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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Mineral Investigation 67
NORTH EASTERN REGION
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alignment analysed associated bands bank basic bauxite biotite block boreholes carried channel 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 extension 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 logged major mica million mineralisation minerals occur officers pegmatite phyllites pits places plane power house PRADESH present Project proposed quartz quartzite ranging recommended Region reported represented reserve river rock samples sand sandstone Sarvashri scale schist seams sequence sericite shale Shri soil sq km strike structure studies suggested surface surveys thick thin tonnes traverse trending tunnel types units Upper valley varies veins zone