INDIAN GEOGRAPHY

Detailed explanation-1: -A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate.

Detailed explanation-2: -One type of sand dune is called a barchan. A barchan sand dune is a crescent-shaped dune, with tips that point in the downwind direction, and has a steep slip face. Individual barchan dunes are separate from each other and gradually move along the barren desert surface.

Detailed explanation-3: -A large dune complex is called a dune field, while broad, flat regions covered with wind-swept sand or dunes with little or no vegetation are called ergs or sand seas.

Detailed explanation-4: -What are sand dunes? Sand dunes are created when wind deposits sand on top of each other until a small mound starts to form. Once that first mound forms, sand piles up on the windward side more and more until the edge of the dune collapses under its own weight.

Detailed explanation-5: -Desert winds transport sand over large distances. When the winds stop blowing, the sand is deposited in low hill-like structures called sand dunes.