Records of the Geological Survey of India, Volume 128, Part 4Vols. 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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AIZAWL DISTRICT arenaceous argillaceous Arunachal Pradesh Assam bands Barail Group biotite Bokabil borehole CACHAR clay coal Code comprises construction core Dibang Valley Disang Group dolomite East Siang Eocene erosion excavation exposed faults field season fold Geoenvironmental Geophysical geotechnical gneiss granite granitoids grey Hills District indicate joint KALIYANI LINEAMENT Karbi Anglong District Khasi Greenstones Kumar limestone Litang lithostratigraphy lithounits located mation medium grained Meghalaya mineral mineralisation Mizoram molybdenite Mukatung Nagaland NE-SW occur overlain OVERVIEW pegmatitic platinoids power house prone areas quartz veins Quaternary Ranganadi river rockmass samples sandstone scale schist sediments Sela Group sequence shale shear Shillong Siang District siltstone slope soil sq km sq.km structure Surma Surma Group synclinal systematic geological mapping tectonic Tertiary thick TINSUKIA DISTRICT tion Tipam Group toposheet traverse trend Tripura tunnel ultramafic Unconformity West Kameng district zone ܐ ܐ ܐ ܐ ܙ ܐ ܙ ܐ ܙ