Geography • Physical GeographyMedium
Which of the following describes a barchan dune?
A. A linear ridge of sand parallel to the prevailing wind direction
B. A crescent-shaped sand dune with horns pointing downwind✓ Correct Answer
C. A star-shaped dune formed by multidirectional winds
D. A circular depression formed by deflation in an oasis
💡 Solution & Explanation
A barchan dune is characterized as a solitary crescent-shaped sand formation with its horns pointing downwind in the direction of the prevailing unidirectional wind flow. Linear dunes form parallel lines under shifting wind regimes, whereas star dunes develop under multidirectional wind patterns.
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