illuviation
noun
il·lu·vi·a·tion i-ˌlü-vē-ˈā-shən 
: accumulation of dissolved or suspended soil materials in one area or horizon as a result of eluviation from another
illuviated
i-ˈlü-vē-ˌā-təd
adjective 
Word History
Etymology
in- entry 2 + -luviation (as in eluviation)
First Known Use
1928, in the meaning defined above