Records of the Geological Survey of India, Volume 97Geological Survey of India, 1969 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 50
... Bihar , Rajasthan and Andhra Pradesh ; those of Bihar and Rajasthan have been studied in detail by the authors in recent years . The paper attempts to compare and contrast the geological milieu of pegmatite formation in both the belts ...
... Bihar , Rajasthan and Andhra Pradesh ; those of Bihar and Rajasthan have been studied in detail by the authors in recent years . The paper attempts to compare and contrast the geological milieu of pegmatite formation in both the belts ...
Page 51
... Bihar . The Rajasthan pegmatite belt has been producing commercial muscovite during the last sixty years or so ... Bihar pegmatites ( 955 ± 40 m.y. ) compared to the Rajasthan pegmatites ( 580 ± 20 m.y. ) . The metamorphic country ...
... Bihar . The Rajasthan pegmatite belt has been producing commercial muscovite during the last sixty years or so ... Bihar pegmatites ( 955 ± 40 m.y. ) compared to the Rajasthan pegmatites ( 580 ± 20 m.y. ) . The metamorphic country ...
Page 61
... Bihar Mica - field . Bull . Geol . Min . Met . Soc . Ind . , No. 11 , pp . 31-40 . MAHADEVAN , Τ . Μ .. 1965. Structure and Petrology of the Porphyritio Granite around Charkapathal , Monghyr Dist . , Bihar , India . Dr. D. N. Wadia ...
... Bihar Mica - field . Bull . Geol . Min . Met . Soc . Ind . , No. 11 , pp . 31-40 . MAHADEVAN , Τ . Μ .. 1965. Structure and Petrology of the Porphyritio Granite around Charkapathal , Monghyr Dist . , Bihar , India . Dr. D. N. Wadia ...
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15th April alkali alkali-basalt alluvium Alwar Alwar valley basalt basalt magma beds belt Bengal Bihar borehole Calcutta carbonate coal coal-bearing unit coalfield Coccolithus sp Coniacian Contai country rock cracks crystallisation Daling Thrust Damudas Darjeeling Deccan Trap depression depth developed Diameter district dykes east east-west emplaced Eocene epicentre felt folds formation fossil G. S. I. Type Geol GEOLOGICAL SURVEY Gondwanas grains granitic groundwater hectares India Jour kankar Kirthar Middle Eocene Kutch lake lamprophyre lithological Lonar crater magma malachite material metamorphism meteorite craters mineral NaCl NaHCO3 nannoplanktons occurs olivine Pachydesmoceras patches pegmatites plagioclase PLATE polarised light pukka pumped quantity of reh quartz quartzite Rajasthan Raniganj Record Sagar Island sajji samples collected sand seams sediments Siwaliks sodium Specimen Stradner and Papp structure Surv SURVEY OF INDIA Talchir tenorite thickness tholeiitic tonnes transmitted and polarised tubewells vitrinite volcanic zone