Records of the Geological Survey of India, Volume 115, Parts 3-4The Survey, 1987 - 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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Page 33
... stage melt . The ocellar structures of the camptonites of the present area are similar to type II structures and so can be interpreted as segregation of late stage melts drawn into gas vesicles in the crystalline mesh . It has been ...
... stage melt . The ocellar structures of the camptonites of the present area are similar to type II structures and so can be interpreted as segregation of late stage melts drawn into gas vesicles in the crystalline mesh . It has been ...
Page 76
... Stage and Tikak Parbat Stage ( in as- cending order ) or simply as Coal Measures . Evans clubbed another stage named as Naogaon Sandstone Stage with the Baragolai and Tikak Parbat and grouped the three under Barail with the Naogaon ...
... Stage and Tikak Parbat Stage ( in as- cending order ) or simply as Coal Measures . Evans clubbed another stage named as Naogaon Sandstone Stage with the Baragolai and Tikak Parbat and grouped the three under Barail with the Naogaon ...
Page 78
... STAGE ( 4100 ft . ) Shale and bedded sand- stone 1200 ft . Shale and sandy shale 80Q ft . Bedded and thin bedded sandstone , shale , sandy shale 1000 ft . Bedded & thin bedded LAISONG sandstone with some 1600 ft . shale & sandy shale STAGE ...
... STAGE ( 4100 ft . ) Shale and bedded sand- stone 1200 ft . Shale and sandy shale 80Q ft . Bedded and thin bedded sandstone , shale , sandy shale 1000 ft . Bedded & thin bedded LAISONG sandstone with some 1600 ft . shale & sandy shale STAGE ...
Contents
A NOTE ON THE EVOLUTION OF THE MINERAL | 17 |
Pant | 24 |
A R Nambiar | 43 |
Copyright | |
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aegirine alkaline rocks Arunachal Pradesh assemblage Barail Range bedded biotite borehole Brahmaputra camptonites carbonatite Chalcopyrite charnockite chlorite Coal cordierite deposits Disang dissected hills drainage dyke Evans feldspar feldspathic ijolite flood plain foliation fractured garnet Geol GEOLOGICAL SURVEY gneiss Golagar basin Golagar Nala grains GSI Rec 115 Hills district Himalaya ijolite immiscibility Indravati river inner belt Kohima Kohima synclinorium Kopili Koraput lamprophyres landforms magma magnetite Manipur Meghalaya metamorphic metapelites Mikir hills mineral mineralised zone muscovite Nagaland Nala Naogaon Naogaon Sandstone NE-SW occur Orissa orthoclasite phenocrysts Phyangla Plate point bar polymetallic porphyroblasts Potin Formation pyrite pyrrhotite quartz Ranga River Ranga Valley Rec 115 pts region ridge and valley samples San Nala sandstone schist shale Shillong staurolite Structural Plateau Subansiri district sulphide mineralisation Surma Surv SURVEY OF INDIA synclinorium tectonic Tikak parbat tinguaite trending tributaries type area Umrong reservoir units Upper Assam upto