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.
As fast as the wind carries grains of sand
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wind
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.
The wind causes movement
There are only two sand dunes in Michigan. The two sand dunes are Sleeping Bear Dunes and Sliver lake sand dunes.
They form at the whim of the wind.
sand dunes change
the largest sand dunes