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Erosion and Deposition by Wind,Ice,and Gravity

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Abrasion
the wearing down of rock particles by friction due to water or wind or ice
Deflation
(geology) the erosion of soil as a consequence of sand and dust and loose rocks being removed by the wind
Dunes
hills of sand pushed up by winds
Loess
a fine-grained unstratified accumulation of clay and silt deposited by the wind
Glacier
a slowly moving mass of ice
Glacial Drift
the rock material carried and deposited by glaciers
Alpine Glacier
a glacier that moves down from a high valley
Cirques
bowl-shaped basins eroded by valley glaciers
Arete
a sharp narrow ridge found in rugged mountains
Continental Glaciers
smoothe the landscapes by removin the features that existed before the ice appeared
Erratics
isolated boulders left behind by a glacier
Ice Age
any period of time during which glaciers covered a large part of the earth's surface
Mass Movement
the downhill movement of rock and soil because of gravity
Creep
a slow creeping mode of locomotion (on hands and knees or dragging the body)
Rockfall
Type of mass movement that involves the detachment and movement of a small block of rock from a cliff face to its base. Normally occurs when the rock has well defined bedding planes that are exaggerated by freeze-thaw action or thermal expansion and contraction.
Landslide
a slide of a large mass of dirt and rock down a mountain or cliff
Mudflow
quickly moving downhill flow of soil and rock fragments containing a large amount of water