Satellite Image. Sahara desert, true colour satellite image. The Sahara is the world's largest hot desert, made of sand and volcanic mountains. Composite image using data from LANDSAT 5 & 7 satellites.
1348-4561 - Richat Structure, Mauritania, True Colour Satellite Image. Richat Structure, Mauritania, true colour satellite image. The Richat structure is a geological formation in the Maur Adrar Desert in the African country of 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. Image taken on 13 January 2003 using LANDSAT data.