Records of the Geological Survey of India, Volume 127, Part 4
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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AssamMeghalaya TripuraMizoram and ManipurNagaland 332
Arunachal Pradesh 3951
Operation I Environmental Geology AssamMegalaya
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Abor addition Aizawl alignment anomaly ARUNACHAL PRADESH Assam assess associated axis bands bank bed rock Bhuban block Brahmaputra carried channel clay Code collected Complex comprises construction continued cover deposits depth detailed DISTRICT Division drilling East erosion excavated exposed faults field season flood Flood Plain flows fold Formation further geological mapping geotechnical gneiss grained grey Group highly hill identified indicated investigation limestone located lower mainly major Manipur material medium Meghalaya mineral mineralisation MIZORAM nature occur Older Operation power house present Project proposed quartz quartzite range regional represented right bank river road rocks samples sandstone scale schist sediments sequence shale shear Shillong siltstone slope sq.km stage strike structures studies suggested suitable surface Surma surveys taken terrace thick trace traverses trending Tripura tunnel types units upper upto valleys varies veins volcanics zone