Algeria, The Sahara
The Algerian Sahara may be divided roughly into two depressions of different elevation, separated from one another by a central north-south rise called the M'zab (Mzab). Each zone is covered by a vast sheet of sand dunes called an erg. The Great Eastern Erg (Grand Erg Oriental) and the Great Western Erg (Grand Erg Occidental), which average 1,300 to 2,000 feet (400 to 600 metres) in height, decline
posted by SuddenCat @ 11:41 AM
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