eluvium
/ɪˈluːviəm/
noun
- A deposit of soil, dust, or rock debris that has been formed by the weathering of rocks in place, without being moved by wind or water.
- The garden's soil was rich in eluvium from the nearby granite outcrop.
- Geologists study eluvium to understand how local bedrock breaks down over time.
- The hiker noticed a layer of eluvium at the base of the cliff, made of broken rock fragments.