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How did these sand dunes form?


At one time, a river ran through this area. When it dried, the sandy bottom formed the dunes.


Gravity caused the grains of sand to fall from a mountain, forming the dunes.


Wind carried the sandy soil from far away and deposited it where it formed huge hills of sand.


A glacier traveled over the land creating the different hills of sand.

White Sands National Monument

How Did These Sand Dunes Form At One Time A River Ran Through This Area When It Dried The Sandy Bottom Formed The Dunes Gravity Caused The Grains Of Sand To Fal class=