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 192
... mainly calcite and altered olivine . Opaques ( mainly magnetite ) and spinel are the chief accessories . Chemical analysis indicates 3 to 16 per cent . MgO . , the high percentage of which can be ascribed to the altered olivine . In a ...
... mainly calcite and altered olivine . Opaques ( mainly magnetite ) and spinel are the chief accessories . Chemical analysis indicates 3 to 16 per cent . MgO . , the high percentage of which can be ascribed to the altered olivine . In a ...
Page 193
... ( mainly mangnetite ) as shown in Table 3 . TABLE 3 Modal analyses of pebbly quartzites Minerals Quartz B'otite Cordierite Sillimanite Opaques 1 2 3 Volume % Volume % Volume % 35 61 52 14 33 21 - 24 37 14 6 3 100 100 100 1. Specimen from ...
... ( mainly mangnetite ) as shown in Table 3 . TABLE 3 Modal analyses of pebbly quartzites Minerals Quartz B'otite Cordierite Sillimanite Opaques 1 2 3 Volume % Volume % Volume % 35 61 52 14 33 21 - 24 37 14 6 3 100 100 100 1. Specimen from ...
Page 197
... mainly magnetite . Granites and gneisses The granites and gneisses form the country rock surrounding the land of ... mainly hornblende and opaques ( mainly magnetite ) as given in Table 8. Anthophyllite and sphene are noticed in a few ...
... mainly magnetite . Granites and gneisses The granites and gneisses form the country rock surrounding the land of ... mainly hornblende and opaques ( mainly magnetite ) as given in Table 8. Anthophyllite and sphene are noticed in a few ...
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