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 30
... fragments vary in size from 0.5 to 1.5 mm . Quartz constitutes the most dominant phase and forms clear patches in ordinary light ( 90 % of the fragments ) and is at places corroded by the altered glass groundmass , as well as being ...
... fragments vary in size from 0.5 to 1.5 mm . Quartz constitutes the most dominant phase and forms clear patches in ordinary light ( 90 % of the fragments ) and is at places corroded by the altered glass groundmass , as well as being ...
Page 43
... fragments also . The fragmentary phase comprises different types of basaltic fragments , fragments of pumice and volcanic glass , shale and siltstone , and of volcanic ejecta of earlier effusions . Petrographic characters of tuffaceous ...
... fragments also . The fragmentary phase comprises different types of basaltic fragments , fragments of pumice and volcanic glass , shale and siltstone , and of volcanic ejecta of earlier effusions . Petrographic characters of tuffaceous ...
Page 47
... fragment . Parallel nicols - X 35 Fig . 12 Lithic tuff with angular fragments of basalt in calcareous and Zeolitic matrix . Parallel nicols - X 35 Fig . 14 Core of volcanic breccia exhibiting presence of. 21 Geol . Surv . Ind . ]
... fragment . Parallel nicols - X 35 Fig . 12 Lithic tuff with angular fragments of basalt in calcareous and Zeolitic matrix . Parallel nicols - X 35 Fig . 14 Core of volcanic breccia exhibiting presence of. 21 Geol . Surv . Ind . ]
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