Records of the Geological Survey of India, Volume 94The Survey, 1959 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 214
... common in this area . They are usually porphy- ritic containing phenocrysts of greyish white felspar and less frequently of olivine . These rocks are exposed in many places in the valley bottoms and along the foot - hills and the lower ...
... common in this area . They are usually porphy- ritic containing phenocrysts of greyish white felspar and less frequently of olivine . These rocks are exposed in many places in the valley bottoms and along the foot - hills and the lower ...
Page 249
... common feature . The chief impurity in such ores is iron - oxide . The best The chocolate - coloured or pinkish host rock contains anything up to 11 per cent . manganese . This rock sometimes grades into highly siliceous manganese - ore ...
... common feature . The chief impurity in such ores is iron - oxide . The best The chocolate - coloured or pinkish host rock contains anything up to 11 per cent . manganese . This rock sometimes grades into highly siliceous manganese - ore ...
Page 262
... common with grains about 0.9 mm . across . In such aggregates the two minerals occur in more or less equal proportion . The mutual boundary relationship between the two is apparent . Elsewhere , areas of ilmenite grain - aggregate ...
... common with grains about 0.9 mm . across . In such aggregates the two minerals occur in more or less equal proportion . The mutual boundary relationship between the two is apparent . Elsewhere , areas of ilmenite grain - aggregate ...
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Common terms and phrases
Ajanta Caves amphibole amphibole bearing quartzites amygdaloidal assemblage Balasore Balasore coast basalts beds biotite calc-silicate rocks calcite cent chambers chondrules Coarse colour convolute laminations Cretaceous crystals Deccan Traps dipping district dolerites dune sands dykes east enstatite felspar ferruginous Figured specimen flows folds foraminifera formations G.S.I. Type garnet Genus Geol Geological Geologist Gir forest grade grains granites heavy mineral hematite hills hornblende ilmenite intergrowth kilometres kyanite length Lenticulina limestone magnetite manganese manganese content manganiferous khondalite Marginulina massive trap meta-sediments metamorphism meteorite metres metres long metres wide nala Nishkhal north-west occur old dunes olivine opaques Orissa outcrop phenocrysts plagioclase porphyritic porphyritic trap pyroxenes quartz quartzites Rajasthan Reuss ridge rutile samples sand dunes Sastry schistosity sediments shales siliceous sillimanite Soft vesicular species Subarnarekha river Surv sutures thickness thin trend Trichinopoly Utatur stage veins vesicles vesicular trap width zircon