Records of the Geological Survey of India, Volume 108, Part 1
Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals.
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NORTH EASTERN REGION
Asbestos Barytes Bauxite Copper Clay Diamond Fluorite
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alignment analysed associated bands bank basic bauxite biotite block boreholes carried Circle clay collected comprising consists construction continued copper core covered deposits depth detailed developed dips direction Director DISTRICT Division drill holes drilling dykes east encountered examined exploration exposed extends fault field flows folds Formation foundation Garhwal geological geological mapping Geologists gneiss grade grained granite graphite grey Group hill indicated intrusives joints Laboratory length limestone located major mineralisation minerals occur officers pegmatite phyllites pits places plane power house PRADESH present Project proposed quartz quartzite ranging recommended Region reported represented river rocks samples sand sandstone Sarvashri scale schist sediments sequence sericite shales shear Shri soil sq km strike structure studies suggested surface surveys thick thin thrust traverse trending tunnel types units Upper valley varies veins zone