Records of the Geological Survey of India, Volume 116, Issue 1

analysed anomaly associated attended bands Bangalore basalt basin belt block boreholes Calcutta carried Chemical Circle clay coal collected complex comprising construction continued core covered deposits depth detailed developed Director District Division drilling east Engineering examined exploration exposed fault field flows folds Formation foundation geological geological mapping Geologist Jr Geologist Sr Geophysical gneiss grade granite Group Headquarters held holes Hyderabad identified India indicated investigation Laboratory length lignite limestone located logging Lower Lucknow magnetic major meeting mineral mineralisation Nagpur North occurs officers phyllite Pradesh prepared present Project proposed quartz quartzite range recorded Region reported river rock rock types S/Shri samples sandstone scale schist sediments shale shear sheets Shri soil sq km strike structures studies suggested surface surveys thickness traverse trending tunnel units upto varying veins West zone