Illuvium

Illuvium is material displaced across a soil profile, from one layer to another one, by the action of rainwater. The removal of material from a soil layer is called eluviation. The transport of the material may be either mechanical or chemical. The process of deposition of illuvium is termed illuviation. It is a water-assisted transport in a basic...
Found on http://en.wikipedia.org/wiki/Illuvium

illuvium

material dissolved in water and deposited in layers
Found on http://phrontistery.info/i.html
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