Grand Erg Occidental : Geography, Features Wikipedia, the free encyclopedia

Grand Erg Occidental

Erg in Algeria

Grand Erg Occidental العرق الغربي الكبير
Erg
The desolate landscape of the Grand Erg Occidental near Timimoun
Map of the Maghreb showing the Grand Erg Occidental.
Country	Algeria
Elevation	500 m (1,600 ft)

The Grand Erg Occidental (Arabic: العرق الغربي الكبير, al-ʿIrq al-Gharbī al-Kabīr), (also known as the Western Sand Sea) is the second largest erg in northern Algeria after the Grand Erg Oriental. It covers an area of approximately 78,000 square kilometres (30,000 sq mi).^[1] The sand dunes in the erg are formed by the wind, and can be up to 120 metres (390 ft) high.^[1] Certain crescent-shaped dunes, known as barchans, are actually mobile; the wind can push these dunes as much as 20 to 30 m (65–100 ft) in one year.^[1]

Geography

It is a desert natural region that receives less than 50 mm (1,96 in) of rainfall per year.^[2] The mean elevation of the Grand Erg Occidental is about 500 m, on average higher than the elevation of the Grand Erg Oriental, but not as high as the neighboring Tademaït to the southwest. This desolate region is a practically uninhabited area; there are no permanent villages and there are no roads crossing it.^[3]

Features

Grand Erg Occidental (centre), as seen from space
Ksar of Aghlad; a Ksar -which means castle- was a structure where a tribe used to live

References

Wikimedia Commons has media related to Grand Erg Occidental.

^ ^a ^b ^c Scheffel, Richard L.; Wernet, Susan J., eds. (1980). Natural Wonders of the World. United States of America: Reader's Digest Association, Inc. pp. 168–169. ISBN 0-89577-087-3.
^ "STS059-238-088 Grand Erg Occidental, North Central Algeria April 1994". Earth from Space. NASA. Archived from the original on 2006-10-08. Retrieved 2007-01-18.
^ "GRAND ERG OCCIDENTAL: The endless dunes". Adventures in Algeria. LexicOrient. Archived from the original on 2012-11-19. Retrieved 2007-01-18.