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13 Cards in this Set
- Front
- Back
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mass wasting
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when loose rock and soil move down slop under influence of gravity
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factors that effect mass wasting
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steepness of slope
vegetation, roots hold soil in place friction between sediment |
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cohesion of sediment
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frictional contact between sediment
lessened w/ rain, roundness, and shaking |
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liquifaction
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when sediment becomes quicksand because of shaking uderneath it that eliminates friction, allows to flow
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mass wasting is classified by:
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speed, material, and type of movement
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angle of repose
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natural angle that sediment is stable in
if slope is steeper, then sediment will fall |
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slow mass wasting
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includes creep, slow processes that aren't as dangerous
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creep
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sediment moves downslope particle by particle
at night, ground freezes, expands 9% and lifts sediment up paralel to the slope when it melts, sediment is dropped straight down zigzag movement |
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fast mass wasting
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the most dangerous type, includes falls, slides, and flow
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erosional features
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cliffs, scars, widened river valleys
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scars
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when part of a mountainside is weathered away, exposing the bedrock
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depositional features
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landslide rubble, talus slopes
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talus slope
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accumulation of sediment from mass wasting at the base of a slope
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