Mineralogy of a Few Entisols

Study on mineralogy of sand, silt and clay fractions of a few Entisols of West Bengal show that quartz,feldspar and mica are the major silicate minerals in sand and siltfractions. In the clay fractions, the dominant clay mineral is mica in association with minerals like kaolinite, smectite, vermiculite, chlorite, microcline coupled with considerable amount of amorphous mineral. Mica, feldspar and chlorite are considered as partly inherited from parent materials and weathering sequence of mica has been shown. Minerals are in vermiculite weathering stage calculated from weathering means.