Quicksand is a colloid consisting of fine granular material such as sandsilt or clay and water. Quicksand forms in saturated loose sand when the sand is suddenly agitated. When water in the sand cannot escape, it creates a liquefied soil that loses strength and cannot support weight.
Quicksand can form in standing water or in upward flowing water as from an artesian spring. In the case of Quicksand - Quicksand flowing water, forces oppose the force of gravity and suspend the soil particles.
The saturated sediment may appear quite solid until a sudden change in pressure or shock initiates liquefaction. This Powerful Love(Instr. Mix) - Marc V.
- Powerful Love the sand to form a suspension and lose strength. The cushioning of water gives quicksand, and other liquefied sediments, a spongy, fluid-like texture. Liquefaction is a special case Mylène Farmer - Interstellaires Quicksand - Quicksand. In this Tears From A Stone - a-ha А Также: Morten Harket / Savoy - Домашняя Коллекция, sudden earthquake forces immediately increase the pore pressure of shallow groundwater.
The saturated liquefied soil loses strength, causing buildings or other objects on that surface to sink. After an initial disturbance—such as a person attempting to walk on it—the water and sand in the quicksand separate and dense Quicksand - Quicksand of sand sediment form; it is because of the formation of these high volume fraction regions that the viscosity of the quicksand seems to decrease suddenly. Someone stepping on it will start to sink. To move within the quicksand, a person or object must apply sufficient pressure on the compacted sand to re-introduce enough water to liquefy it.
The forces required to do this are quite large: to remove a foot from quicksand at a speed of 0. A human is unlikely to sink entirely into quicksand due to the higher density of the fluid assuming the quicksand is on dry ground and not under water, but even if underwater, sinking is still improbable. Quicksand has a density of about 2 grams per milliliter, whereas the density of the human body is only about 1 gram per milliliter. At that level of density, sinking beyond about waist height in quicksand is impossible.
Even objects with a higher density than quicksand will float on it if stationary. Aluminum, for example, has a density of about 2. Continued or panicked movement, however, may cause a person to sink Quicksand - Quicksand in the quicksand.
Since this increasingly impairs Quicksand - Quicksand , it can lead to a situation where other factors such as weather exposure, dehydrationhypothermiatides or predators may harm a trapped person.
Quicksand may be escaped by slow movement of the legs in order to increase viscosity of the fluid, and rotation of the body so as to float in the supine position lying horizontally with the face and torso facing up. Quicksand is a trope of adventure fictionparticularly in film, where it is typically and unrealistically depicted with a suction effect that causes people or animals that walk into it to sink and risk drowning. From Wikipedia, the free encyclopedia.
This article is about the geological feature. For other uses, see Quicksand disambiguation. This article needs attention from an expert in Geology. The specific problem is: there is too much unsourced information. WikiProject Geology may be able to help recruit an expert. July Eiser, G. Wegdam, and Daniel Bonn. National Geographic News. Retrieved October 9, Season 2. Retrieved 23 August Categories : Sand Sediments Geological hazards Soil mechanics.
Wikimedia Commons has media related to Quicksand. Wikiquote has quotations related to: Quicksand.
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