Which of the following statements regarding Barchan is/are correct?
1. It is a crescent shaped mound of sand, which is deposited by the wind blowing constantly from one direction in a desert.
2. The windward side has a convex steep slope with maximum height at the centre.
3. Two ends of Barchan are called horns and point opposite to the direction the wind blows.
Select the answer using the code given below:
A.1 only✓ Correct
B.1 and 2 only
C.2 and 3 only
D.1, 2 and 3
Explanation
Barchan dunes are crescent-shaped sand mounds formed by unidirectional winds in deserts, so Statement 1 is correct. The windward side of a Barchan is a gentle, convex slope, not steep, and the maximum height is at the crest where the slip face begins, not at the centre — so Statement 2 is incorrect. The two horns of a Barchan point in the same direction as the wind flow (downwind), not opposite to it, so Statement 3 is incorrect. Only Statement 1 is correct.
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