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Clay minerals in three podzol profiles


, : Clay minerals in three podzol profiles. Soil Sci Soc Amer Proc 18(4): 479-481

Clays from well-developed podzols from gray acid sandstone glacial tills of Kansan, Illinoian, and Wisconsin ages were identified. After removal of the free oxides, the predominant minerals in the clay were interstratified 2: 1 layer silicates, quartz, illite, and small quantities of kaolinite. Vermiculite or chlorite was present in the lower horizons of the older tills. The A2 horizons tended to be higher in quartz than the B and C2 horizons. Wisconsin clays were slightly higher in quartz than Illinoian or Kansan. The clays, while showing slight shifts with age and depth, were basically similar.

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