Records of the Geological Survey of India, Volume 120, Part 1

analysis anomalies associated Attended bands basalt basin belt block boreholes Calcutta carried clay coal collected completed comprising construction contain continued core course covered deposits depth detailed developed Director DISTRICT DIVISION drilling east eastern exploration exposed fault field flows Formation foundation geological mapping Geologist geophysical geotechnical gneiss grained granite ground Group Headquarters holes identified included India indicated interpretation Laboratory length lignite limestone located logging Lower magnetic major material meeting mineral mineralisation Nagpur occur officers OPERATIONS Pradesh prepared present programme progress Project proposed quartz quartzite range received recorded regional reports river rock S/Shri samples sand sandstone scale Scheme schist seams sediments shale shear Shri sq km stage structure studies suggested surface surveys taken thickness tion toposheet traverses trending tunnel units upto various varying West zone