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illuviation |
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illuviationAccumulation of dissolved or suspended soil materials in one area or layer as a result of leaching (percolation) from another. Usually clay, iron, or humus wash out and form a line with a different consistency and color. These lines are important for studying the composition and ages of rock strata. illuviation [i‚lü·vē′ā·shən] (geology) The deposition of colloids, soluble salts, and small mineral particles in an underlying layer of soil. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | The SOC flow in the composition of organic matter begins with litter falling on or into the soil, continues with its disintegration, transformation into humus and accumulation, and ultimate disappearance, via consumption by soil organisms, complete mineralization or illuviation into the subsoil, or eluviation out of the soil cover. Clay illuviation This process consists in the translocation of claysize particles from eluvial (A, E) to illuvial horizons (mainly Bt, and to a lesser degree, in BA or BC horizons). 0) B brown weathering Be = "earthy" (coagulated fabric), Bl = "loamy" (dispersed fabric) E eluviation of colloids Eg = by gleying, El = by lessivation, Ep = by podzolization I illuviation of colloids Ia = argillic, Ih = humic, If = ferric G ground-water influence Go = oxidative, Gr = reductive P pseudogleying M mother substrate (unweathered), Mw = weakly weathered Two prefixes are used here: p means ploughed, r indicates relict horizons. |
illuviation |
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