Records of the Geological Survey of India, Volume 109

analysis Assistant associated Asstt Attended bands basalt Bihar block boreholes calcareous carried CIRCLE clay coal collected complex comprising continued core covered deposit depth detailed developed Director DISTRICT DIVISION drilling east Engineer examined exploration exposed fault flows folds Formation foundation further geological Geologist Jr Geologist Sr geophysical gneiss grade granite grey Group Headquarters hills holes horizon India indicated known LABORATORY length limestone located Lower mapped measurements meeting mineralisation minerals Nagpur observed occur Officer period phyllite pits Plate Pleistocene Pradesh present Project proposed quartz quartzite Quaternary recorded Region reported represented river rock S/Shri samples sand sandstone Sarvashri scale schist sediments shale shear Shri sq km stage strike stromatolites structure suggested surface Survey thickness tion Trap traverse trending tunnel types units Upper upto valley varies veins zone