Records of the Geological Survey of India, Volume 128, 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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Aizawl Arunachal Pradesh Assam bands bank Barail block borehole carried chemical clay coal Code collected comprises construction core covered depth Disang District Division dolomite East Eastern erosion excavation exposed Extended faults field fold Formation foundation further geological mapping gneiss grade grained granite granitoids grey ground Group GSI Rec highly Hills identified India indicate joint Khasi limestone limit located Lower material measures medium Meghalaya mineral mineralisation mining Mizoram nature Nummulites occur OVERVIEW places power house present progress prone proposed quartz ranges Region reported river road rock samples sandstone scale schist season sediments seen sequence shale shear Shillong siltstone slope soil stage structure suggested suitable surface Surma SURVEY systematic geological taken Tertiary thick tion Tipam toposheet traverse trend tunnel ultramafic units upper Valley varies veins zone