Records of the Geological Survey of India, Volume 119, Part 1

amphibolite analysis anomaly bands basalt basin bed rock belt Bijawar biotite block boreholes Calcutta charnockite clay coalfield comprising Deccan Trap deposits dips Director district Divn dolomite drill cores drill holes dykes exploration exposed field season flows folds Formation fossils geochemical geological mapping Geologist Geology Division geophysical geotechnical investigation gneiss Gondwana grade granite granite gneiss grey Group of rocks Headquarters Hydel Project indicated intrusive km long Laboratory limestone line km located logging Madhya Pradesh magnetic Maharashtra mapped an area Meghalaya mica schist migmatites million tonnes mineral mineralisation Nagpur nala occurs pegmatites phyllite power house Pradesh quartz quartz veins quartzite Quaternary regional river rock types sand sandstone scale schist sediments sequence shale shear zone sheets Shri siltstone spillway sq km sq km area Srivastava strike length studies sulphide surface surveys thickness tion traverses trench trending tunnel valley varying Vindhyan West