Records of the Geological Survey of India, Volume 117, Part 2The Survey, 1986 - 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 26
... textural maturity is not forthcoming . The absence of textural maturity would imply the lack of recycling and long transport ; the virtual absence of felds- pars and biotite from the sandstones and quartzites would suggest that some of ...
... textural maturity is not forthcoming . The absence of textural maturity would imply the lack of recycling and long transport ; the virtual absence of felds- pars and biotite from the sandstones and quartzites would suggest that some of ...
Page 35
... textural pattern is retained . The following stages in textural reorganisation are marked : - ( 1 ) Primary minerals recognised as such , either with alteration rims.or without . ( 2 ) Primary pyroxene and plagioclase demolished ...
... textural pattern is retained . The following stages in textural reorganisation are marked : - ( 1 ) Primary minerals recognised as such , either with alteration rims.or without . ( 2 ) Primary pyroxene and plagioclase demolished ...
Page 45
... textural evolution from spotty dioritic rocks . The megacrysts with their overgrowth rims appear to be somewhat later than the groundmass ; the variable composition of the plagioclase megacrysts and the presence of oscillatory zones in ...
... textural evolution from spotty dioritic rocks . The megacrysts with their overgrowth rims appear to be somewhat later than the groundmass ; the variable composition of the plagioclase megacrysts and the presence of oscillatory zones in ...
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Common terms and phrases
albite amphibolite amphibolite facies aureole Babina banded iron-formation Basu Batholith Berwar Bijawar biotite bodies Bundelkhand Bundelkhand granitic massif Bundelkhand massif chlorite composition conglomerate country rocks crystals developed dips dolerite dykes emplacement enclaves esmeraldite exhibit feature feldspar folds foliation formation garnet Geol GEOLOGICAL SURVEY gneisses Gneissic Complex grade grained granite granite granitic rocks granitoid groundmass H₂O hornblende inclusions INDIA Records indicate intrusive Jhansi granite Jhararghat K-feldspar Kabrai Karesra Karitoran lamellae leucogranite magmatic magnetite Mahroni mapped Mau Ranipur megacrysts metabasic metamorphism microcline migmatites minerals muscovite Mylliem Mylliem Pluton myrmekite occur outcrops parallel pegmatite perthite phenocrysts plagioclase pluton porphyritic porphyritic coarse grained porphyritic granites Precambrian pyrophyllite quartz quartz reefs quartz-sericite rock quartzites recrystallization relict samples schist schistose sedimentary sediments sericite shear Shillong Group Shillong rocks Shillong Series South Khasi Batholith sphene strike structural suggest SURVEY OF INDIA syenitic textural trending twins upto veins xenoliths zone