+1 vote
How is a Barchan formed?

2 Answers

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Wind blows in one direction for a long time carrying sand. Wind carry sand forward along the edges of the mound leading to the development of horns, leading to formation of a crescent moon-shaped feature known as barchan. Seif Dunes. Are formed from chains of barchans where cross winds interrupt prevailing winds.
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Genesis & evolution of barchan dunes