Records of the Geological Survey of India, Volume 115, Part 1

alignment analysed anomalies associated attended bands bank basin Bihar block boreholes Calcutta carried Central Circle clay coal coalfield collected comprising construction continued core covered deposits depth detailed determinations dips Director district Division drilling East encountered examined exploration exposed fault field folds Formation foundation geological Geologist geophysical gneiss grade granite grey Group Headquarters Hills holes included India indicated investigation laboratory length limestone located logging magnetic major mapping meeting million mineralisation minerals Nagpur North occur officers phyllite power house Pradesh prepared present progress Project proposed quartz quartzite recorded regional reported river rock types rocks S/Shri samples sand sandstone scale Scheme schist seams sector sediments shale Shri soil sq km stage strike structural studies suggested surface surveys thickness thin tion toposheet traverse trending tunnel units valley various varying veins West zone