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The Brecciated Quartz Veins of Nurungo Hazaribagh
On the Genesis of Residual Bauxite in India by M K
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affected alluvial Alluvium ammonoids appears associated bands Barakar basalt base basins bauxite beds boundary brown chemical clay coalfield coiling collection conglomerate considered consists deposits direction district east evidence extensive faults fauna ferruginous flowing formation forms fossils Geol Geological Survey gneisses Gondwana grains gravel groundwater India indicate Karewas later laterite lateritisation less lignite limit limonite lithomarge Lower major marked material measures metres Middle minerals nature observed occasionally occurs origin overlying pebbles period pisolites places Plate Pleistocene present quartz quartzites range Raniganj Recent recorded region represented river rocks sand sandstone sandy sedimentary sediments seen sequence shale silica Siwalik soil stage structures studies suggest surface Surv Survey of India Tertiary thickness thin trap tubewells Upper valley varies weathering West yield zone