Monday, January 03, 2005

Arabia, Ad-Dahna'

The Ad-Dahna' belt, separating Najd from eastern Arabia, is a sand stream moving slowly over 800 miles from An-Nafud to the Rub' al-Khali. Usually it is no more than 50 miles wide. The sands, frequently reddish in colour, vary greatly in form; particularly in the central stretches, long parallel ridges rise to heights of approximately 150 feet, while some dunes are three times that height.

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