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 86
... tion . The tearing apart of the schist band has taken place essentially due to shearing , that induced the differential movement of the migmatitic com- ponents . Three generations of folding have been recognised in the area . The ...
... tion . The tearing apart of the schist band has taken place essentially due to shearing , that induced the differential movement of the migmatitic com- ponents . Three generations of folding have been recognised in the area . The ...
Page 33
... tion of a centimetre to a few metres . The phyllite and banded magnetite quartzite rocks are intimately interbanded ... tion attitude of phyllite and schist are generally concordant , having NNW - SSE to NW - SE direc⚫ tion with gentle ...
... tion of a centimetre to a few metres . The phyllite and banded magnetite quartzite rocks are intimately interbanded ... tion attitude of phyllite and schist are generally concordant , having NNW - SSE to NW - SE direc⚫ tion with gentle ...
Page 65
... tion of plagioclase and clinopyroxene - rich frac- tion , when the geothermal gradient was steep at the sites of emplacement ( syn or early kine . matic ) , and the deep seated crystallisation of the ultramafic members , explain the ...
... tion of plagioclase and clinopyroxene - rich frac- tion , when the geothermal gradient was steep at the sites of emplacement ( syn or early kine . matic ) , and the deep seated crystallisation of the ultramafic members , explain the ...
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 |
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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