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Engineering Geology Division
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alignment analysed associated bands bank basic biotite block boreholes carried channel Circle clay collected comprising consists construction continued copper core covered deposits depth detailed developed dipping direction Director DISTRICT Division drill holes dykes east encountered examined exploration exposed extends fault field flows folds Formation foundation Garhwal geological geological mapping Geologists geophysical gneiss grade grained granite grey Group hill indicated intrusives joints Laboratory length limestone located logged Lower major material mineralisation minerals occur officers pegmatite phyllites pits places plane power house PRADESH present Project proposed quartz quartzite ranging recommended Region reported represented river rock samples sand sandstone Sarvashri scale Scheme schist sequence sericite shale Shri slates soil spillway sq km strike structure studies suggested surface surveys terraces thick thin thrust traverse trending tunnel types units Upper valley varies veins zone