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Angle of Repose

the steepest angle at which loose material remains stationary without sliding downslopes


a type of movement common to mass-wasting processes that refers to the free falling of detached individual pieces of any size


a type of movement common to mass-wasting processes in which water saturated material moves downslope as a viscous fluid


a layer in a soil profile

Internal Processess

derive energy from the Earth's interior


permanently frozen layer of soil beneath the surface of the ground

Secondary Enrichment

thje concentration of minor amounts of metals that are scattered through unweathered rock into economically valuable concentrations by weathering processes


a movement common to mass wating processes in which the material moving downslope remains fairly coherent and moves along a well defined surface

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