Question

Explain how the sand dunes caused

Answer 1

Answer:

Heya!

It is caused due to wind!

Hope it helps!

Answer 2

Answer:

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The causes of Dunes are :-

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1.They are caused by the accumulation of sand at an obstacle such as patch or grass or a heap or rocks.

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2.The windward side of barchan is convex and gentle slopping while the leewardside is concave or steep.

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3.The crest of sand dune moves forward as more sand is accumulated by the prevailing wind.

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4.The migration of the barchanas maybe a threat to desert lifefor they may encroach on an oasis burying houses and trees.

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5.Long rooted trees and grasses are planted to halt tge advance of dunes to prevent the areas of fertile land.

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