Spacer
Spacer
  NASA Logo
Jet Propulsion Laboratory
California Institute of Technology

Vertical spacer bar
+ View the NASA Portal
Spacer
JPL Home Spacer Earth Spacer Solar System Spacer Stars and Galaxies Spacer Technology
Spacer
Aster
Spacer
Gray Bar
Spacer

Spacer
ArrowHOME
Spacer
ArrowMISSION
Spacer
Arrow GALLERY
DividerDividerDivider
Archaeology Archaeology
Divider
Cities Cities
Divider
Geology Geology
Divider
Glaciers Glaciers
Divider
Hydrology Hydrology
Divider
Land Use Land Use
Divider
Natural Hazards Natural Hazards
Divider
Volcanoes Volcanoes
Divider
 red arrowMost Popular Images
Spacer
ArrowDATA
Spacer
ArrowABOUT US
Spacer
Arrow PRESENTATIONS &
   DOCUMENTS
Spacer
ArrowLINKS
Spacer
Arrow LATEST NEWS
Spacer












ASTER


Spacer

Richat Structure, Oudane, Mauritania
Click Image to Enlarge
Richat Structure, Oudane, Mauritania
 (JPG) (1.48 MB) ( 3,130 x 2,953 )
This prominent circular feature in the Sahara desert of Mauritania has attracted attention since the earliest space missions because it forms a conspicuous bull's-eye in the otherwise rather featureless expanse of the desert. Described by some as looking like an outsized ammonite in the desert, the structure [which has a diameter of almost 50 kilometers (30 miles)] has become a landmark for shuttle crews. Initially interpreted as a meteorite impact structure because of its high degree of circularity, it is now thought to be merely a symmetrical uplift (circular anticline) that has been laid bare by erosion. Paleozoic quartzites form the resistant beds outlining the structure. The image was acquired October 7, 2000, covers an area of 45 x 47 km, and is located at 20.9 degrees north latitude and 11.6 degrees west longitude.

Please give credit for these images to:
NASA/GSFC/METI/Japan Space Systems,
and U.S./Japan ASTER Science Team

Spacer
FIRST GOV
CL 97-1376
2608 hits since 09/15/06.
Added: 6/27/2002 12:39:01 PM
NASA Home Page Questions? Comments? Contact:
Nina Cole
Spacer
Spacer