how sand dunes is formed
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sand dunes are from due to movement of winds
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A sand dune will be formed with the following three things:
A massive amount of loose sand in an area with little vegetation, usually on the coast or in a dried-up river, lake or sea bed.
Wind or Breeze is needed to move the grains of the sand.
An obstacle that causes the sand to lose the momentum and settle. The obstacle could be as small as a rock or as big as a tree.
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