Where is colluvium predominantly found?

Colluvium is predominantly found on steep slopes due to the processes that lead to its formation. This type of sediment is created by the accumulation of materials that have been transported downhill through gravitational forces, such as rock debris, soil, and other sediments that have weathered from upper slopes. Steep topography facilitates the movement of these materials, which can occur during events like heavy rainfall or mechanical weathering.

On steep slopes, the gravitational pull is stronger, promoting the movement of particles that might be loosened from the cliff faces or high land. As these materials tumble down, they collect in lower areas, creating a layer of colluvium. This contrasts with the features found in river valleys or flat plains, where distinct depositional processes, such as those associated with flowing water, dominate. These areas are characterized by alluvial soils rather than colluvial deposits. At high altitudes, although there may be steep slopes, the specific characteristics and processes defining colluvium are most apparent in regions where slopes are not only steep but also directly contribute to sediment movement downwards.