[Skip to content]
Browse image
Resolutions offered for this image:
1536 x 1536 pixels 639 x 639 pixels 5700 x 6000 pixels 500 x 526 pixels 640 x 480 pixels
Cloud masks available for this image:

latitude/longitude of image
Spacecraft nadir point:

Photo center point: 20.5° N, 13.0° W

Nadir to Photo Center:

Spacecraft Altitude: nautical miles (0km)
Click for Google map
features and other details
information about camera used
additional formats
Width Height Annotated Cropped Purpose Links
1536 pixels 1536 pixels No No Earth From Space collection Download Image
639 pixels 639 pixels No No Earth From Space collection Download Image
5700 pixels 6000 pixels No No Download Image
500 pixels 526 pixels No No Download Image
640 pixels 480 pixels No No Download Image
Other options available:
Download Packaged File
Download a Google Earth KML for this Image
View photo footprint information
Image Caption: STS037-084-021 Amojjar Pass, Mauritania April 1991
Millions of years ago most of this very arid region in northwest Mauritania was made up of large sandstone plateaus that looked like the brownish sandstone tabletop terrain that exists in the area today. This entire region has undergone a dramatic climatic change. It is apparent when looking at the existing landscape that substantial rainfall altered the former landscape into one of broad canyons bounded by craggy, vertical cliffs. The area now averages approximately 4 inches (10 centimeters) of rainfall annually, sometimes decreasing to as little as 1 inch (25 centimeters). The base of these cliffs is hidden by numerous talus slopes visible even at this small scale. The Amojjar Pass, near the town of Atar, is in the canyon just east of the large flat-topped plateau (center of the photograph). The pass is an important ground transportation link because it provides a somewhat protected roadway connecting the two Mauritania cities of Fdérik and Nouakchott, the capital. The effects of wind erosion on the landscape are evidenced by the northeast-southwest orientation of the sand streaks.