Yet some sources consider the eluvial zone to be the A horizon plus the (distinct) E horizon, as eluviation technically occurs in both. In a typical soil profile, the eluvial horizon refers to a light-colored zone located (depending on context and literature) either at the lower part of the A horizon (symbol: Ae) or within a distinct horizon (E horizon) below the A, where the process is most intense and rapid. Eluviation occurs when precipitation exceeds evaporation.Ī soil horizon formed due to eluviation is an eluvial zone or eluvial horizon. In geology, the removed material is irrelevant, and the deposit (eluvial deposit) is the remaining material. In soil science, eluviation is the transport of soil material from upper layers of soil to lower levels by downward percolation of water across soil horizons, and accumulation of this material ( illuvial deposit) in lower levels is called illuviation. There is a difference in the usage of this term in geology and soil science. The process of removal of materials from geological or soil horizons is called eluviation or leaching. In geology, eluvium or eluvial deposits are those geological deposits and soils that are derived by in situ weathering or weathering plus gravitational movement or accumulation. For the musician, see Eluvium (musician).
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