Records of the Geological Survey of India, Volume 109

analysis associated Attended bands basalt Bihar block boreholes calcareous carried CIRCLE clay coal collected completed comprising continued core covered deposit depth detailed developed Director DISTRICT DIVISION drilling east Engineer examined exploration exposed fault field flows folds Formation geological Geological Survey gneiss grade grained granite grey Group hills holes horizon included India indicated known LABORATORY length limestone located Lower mapping measured meeting mineralisation minerals Nagpur Nummulites observed occur Officer period phyllite pits places Plate Pleistocene Pradesh present Project proposed quartz quartzite recorded Region reported represented river rocks S/Shri samples sand sandstone Sarvashri scale schist sediments shale shear Shri sq km stage strike stromatolites structure suggested surface Survey Survey of India thickness tion traverse trend types units Upper upto valley varies West zone