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ENGINEERING GEOLOGY INVESTIGATIONS
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alignment Assistant associated Asstt bands Block boreholes carried Central Circle clay coal coalfield collected completed comprise consists construction continued copper covered deposits depth detailed dips district Division dolomite drilling east Engineer examined exposed fault field folded formations foundation further Geol geological geological mapping Geologists Geophysics gneiss grade granite groundwater Headquarters hill holes India indicated investigation laboratory length lignite limestone located Long Lower Madras mapping Scale measurements Meeting metre million tonnes mineralisation minerals northern occur Office pegmatite period phyllite places Pradesh prepared present Project proposed quartz quartzite ranging received recommended Regional reports river rocks samples sand sandstone Sarvashri schist seams seen Senior shale sheets Shri southern strike structure suggested suitable Superintending surface Survey Technical thickness thin trending tunnel types Upper varies veins water supply zone