Richat Structure, Oudane, Mauritania

2000

NASA: Earth

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.

Select Size

10x10
10" x 10"
(25cm x 25cm)
$39.00
$120.00 in black frame
$200.00 as pleximount
Edition of 50
50 remaining
15x15
15" x 15"
(38cm x 38cm)
$79.00
$228.00 in black frame
$266.00 as pleximount
Edition of 30
30 remaining
24x24
24" x 24"
(60cm x 60cm)
$129.00
$344.00 in black frame
$329.00 as pleximount
Edition of 10
10 remaining

More Work From NASA: Earth

Lake Natron, Tanzania
From $69

Lake Natron, Tanzania is located in AfricaÔÇÖs Great Rift Valley. The alka…

Kerch, Ukraine
From $29

Kerch is one of the most ancient cities of Ukraine, and is strategically l…

John F. Kennedy Space Center
From $39

The John F. Kennedy Space Center, AmericaÔÇÖs spaceport, is located along …

Mackenzie River Delta, Canada
From $39

The Mackenzie River in the Northwest Territories, Canada, with its headstr…

Malosmadulu Atolls, Maldives
From $69

North and South Malosmadulu Atolls are in the Maldives, an island republic…

Yangtze River and Three Gorges Dam
From $39

This ASTER image, acquired on July 17, 2000 shows a 60 km stretch of the Y…

Ugab River, Namibia
From $29

Elusive, but ecologically vital, NamibiaÔÇÖs Ugab River only flows above g…

Arkhangelsk, Russia
From $39

Arkhangelsk (or Archangel in English) is a city and the administrative cap…

Tokyo
From $49

These images of the city of Tokyo were acquired on March 22, 2000; the lef…

Palm Islands, Dubai
From $49

Artificial islands shaped like a palm tree are now being built as resorts.…

The Dead Sea
From $29

The Dead Sea is the lowest point on Earth at 418 meters below sea level, a…

Finney Kansas
From $39

Finney County in southwestern Kansas is now irrigated cropland where once …

Alluvial Fan, China
From $39

A vast alluvial fan blossoms across the desolate landscape between the Kun…

Hugli River Delta, India
From $39

The western-most part of the Ganges Delta is seen in this 54.5 by 60 km AS…

Manaus, Brazil
From $49

The junctions of the Amazon and the Rio Negro Rivers at Manaus, Brazil. Th…

Mt. St. Helens
From $49

This ASTER image of Mt. St. Helens volcano in Washington was acquired on A…

Nebraska Sand Hills
From $49

About a quarter of Nebraska is covered by the Sand Hills. These are Pleist…

Florida Keys
From $39

The Florida Keys are a chain of islands, islets and reefs extending from V…

White Nile
From $39

The Nile River in Africa is often regarded as the longest river on Earth, …