illuvial
/ɪˈluːviəl/
adjective
- Relating to or formed by materials that have been washed from one soil layer and deposited in another.
- The illuvial horizon in the soil profile contained a high concentration of clay.
- Scientists collected samples from the illuvial layer to test for mineral content.
- The garden's illuvial deposits made the subsoil very dense and difficult to dig.