The hill-like formation formed by
accumulation of sand in a desert
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Discussion of sand dunes on Spiekeroog, East Frisian Islands, Germany. Sand dune, any accumulation of sand grains shaped into a mound or ridge by the wind under the influence of gravity.
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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. Every dune has a windward side and a slipface. ... A collection of dunes is called a dune belt or dune field.28-Jan-2011
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