Records of the Geological Survey of India, Volume 72, Issues 3-4The Survey, 1937 - Earthquakes |
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Page 351
... quartz from the ore liquid was prior to the deposition of much of the pyrite , but a very little persisted to a later stage , as is indicated by veins of quartz in pyrite . A very little quartz is seen to vein sphalerite and even ...
... quartz from the ore liquid was prior to the deposition of much of the pyrite , but a very little persisted to a later stage , as is indicated by veins of quartz in pyrite . A very little quartz is seen to vein sphalerite and even ...
Page 376
... quartz - porphyry ' ( 1931 , p . 22 ) and states , a gradation can be easily traced in this rock from a white quartz- porphyry through a schistose quartz - porphyry to an almost sericite . or muscovite - biotite - schist . The rock is ...
... quartz - porphyry ' ( 1931 , p . 22 ) and states , a gradation can be easily traced in this rock from a white quartz- porphyry through a schistose quartz - porphyry to an almost sericite . or muscovite - biotite - schist . The rock is ...
Page 377
... quartz in small rounded grains . They are unbedded , and when unfoliated , their jointing and weathering suggest an igneous rock . From hand- specimens they might be fine aplite , or quartz - porphyry , and speci- mens which might be ...
... quartz in small rounded grains . They are unbedded , and when unfoliated , their jointing and weathering suggest an igneous rock . From hand- specimens they might be fine aplite , or quartz - porphyry , and speci- mens which might be ...
Contents
MINERALS OF GROUP | 247 |
MINERAL CONCESSIONS GRANTED DURING THE YEAR | 298 |
Polished and Thin Section Technique in the Laboratory of the Geological | i |
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1.-General Report 3.-Mineral Production alluvium ankerite Aravalli artesian Assam Attock district Baluchistan beds Bihar Bihar and Orissa biotite boulangerite bournonite calc-gneisses cent Central Provinces chalcopyrite Chinji zone clay Coal coal-field Cretaceous cwts Danta deposits Earthquake Erinpura granite F. R. C. Reed Fauna feet felspar Fossil galena Geol Geological Survey Geology gersdorffite glacial glaciers Godavari Gondwana grey Hills Himalaya Idar India Indus Isa Khel Kashmir Limestone lode Lower Madras Manganese-ore Memoir Messrs Mica Middlemiss miles minerals Miscellaneous Notes molar Nagpur Narbada North North-West Northern Shan output P. L. Renewal Petroleum PLATE print).-Annual report print).-Geology Production of India Punjab pyrargyrite pyrite quartz quartzites Rajputana Raniganj replaced river rocks Salt-range sand sandstone Section Septem Sirohi Sivapithecus indicus Sivapithecus indicus Pilgrim Sivapithecus sivalensis Lydekker Siwaliks specimens sphalerite Surv Survey of India Tertiary tetrahedrite tons valued Upper Burma valley veins wolfram