CHANGES IN COMPOSITION OF CLAY MINERALS OF TWO ALFISOLS FORMED FROM FLUVIOGLACIAL MATERIAL FROM THE KRAJENSKA UPLAND (POLAND)

摘要

The clay fraction of fluvioglacial sediments as well as the luvic and argillic horizons of soils formed from it were studied. They were analysed with the use of the X-ray method. It was found that illite dominated in the clay fraction from all horizons. Simultaneously in a high percentage of mixed layers minerals, chlorite and a small amount of smectite and kaolinite was noted. The clay fraction of the argillic horizon contained a large amount of smectite, which was the result of the lessivage process. These changes were confirmed by the significantly illitic character of the luvic horizon.