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CENTRAL PETROLOGICAL DIVISION
STRATIGRAPHY AND PALAEONTOLOGY DIVISION
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alignment analysis anomaly associated bands bank belt block bodies boreholes carried Circle clay collected completed comprising construction containing continued core covered deposits depth detailed dips Director DISTRICT Division drilling east encountered examined exploration exposed fault field folds Formation foundation Garhwal geological mapping geophysical gneiss grade grained granite grey Group Headquarters indicated intrusive investigation Laboratory length limestone located logged lower magnetic major measures mineral mineralisation minor observed occurs phyllite pits power house Pradesh prepared present proposed quartz quartzite recommended regional reported river road rock rock types samples sandstone scale Scheme schist sediments sericite shale shear sheet Shri slate soil spillway sq km stage strike structure studies suggested surface surveys taken thickness thin tion toposheet trace traverse trending tunnel upper upto valley values varying veins zone