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Micromorphological and analytical studies of the fine matrix of an Australian humus iron podzol
Author(s) -
MILNES A. R.,
FARMER V. C.
Publication year - 1987
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1987.tb02157.x
Subject(s) - gibbsite , podzol , allophane , kaolinite , horizon , humus , chemistry , organic matter , deposition (geology) , mineralogy , geology , clay minerals , soil science , soil water , geomorphology , physics , organic chemistry , astronomy , sediment
SUMMARY Detailed micromorphological observations and associated electron probe microanalyses are used to examine the proposition that kaolinite and gibbsite in the B horizon of a humus iron podzol could arise by transformation of allophanic deposits. The B horizon of this podzol is highly complex. In the upper B horizon, this complexity is due to alternating episodes of the influx of organic matter and the deposition of allophanic material; evidence for the separate deposition of allophane and organic matter is presented. Material within the B horizon that has gibbsiporphyric fabric appears to have arisen by crystallization of gibbsite from aluminium‐rich gels deposited before the main influx of allophanic material; there is no convincing evidence that allophanic material has transformed to kaolinite or gibbsite.