Mauritania and Western Sahara

Credit: MODIS team; NASA, Posted on: Wednesday, 22 December 2004, 07:46 CST Download full size image

What appears to be dramatic plumes of pale orange dust streaming across Mauritania and southern Morocco's Western Sahara is actually a permanent feature caused by wind erosion. This part of Mauritania is dominated by low-lying rocky desert, with a large sandstone plateau rising in the east. At the lower right corner of the image is a circular feature called the Richat Structure. It's almost perfectly-round shape resembles an impact crater (such as by a meteorite), but in all likelihood is merely a symmetrical uplift (circular anticline) that has been laid bare by erosion. This is a true-color Terra MODIS image from December 10, 2004 produced as a subset image by the MODIS Rapid Response System.

More Images

Mars
Eroded Sediments in West Candor Chasma.This image shows a steep-sided depression in light-toned, layered rocks in the Valles Marineris cany...

---

Universe
Disc Around Young Star.Artist's impression of the environment of a young star, showing the geometry of the dust disc in the...

---