PHYSIOGRAPHIC DIVISION OF INDIA
PHYSICAL FEATURES OF INDIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sand ridges
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Crescent-shaped sand dunes
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Sand dunes
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Longitudinal dunes
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Detailed explanation-1: -barchan, also spelled Barkhan, crescent-shaped sand dune produced by the action of wind predominately from one direction. One of the commonest types of dunes, it occurs in sandy deserts all over the world.
Detailed explanation-2: -Barchans are crescent-shaped sand dunes. The part which faces the wind (the windward side) has a gentle slope, while the other part (leeward side) has a steep slope.
Detailed explanation-3: -Barchans are crescent-shaped sand dunes forming in arid regions with unidirectional wind and limited sand supply.
Detailed explanation-4: -Barchan dunes are crescentic dunes with a slipface and two horns that point downwind (see Chapter 11.11). They are associated with areas where there is a single dominant wind-direction and limited sand supply. Barchans are the simplest type of sand dune and they were one of the first forms to be investigated.
Detailed explanation-5: -The region near the Indo-Pak border is famous for the crescent-shaped dunes or Barchans in India. These crescent sand dunes are visible in the Thar Desert of India.