3 - Mass Wasting Slopes guide the flow of water downhill to...

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Mass Wasting Slopes guide the flow of water downhill to form streams or channels. Most natural surfaces slope and sediments consists of rock or mineral particles that are transported and deposited by fluids. This sediment called alluvium lies at the valley bottom. . Bedrock : solid rock layer under soil and regolith, which is relatively unchanged by weathering Soil Creep : occurs by drying, wetting, heating and cooling Extremely slow downhill movement of soil and regolith can cause vertical rock layers to bend. Earthflow : moderately rapid downhill flow of water-saturated soil. Usually occur in humid climates. Affects a few acres. Can block highways, railroads, etc. Mudflow and Debris Flood Rain falling much faster than can be absorbed by the soil and without enough vegetation induce mud and debris flows. Mudflow : flowing mixture of water and soil or regolith that flows rapidly downhill Lahar : volcanic mudflow Debris flood or debris flow : very watery mudflow Alpine debris avalanche
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