Landslides can be divided into different types depending largely on the manner (and speed) in which material moves down a slope (slide, fall, slip, topple, flow, creep or avalanche). Such classifications are useful, although some landslides represent different combinations. Rock falls, topples and debris avalanches are more common in mountainous harder rock country. Earth flows and creeps are more common in hill country, especially in soft sedimentary rock.
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United States Geological Survey (USGS)
by Margo Johnson
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