As nouns the difference between illuvium and alluvium
is that illuvium is material displaced across a soil profile, from one layer to another, by the action of rainwater while alluvium is soil, clay, silt or gravel deposited by flowing water, as it slows, in a river bed, delta, estuary or flood plain.
illuvium
English
Noun
(
en-noun)
(
wikipedia illuvium)
(geology) material displaced across a soil profile, from one layer to another, by the action of rainwater
alluvium
English
Noun
(
wikipedia alluvium)
(
en-noun)
soil, clay, silt or gravel deposited by flowing water, as it slows, in a river bed, delta, estuary or flood plain