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Sand or fine particles, when blown by the wind, will form ridges, called sand dunes.

The wind on their upwind face is subject to a slightly higher wind velocity - caused by the dune's obstruction itself. This upwind slope will have a rounded shape. Beyond the crest, the sand will drop out thus creating a hollow curved shape.

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11y ago

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Wiki User

16y ago

Sand dunes are important because they aid in the prevention of erosion of beaches. They also provide a necessary habitat for many species.

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Wiki User

10y ago

No purpose - it is a random heap of windblown sand

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Wiki User

15y ago

it is eroded rocks

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Q: Why are sand dunes important?
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