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MAP COMPILATION AND PUBLICATION DIVISION
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analysis anomaly associated bands basalt base basin belt block boreholes Calcutta carried clay coal collected completed comprising construction continued core covered deposits depth detailed dips Director district Division drilling east exploration exposed extension fault field flows folds Formation foundation Garhwal geological geological mapping Geologist geophysical gneiss grade granite grey Group Headquarters holes indicated intrusive investigation Laboratory length lignite limestone located logging Lower magnetic major material mineral mineralisation Nagpur observed occurs pegmatites phyllite places power house Pradesh present Project proposed quartz quartzite range recorded regional represented revealed river rocks S/Shri samples sand sandstone scale scheme 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