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How does quick sand form?

Updated: 9/14/2023
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14y ago

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Quicksand is a form of fine sand that loses its supporting capacity and acquires the character of a liquid. It's usually found in hollows at the mouths of large rivers or along flat stretches of streams or beaches where pools of water become partially filled with sand and an underlying layer of stiff clay or other dense material prevents drainage.

The sand body behaves like a fluid because water flowing through the sand forces individual grains apart and prevents them from settling. The sand then loses its firmness and cannot support a heavy weight. Some natural sands are in a condition so loose that such minor disturbances as those caused by a footstep may cause the structure to collapse.

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14y ago
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Q: How does quick sand form?
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