Landslides: the downward movement of rock, soil, mud,, rock crumbles into small pieces, Rock Falls: when sediment of any size falls from a cliff, common on roads cut into cliffs, Mudflows: occur when waterwater mixes with rock debris and soil soil , becomes consistency of cement or mud, Slump: the downward movement of intact masses of rock and soil, rock does not crumble, remains as one mass, Creep: the slow movement of soil and rock down a slope, can be a very gradual process ,

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