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AIRBORNE MINERAL SURVEY AND EXPLORATION WING
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alignment alluvium analyses bands bank bauxite Bihar block boreholes carried Circle clay coal collected completed comprising consists construction continued copper core covered deposits depth detailed dips direction Director district Division drilling east electrical encountered examined exploration exploratory exposed extension fault field folds foliation formations foundation further geological mapping Geologist gneiss grade grained granite granite gneiss Groundwater holes included India indicated investigation joints Laboratory laterite length limestone located logging measurements metres mica mineralisation minerals observed occurs officers pegmatite period phyllites pits places Pleistocene Pradesh present Project proposed quartz quartzite range recommended recorded Region reported river rock types S/Shri samples sand sandstone scale Scheme schist shales shear Sheets Shri soil strike studies suggested survey systematic thickness thin toposheet traverse trending tubewells tunnel unit upto valley varies veins weathered West zone