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Fragipan Soils of Illinois: II. Mineralogy in Reference to Parent Material Uniformity of Hosmer Silt Loam
Author(s) -
Grossman R. B.,
Stephen I.,
Fehrenbacher J. B.,
Beavers A. H.,
Parker J. M.
Publication year - 1959
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1959.03615995002300010026x
Subject(s) - loam , silt , weathering , geology , mineralogy , soil water , clay minerals , horizon , montmorillonite , kaolinite , soil science , geochemistry , chemistry , geomorphology , mathematics , geometry , organic chemistry
The mineralogy of Hosmer silt loam, a bisequal soil with a fragipan, was investigated in order to determine whether there is a lithological discontinuity between the parent material of the upper and lower sequum. Differences observed between the two sequa in respect to the mineralogy of the heavy and light, silt‐size fractions may be accounted for by a progressive decrease in the weathering intensity with depth and are not suggestive of a lithological discontinuity in parent material. The clay mineralogy for the B horizons of the two sequa was similar for the < 0.2µ and the 0.2µ to 2.0µ fractions, taken individually. However, for the total clay fraction, a higher percent of montmorillonite was found in the B′ 2 horizon of the lower sequum; this may be explained on the basis of illuviation.