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A Note on the Stratigraphic Measurements of the Rocks of the IronOre 149156
Chhattisgarh in the field season 195657 the general sequence of the Purana forma
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acid alteration aluminium amount analyses anorthite appear bands beds biotite calcite calculated cell cent chemical chromite chromium clay complete composition concentration concretions considerably consists containing crystals curves deposits determined diameter differential thermal disintegration distribution district examination felspar ferrous fireclay folds formation formed formula fraction Geol Geological given goethite grains granite heavy hematite India indicate iron kaolin kaolinite laterite profile layer less limestone lower Madras magnetite material methods metres mica minerals muscovite observed obtained occur origin oxide particles percentage Pleistocene portions possible precipitation present quantity quartz quartzite ratio reflection result ripples rocks sample sand sandstone seen separation sequence sericite shales shear silica similar sodium solution specimen spinel stage structure surface Surv Table taken thickness upper varies weathering X-ray zone