Abstract
SummaryCharacteristics of the soils include well‐defined horizons, very low pH values and base saturation percentages, and a slight but general increase in the silt‐plusclay content down the profile. X‐ray diffraction shows that the soil clays are rich in mica and chlorite with subsidiary amounts of kaolinite, goethite, and lepidocrocite. The general distribution of the clay minerals in the profiles studied suggests that the weathering of chlorite leads to the formation of kaolinite in the A horizons and to the accumulation of crystalline iron‐oxide minerals in the B horizons. The presence of kaolinite, taken in conjunction with recent clay mineral studies of Scandinavian and Canadian podzols, indicates that the Ben Lawers soils may pre‐date the last glacial period.
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