The wind causes movement
wind
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glaciers
Sand dunes move down wind. A simple example: if the prevailing wind is from the west, the dunes will mainly move towards the east.
wind and storms cause the dunes to move by moving around the individual sand grains when the dunes get too large the 15 mph winds will cause them to collapse and thus it has moved.
Large piles of sand are called dunes.
No way to tell, sand dunes move every time a wind springs up.
Sand dunes in every desert are in almost constant movement. They are simply hills of sand and the wind changes them easily and often.
Scientificly, sand dunes were formed by chemical weathering.
Wind moving sand causes dunes, both in the desert and at the beach.
Dunes are hills or small mountains made of sand and normally form in the desert. They can move because the wind may blow the sand from one point to another.
glaciers and sand dunes