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barchan
barchan (bɑːˈkɑːn) , barkhan , barchane or barkann (Physical Geography) a crescent-shaped shifting sand dune, convex on the windward side and steeper and concave on the leewardbarchan
barchan[bär′kän] (geology) A crescent-shaped dune or drift of windblown sand or snow, the arms of which point downwind; formed by winds of almost constant direction and of moderate speeds. Also known as barchane; barkhan; crescentic dune. MedicalSeeBarkan |