illuvial


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illuvial

[i′lü·vē·əl]
(geology)
Pertaining to a region or material characterized by the accumulation of soil by the illuviation of another zone or material.
References in periodicals archive ?
Capital letters: A - humus horizon, AH - transitional horizon from humus to peat, B - illuvial, E - elluvial horizon, C - parent material BC, EB - for horizons dominated by properties of one master horizon but having subordinate properties of another.
The soil of the hills west and east of the banks in the Mures Couloir are mainly brown eumesobasic soils and brown illuvial argillaceous soils, which can be found in standard formats on the wide flat peaks and in various stages of erosion on the slopes, where they are frequently combined with regosols and even erodisols, often anthropically modified by means of earthwork and fertilisation.
Separation of the illuvial B horizon in three parts (Bt1, Bt2, and BC) is a difference to the standard description of Haplic Luvisol provided by WRB [26] and the Polish Soil Systematic System [28].
Sod-podzolic soil is the most common soil type in Latvia, but illuvial humus podzol is common only in lowlands (Karklins et al., 2009).
Thus, the total carbon content in topsoil horizons up to a depth of 3-40 cm exceeds its respective concentration by 2.9-3.3 times in the 2nd transelluvial meadow landscape position and by 18.2 times in the illuvial horizon B.
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).
Letter Designation Characteristics a, e, i Refers to highly (sapric), intermediate (hemic), or slightly (fibric) decomposed material b Used with any horizon that has been buried by overlying deposits c Concretions present g Strongly gleyed (referring to the amount of reduced iron present) h Illuvial (from leaching above), accumulation of organic material m 90% cemented p Mixed by plowing r Weathered bedrock that can be dug with a spade t Accumulation of clay x Fragipan present z Accumulation of soluble salts
The recent floodplain soils lack horizonation, illuvial accumulations, and soil structure.
Soil Order Description Use Alfisol Usually deciduous forest soils of temperate Cropland, moist climates, light colored, slightly to forest, moderately acid with illuvial layer high in range silicate clays.
The interval from 66-112 cm is also now part of the BC horizon of the surface soil and an illuvial horizon (B'X) of the fragipan.