Records of the Geological Survey of India, Volume 114

alignment analysis anomaly associated bands bank basalt base belt block boreholes carried chemical Circle clay collected completed comprising construction continued core covered deposits depth detailed dips Director DISTRICT Division drill holes drilling dykes east encountered examined exploration exposed fault field flows folds Formation foundation four Garhwal geological mapping Geologist geophysical gneiss grade granite grey Group Headquarters included indicated investigation joints Laboratory length limestone located logging lower magnetic major mineral mineralisation Nagpur observed occur phyllite pits power house Pradesh present proposed quartz quartzite recommended regional reported respectively river road rock rock types samples sandstone scale Scheme schist sediments sericite shale shear Shri soil spillway sq km stage strike structure studies suggested surface surveys thickness thin tion toposheet trace traverse trending tunnel Upper upto valley varying veins width zone