Records of the Geological Survey of IndiaGeological Survey of India, 1939 - 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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Results 1-5 of 51
Page ii
... felspar . Mic . slide 24680 . X 24 . FIG . 2. - Cassiterite replaced and veined by beryl . Mic . slide 24687 . X 24 . FIG . 3. - Beryl replaced along its cleavage , at walls of scheelite vein . Mic . slide 24685. X 24 . FIG . 4 ...
... felspar . Mic . slide 24680 . X 24 . FIG . 2. - Cassiterite replaced and veined by beryl . Mic . slide 24687 . X 24 . FIG . 3. - Beryl replaced along its cleavage , at walls of scheelite vein . Mic . slide 24685. X 24 . FIG . 4 ...
Page iv
... felspar , etc. ( light ) and garnet ( G ) . A few crystals of hypersthene ( H ) always seem to have survived the crushing . PLATE 21. — FIG . 1. - Typical hypersthene - gneiss . FIG . 2. Typical soda - granite . FIG . 3. - Biotite ...
... felspar , etc. ( light ) and garnet ( G ) . A few crystals of hypersthene ( H ) always seem to have survived the crushing . PLATE 21. — FIG . 1. - Typical hypersthene - gneiss . FIG . 2. Typical soda - granite . FIG . 3. - Biotite ...
Page 26
... felspar grains . Heavy minerals are abundant , particularly tourmaline and garnet . 48.1 per cent . of this rock is soluble in hydrochloric acid , and a partial analysis gives F203 + Al2O3 , 0 · 90 per cent . , CaO , 18-77 per cent ...
... felspar grains . Heavy minerals are abundant , particularly tourmaline and garnet . 48.1 per cent . of this rock is soluble in hydrochloric acid , and a partial analysis gives F203 + Al2O3 , 0 · 90 per cent . , CaO , 18-77 per cent ...
Page 48
... felspar , biotite and muscovite mica , garnet , chlorite , tourmaline and apatite . Of these minerals only felspar and mica are decomposable by ordinary atmospheric agents , and as the water in the catchment area runs rapidly through it ...
... felspar , biotite and muscovite mica , garnet , chlorite , tourmaline and apatite . Of these minerals only felspar and mica are decomposable by ordinary atmospheric agents , and as the water in the catchment area runs rapidly through it ...
Page 61
... felspar with interstitial calcite . The granite is mostly coarse , biotitic and gneissic ; thin bands richer in biotite are almost schistose , and white bands consist almost entirely of tourmaline , quartz , and felspar . Sometimes a ...
... felspar with interstitial calcite . The granite is mostly coarse , biotitic and gneissic ; thin bands richer in biotite are almost schistose , and white bands consist almost entirely of tourmaline , quartz , and felspar . Sometimes a ...
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1.-General Report 3.-Mineral Production Aravalli Assam Baluchistan basal Bengal Bihar biotite Bombay calcareous Calcutta cassiterite Central Provinces charnockite Chinji Coal Coal-field conglomerate Congr Coulson Cretaceous Deccan trap deposits Dhok Pathan Diener district earthquake east Eastern Eastern States Agency Eocene F. R. C. Reed fauna felspar formation Fossil garnet genus Geol Geological Survey Geologist Geology gneisses gneissic Gondwana granite Hills Himalayas India intrusive Journ Kashmir limestone Lower Madras Memoir metamorphic meteorite Mica miles minerals Mining Miscellaneous Notes Nagpur Narbada North-West Northern Shan occur outcrops Paliyad Permian phyllites Pinjor plateau print).-Annual report Proc Production of India Punjab quartz quartzite Rajputana Red Beds river rocks rupees Sahni Salt Range sandstones schists shales sheet Siwalik Southern species specimens Surv Survey of India Tertiary Trias Triassic Twenty-fourth Ind Upper Burma valley veins Vindhyan VOL VOL Western wolfram Yunnan