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Nine piles of sand.
No, sand dunes are formed when wind moves sand into massive piles.
Large piles of sand are called dunes.
The massive wind blown piles of sand are called sand dunes. This is when sands blow into a pile.
Sand dunes
The massive wind blown piles of sand are called sand dunes. This is when sands blow into a pile.
Piles of pebbles in sand.
If you mean the use of large piles sunk into mud or sand, then the two most famous cities that come to mind are Amsterdam, built on wooden piles, and more recently Shanghai built on deep concrete piles.
they are formed when wind lifts up dry sediments and accumulate over time Sand dunes are big piles of sand washed up from the beach