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

analysis anomaly associated bands base basin belt block boreholes Calcutta carried chemical Circle clay coal collected completed comprising construction continued core covered deposits depth detailed developed Director district Division Divn drilling east ENGINEERING exploration exposed extension fault field flows folds Formation foundation geological geological mapping Geologist geophysical gneiss grade granite Group Headquarters holes indicated investigation Laboratory length lignite limestone located logging Lower magnetic major material mineral mineralisation Nagpur observed occurs officers pegmatites phyllite power house Pradesh present Project proposed quartz quartzite range recorded Regional reports represented revealed river rocks S/Shri samples sand sandstone scale schist seams sediments sericite shale shear sheets Shri soil sq km stage strike structure studies suggested surface surveys thickness tion traverses trending tunnel types units Upper values varying veins West zone