The saturated sediment may appear quite solid until a sudden change in pressure or shock initiates liquefaction.
In the case of upward flowing water, forces oppose the force of gravity and suspend the soil particles. Quicksand can form in standing water or in upward flowing water (as from an artesian spring). When water in the sand cannot escape, it creates a liquefied soil that loses strength and cannot support weight. It forms in saturated loose sand when the sand is suddenly agitated. Quicksand, also known as sinking sand, is a colloid consisting of fine granular material (such as sand, silt or clay) and water. Quicksand and a warning sign about it at a gravel quarry in England Quicksand on the Thames JSTOR ( April 2022) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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