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Grand Ergs, Algeria, seen from the space shuttle Discovery. 12/1999
auteur: Nasa/Novapix
référence: t-afalg-00002
Image Size 300 DPI: 34 * 34 cm
Two great sand seas occupy northern Algeria, Grand Erg Oriental (Eastern Sand Sea) and Grand Erg Occidental (Western Sand Sea). Both sand seas occupy depressions that are separated by a north-south rise called Mizab. Ergs are areas of large accumulations of sand that take the form of actively shifting dunes, fossilized dunes, or extensive sand sheets.
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