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VOLUME 98 PART
The Brecciated Quartz Veins of Nurungo Hazaribagh
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affected alluvial altered ammonoids appears associated bands Barakar basalt base basins bauxite beds boundary faults brown characterised chemical clay coalfield conglomerate consists deposits depth detailed direction district east evidence extent faults ferruginous flows formation fossil Geol Geological Survey gneisses Gondwana grains gravel groundwater hematite important India indicates later laterite lateritisation leaching less lignite limonite lithomarge Lower major marked material metres minerals movement nature observed occasionally occurs origin pebbles period pisolites places plane Plate Pleistocene present quartz range Recent recorded region river rocks rounded sand sandstone sandy sandy clay sedimentary sediments seen sequence silica stage structures studies suggest surface Survey of India Tertiary thickness thin thrust trap tubewells types Upper valley varies veins weathering West yield zone