Records of the Geological Survey of India, Volume 114, Part 1

alignment analysed anomaly associated bands bank belt block body boreholes carried Circle clay coalfield collected completed comprising construction continued core covered deposits depth detailed developed Director DISTRICT Division drilling east encountered examined exploration exposed fault field folds Formation Garhwal geological mapping geophysical gneiss grade grained granite grey ground Group Headquarters holes Hydel India indicated investigation Laboratory length limestone located logged magnetic major measures mica mineralisation minerals observed occur phyllite pits power house Pradesh prepared present proposed quartz quartzite regional reported river road rock rock types samples sandstone scale Scheme schist seams sector sediments sericite shale shear sheet Shri slate soil sq km stage strike structural studies suggested surface surveys taken thickness thin tion toposheet trace traverse trending tunnel Upper upto valley varying veins West zone