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barchanA crescent-shaped sand dune with horns pointing downwind.
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barchan(Also spelled barchane, barkhan.) A crescent-shaped dune or drift of windblown sand or snow; the arms of the crescent point downward. Conditions under which barchans form are a moderate supply of mate [..]
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barchana crescent-shaped dune whose tips point to leeward. Different from a Seif. Barrier Beach: a long strip formed by sand deposited across the mouth of a harbor or inlet. They are often duned, and many separate an area of marshland from the sea. Barrier Island: a narrow sand island that parallels a shoreline. Basal Area: a forest's tree density ex [..]
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barchancrescent-shaped sand dune which form in desert areas experiencing generally constant winds. The 'horns' of the crescent point downwind, having moved ahead more rapidly, where they become she [..]
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barchanA crescent-shaped sand dune moving across a clean surface with its convex face upwind and its concave slip face downwind.
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