
An earthflow (earth flow) is a downslope viscous flow of fine-grained materials that have been saturated with water, and moves under the pull of gravity. They are an intermediate type of mass wasting that is between downhill creep and mudflow. The types of materials that are susceptible to earthflows are clay, fine sand and silt, and fine-grained ...
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http://en.wikipedia.org/wiki/Earthflow

sheet or stream of soil and rock material saturated with water and flowing downslope under the pull of gravity; it represents the intermediate stage ... [1 related articles]
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http://www.britannica.com/eb/a-z/e/2

A detached mass of soil that moves downslope over a curved failure surface under the influence of gr
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http://www.encyclo.co.uk/local/22392

A rapid type of downslope mass movement that involves soil and other loose sediments. Usually triggered by water saturation from rainfall.
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http://www.physicalgeography.net/physgeoglos/e.html

A detachment of soil and broken rock and its subsequent downslope movement at slow or moderate rates in a stream or tongue-like form.
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http://www.scientificpsychic.com/etc/geology-glossary.html

A form of slow, but perceptible, mass movement, with high content of water and rock debris. Lateral boundaries are well-defined and the terminus is lobed. With increasing moisture content grades into a mudflow.
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https://www.encyclo.co.uk/local/22327
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