sand dunes are cuased by erosion cuased by what?

Answer 1

wind

Answer 2

One easy geological definition of a 'sand dune' is simply a hill of sand built by eolian (wind) processes. So sand dunes _are_ caused by wind.

However, while wind plays the major role in sand accumulation, the actual erosion of rocks into sand-size grains is primarily due to the action of water and ice.

Dunes can likely be found in any environment where there is a substantial atmosphere, winds, and dust to be blown around. Dunes are common on Mars, and have also been observed in the equatorial regions of Titan (one of Jupiter's moons).

Answer 3

What I noticed at the nation Dunes in Oregon, is the wind is always moving the sand. I think the wind keeps the sand moving and no plants growing on the dunes.

Answer 4

Wind & human overuse of fertile land