Question

Wht are sand Barchans and how are they formed?
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Answer 1

Answer:

A barchan or barkhan dune is a crescent-shaped dune . The term was introduced in 1881 by Russian naturalist Alexander von Middendorf, for crescent- shaped sand dunes in Turkestan and other inland desert regions ...

Answer 2

Answer:

Barchans face the wind, appearing convex and are produced by wind action predominantly from one direction. They are a very common landform in sandy deserts all over the world and are arc-shaped, markedly asymmetrical in cross section, with a gentle slope facing toward the wind sand ridge, comprising well-sorted sand.

Explanation:

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