colluvium
/kəˈluːviəm/
noun
- Loose soil, rock, and other material that has moved down a slope and gathered at the bottom, usually due to gravity.
- Geologists studied the colluvium to learn about past landslides in the area.
- The hikers had to carefully cross the colluvium at the base of the cliff.
- Farmers often find rich colluvium in the valleys between hills.