it says my dads name on it
Sand dunes in every desert are in almost constant movement. They are simply hills of sand and the wind changes them easily and often.
There are large sand dunes located all over the world. Some of the largest dunes are located in France, China, Colorado, Namibia, Algeria, and Australia.
Huge piles of sand are called sand dunes. Sand dunes typically form in deserts or coastal areas where there are strong winds that shape and move the sand into these large structures.
Sossusvlei, Namibia is the African country home to the world's largest sand dunes.
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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.
There are several dunes in Namibia that exceed 300 meters (980 feet) in height. The height varies depending upon the wind. Two well-known dunes are 'Big Daddy" and Dune 7.
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.
No way to tell, sand dunes move every time a wind springs up.
The wind causes movement