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AMORPHOUS CONSTITUENTS OF SOME HIGH ALTITUDE SOILS OF THE SOUTH ISLAND OF NEW ZEALAND
Author(s) -
MILESTONE N. B.,
WILSON A. T.
Publication year - 1977
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.1365-2389.1977.tb02245.x
Subject(s) - allophane , frost weathering , soil water , amorphous solid , ferrous , frost (temperature) , geology , volcano , geochemistry , mineralogy , ferric , altitude (triangle) , aluminosilicate , pedogenesis , chemistry , materials science , metallurgy , soil science , crystallography , geomorphology , geometry , mathematics , biochemistry , catalysis
Summary Soils developed at high altitudes in the South Island, New Zealand have several pedological properties similar to the volcanic allophane soils of the North Island. Their clay fractions consist of finely divided parent material with some degree of ordering and some oxidation of ferrous to ferric iron, but because they are so finely divided they give no X‐ray diffraction patterns, and their IR spectra are typical of amorphous aluminosilicates. They are shown to have structure by electron microscopy and thermal analysis. It is suggested that the clays have been produced by the grinding together of stonesby frost action, and that similar material probably exists in other alpine areas and in polar regions where frost action is common.