Records of the Geological Survey of India, Volume 113, Parts 4-6The Survey, 1980 - 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 62
... exhibit wavy extinction ( Photo 9 ) , thus indi- cating the effects of stress . Percentage of plagioclase in the ... exhibits peripheral alteration to a greenish hornblende . Some of the horn- blendes appear to be primary . In the ...
... exhibit wavy extinction ( Photo 9 ) , thus indi- cating the effects of stress . Percentage of plagioclase in the ... exhibits peripheral alteration to a greenish hornblende . Some of the horn- blendes appear to be primary . In the ...
Page 43
... exhibit all stages of gradation to breccia on one side and ash on the other . The tuffs generally contain fragments of different types , however , depending on the nature of dominant fragmentary material , they have been designated as ...
... exhibit all stages of gradation to breccia on one side and ash on the other . The tuffs generally contain fragments of different types , however , depending on the nature of dominant fragmentary material , they have been designated as ...
Page 51
... exhibit considerable departure from the above definition of Smith , and as such do not appear to constitute pyroclastic or ash flows . These pyroclastic beds are also different in megascopic and microscopic characters from those ...
... exhibit considerable departure from the above definition of Smith , and as such do not appear to constitute pyroclastic or ash flows . These pyroclastic beds are also different in megascopic and microscopic characters from those ...
Contents
Part | 1 |
Problems of correlation of PreGondwana rock units of Arunachal Pradesh and adjoining areasa review | 15 |
The Sung Valley alkaline ultramafic carbonatite complex East Khasi and Jaintia Hills districts Meghalaya | 24 |
Copyright | |
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Common terms and phrases
alluvium anorthosite assemblage associated augite bands basalt flows basin beds belt biotite Bombay bore holes borehole calcite carbonatite Charnockite chert chlorite chromite clay clinopyroxene coal complex Deccan Trap deposits developed district drainage dykes emplaced fault felspar fluorite folds Formation fossil fragments gabbro geochemical Geol Geological Survey geomorphic gneisses Gondwana grade grains granite granulites greisens grey groundmass Group hill Himalayas ijolite indicated intrusive laterite layers limestone magnetite Manipur mapping Meghalaya metamorphic metres migmatites mineralisation minerals Narmada occur olivine opaque ophiolite phenocrysts phosphorite phyllite plagioclase Plate porphyritic Pradesh present pyroclastic pyroxene pyroxenite quartz quartz veins quartzite region river rocks samples sandstone schist seam sedimentary sediments sequence serpentinite shale sillimanite soil stratigraphic structure studies sub-surface surface Surv Survey of India Tapti tectonic thickness thin tion trending tuff ultramafic Unpublished GSI Report upto Vaghur valley volcanic zone