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 193
Geological Survey of India. The quartzites consist of quartz and biotite with subordinate amounts of cordierite , sillimanite and opaques ( mainly mangnetite ) as shown in Table 3 . TABLE 3 Modal analyses of pebbly quartzites Minerals ...
Geological Survey of India. The quartzites consist of quartz and biotite with subordinate amounts of cordierite , sillimanite and opaques ( mainly mangnetite ) as shown in Table 3 . TABLE 3 Modal analyses of pebbly quartzites Minerals ...
Page 206
... Quartz - felspar rocks . - quartz , amphibole ( anthophyllite and horn- blende ) , biotite , garnet ( almandine * ) , cordierite , sillimanite , felspar , magnetite and muscovite . 2. Ferruginous rocks . - magnetite with subordinate ...
... Quartz - felspar rocks . - quartz , amphibole ( anthophyllite and horn- blende ) , biotite , garnet ( almandine * ) , cordierite , sillimanite , felspar , magnetite and muscovite . 2. Ferruginous rocks . - magnetite with subordinate ...
Page 249
... quartz , manganese rock , lithomargic layers and limonite - quartz layers . Structure and texture of the ores . - The high grade ores and ferruginous ores are usually compact , massive and hard . Siliceous ores are generally medium to ...
... quartz , manganese rock , lithomargic layers and limonite - quartz layers . Structure and texture of the ores . - The high grade ores and ferruginous ores are usually compact , massive and hard . Siliceous ores are generally medium to ...
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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