Records of the Geological Survey of India, Volume 117, Part 1

alignment amphibolite analysis Andhra Pradesh anomaly Asstt Attended bands basalt basin bed rock belt Bihar biotite block boreholes Calcutta carried Chakraborty charnockite clay Coalfield collected comprising covering an area Deccan Trap depth Director district drill cores drill holes dykes earth dam exploration exposed flows folds Formation foundation garnetiferous geochemical geological mapping Geologist Jr geophysical geotechnical investigation Ghosh gneiss Gondwana grade granite gneiss Group Gupta Hydel Project Hyderabad Jaipur Karnataka Kumar Laboratory limestone line km located logged Lucknow mapped an area mica migmatite million tonnes mineral mineralisation Nagpur nala NE-SW NW-SE Orissa pegmatite phyllite pits power house quartz quartz veins quartzite Quaternary Region river rock types S/shri samples sandstone scale schist seams sediments shale shear Shri Singh slide slope spillway sq km sq km area Srivastava strike length studies surface surveys Tamil Nadu thick tion toposheet traverse mapping trending tunnel upto zone