Colluvium
（重定向自Hillwash）
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![This talus accumulation is an example of colluvium](/Images/godic/202501/18/Talus_cones1037.jpg")
![The rate of the natural processes of erosion and colluvium accumulation are increased by human induced removal of native vegetation such as on Koh Tao Island in Thailand.](/Images/godic/202501/18/Koh_Tao_Island,_Land_erosion1037.JPG")
Colluvium is a general name for loose, unconsolidated sediments that have been deposited at the base of hillslopes by either rainwash, sheetwash, slow continuous downslope creep, or a variable combination of these processes. Colluvium is typically composed of a heterogeneous range of rock types and sediments ranging from silt to rock fragments of various sizes. This term is also used to specifically refer to sediment deposited at the base of a hillslope by unconcentrated surface runoff or sheet erosion.