Records of the Geological Survey of India, Volume 108
The Survey, 1977 - Earthquakes
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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analysed appears associated bands bank basalt base beds belt block boreholes carried Central Circle clay coal collected comprising construction contain continued core covered deposits depth detailed developed direction Director DISTRICT Division drilling east eastern examined exploration exposed extension fault field flows folds Formation fossils foundation further geological geological mapping Geologists gneiss grade grained granite grey Group holes horizon India indicated laboratory length limestone located Lower major material mineralisation minerals nature observed occur officers phyllites places Plate Pradesh prepared present Project proposed quartz quartzite range recorded Region reported represented river rocks samples sandstone Sarvashri scale schist seams sediments seen sequence sericite shales shear Shri soil sq km strike structures studies suggested surface Survey thick thin traverse trending tunnel types units Upper valley varies veins village zone