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Mollisol
(redirected from Mollisols)

   Also found in: Wikipedia 0.01 sec.
Mollisol [′mal·ə‚säl]
(geology)
An order of soils having dark or very dark, friable, thick A horizons high in humus and bases such as calcium and magnesium; most have lighter-colored or browner B horizons that are less friable and about as thick as the A horizons; all but a few have paler C horizons, many of which are calcareous.


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According to the US Soil Taxonomy (Soil Survey Staff, 2003) they correspond to Mollisols and Entisols (Endoaquolls, Hapludolls, Endoaquents) (Godagnone et al.
In Wisconsin and northern Illinois, 8 of 12 soil orders are represented: mollisols (present under prairie), alfisols (deciduous forests), spodosols (coniferous forests), entisols and inceptisols (both of which are associated with poorly developed soils), histosols (peat and muck), and vertisols and paleosols (which represented <1% of the area).
[FIGURE 4 OMITTED] The first class was defined using the following soil suborders as indicators of wetland presence, since they are related to hydromorphic processes: Alfisols of Suborders Aqualfs, Entisols Aquents and Fluvents, Inceptisols Aquepts, Mollisols Aquic and Aquolls and Histosols Saprists and polygons corresponding to Mollisols of Suborders Udolls and Ustolls corresponding to subgroup Aquic (Table 2).
 
 
 
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