Records of the Geological Survey of India, Volume 65The Survey, 1931 - 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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Page 83
... felspar rock and more rarely of tourmaline - pegmatite . An injection gneiss from S. W. of Wetlu contains quartz , felspar , biotite and garnet . The felspar is an alkali variety . The banding of the rock is due to coarser gained ...
... felspar rock and more rarely of tourmaline - pegmatite . An injection gneiss from S. W. of Wetlu contains quartz , felspar , biotite and garnet . The felspar is an alkali variety . The banding of the rock is due to coarser gained ...
Page 497
... felspar , 1.5 to 2 cm . by Porphyritic types . 1 cm . , set in a finer - grained groundmass contain- ing felspar , quartz and biotite . The felspars are often irregularly distributed , and in some cases show parallel orientation . The ...
... felspar , 1.5 to 2 cm . by Porphyritic types . 1 cm . , set in a finer - grained groundmass contain- ing felspar , quartz and biotite . The felspars are often irregularly distributed , and in some cases show parallel orientation . The ...
Page 498
... felspar and quartz as large phenocrysts . The felspar phenocrysts may or may not be rounded , and are dis- tributed irregularly or in bands in a groundmass of biotite , quartz and felspar . They measure 1.5 to 2 cm . by 1 cm . , some of ...
... felspar and quartz as large phenocrysts . The felspar phenocrysts may or may not be rounded , and are dis- tributed irregularly or in bands in a groundmass of biotite , quartz and felspar . They measure 1.5 to 2 cm . by 1 cm . , some of ...
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Common terms and phrases
albite albite-Ala alluvium anticline Aravalli axis bands Bawzaing beds biotite Burma cent chaung Chhibber clay Coal complex composition conglomerate cordierite cracked crystalline deposits district Dogra slate dolerite dykes earthquake east epicentral fault feet felspar folding formation fossil garnet Geol geological gneiss Gondwana granite Hazara hills Himalayan horizons hypersthene inches Infra-Trias intrusions Irrawaddian Journ Krol kyanite limestone locality Lower Messrs metamorphism mica miles minerals Mogok Murree north-west northern Nummulitics occur outcrop Panjal pegmatite Pegu pericline phyllites plagioclase plane Plate plateau portion Punjab quartz quartzites Rajputana Range Rangoon reported ridge river rocks Sakoli Salkhala Salt sand sandstones schists shales Shan sheet shock shows Shwebo sillimanite Simla Siwalik south-east specimens stage strata structure Surv Survey of India syncline syntaxis Tertiary thick thin tion tons tract twinning unconformity Upper valley veins village Vindhyans zone