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 73
... alkali magmas , sphene replaces ilmenite . " 2 THEORETICAL CONSIDERATION From the theoretical standpoint the two series viz . , alkali - basalt and tholeiite are closely knit . At present the view is gaining in stride that the ...
... alkali magmas , sphene replaces ilmenite . " 2 THEORETICAL CONSIDERATION From the theoretical standpoint the two series viz . , alkali - basalt and tholeiite are closely knit . At present the view is gaining in stride that the ...
Page 74
... alkali - basalt type from the tholeiitic " ( idem . ) , as may be gathered from the usual increase of Al2O3 in the former until the last stage , compared with the decrease in the latter ; " to which the present instance is no exception ...
... alkali - basalt type from the tholeiitic " ( idem . ) , as may be gathered from the usual increase of Al2O3 in the former until the last stage , compared with the decrease in the latter ; " to which the present instance is no exception ...
Page 75
... alkali - basalt magmas are likely to be generated at greater depths from the same primary source rocks . Fusion of amphibolite , which takes place at a much greater range of temperatures than basalt , would not normally yield basaltic ...
... alkali - basalt magmas are likely to be generated at greater depths from the same primary source rocks . Fusion of amphibolite , which takes place at a much greater range of temperatures than basalt , would not normally yield basaltic ...
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Common terms and phrases
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