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MINERAL INVESTIGATIONS 214
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alluvium analysis Assistant Attended bands beds Bihar block boreholes Building Calcutta carried Central chemical Circle clay coal collected comprising consisting construction continued copper covered deposits depth detailed dips Director district Division drilling Engineer estimated examined exploration exploratory falling fault field formation found to occur foundation geohydrological geological geological mapping Geologist Geophysics gneisses grade granites ground groundwater in-Charge included India indicated investigation Laboratory length limestone located logging Long meeting million tonnes mineral mineralisation Mining Nagpur observed officers period phyllites pitting Pradesh prepared Project proposed quartz quartzites Rajasthan ranging received recommended Region reported reserves resistivity respectively revealed river rocks samples sandstones Sarvashri scale schists Senior shales sheets Shri strike studies suggested suitable supply surveys systematic Technical thickness thin topo traverses trend tubewells underlain Upper upto varying veins West zone