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 eres 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 eres are usually compact , massive and hard . Siliceous ores are generally medium to ...
Contents
GEOLOGICAL SURVEY OF INDIA | 190 |
STRUCTURE | 200 |
SUMMARY AND CONCLUSIONS | 209 |
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amphibole amphibole bearing quartzites amphibolites amygdaloidal aperture Balasore banded magnetite-hematite quartzites basalts beds biotite calcite cent chambers chondrules colour convolute laminations Cretaceous Deccan Traps deposits 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 gneisses grade grains granites grey quartzites heavy mineral hematite hornblende ilmenite intergrowth Kalahandi kilometres kyanite length Lenticulina limestone magnetite manganese content manganese-ore manganiferous khondalite Marginulina massive trap meta-intrusives meta-sediments metamorphism metres metres long metres wide Nishkhal occur old dunes olivine opaques outcrop pebbles phenocrysts plagioclase porphyritic porphyritic trap pyroxenes quartz quartzites Reuss ridge rutile samples sand dunes schistosity sediments shales siliceous sillimanite Soft vesicular species Subarnarekha Subarnarekha river Survey of India sutures thickness thin trend Utatur stage veins vesicles vesicular trap white gritty quartzites width Yerabali zircon