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 19
... Metamorphism The most striking feature of the entire group is the abundance of granitoid material in all scales . This may result from culmination of metamorphism under a variety of geothermal gradients . In order to arrive at an ...
... Metamorphism The most striking feature of the entire group is the abundance of granitoid material in all scales . This may result from culmination of metamorphism under a variety of geothermal gradients . In order to arrive at an ...
Page 27
... metamorphic reconstitution can be recognised in these rocks ; first , cataclastic metamorphism without the development of index minerals other than sericite - muscovite , and secondly , metamorphism of regional aspect . They have ...
... metamorphic reconstitution can be recognised in these rocks ; first , cataclastic metamorphism without the development of index minerals other than sericite - muscovite , and secondly , metamorphism of regional aspect . They have ...
Page 31
... metamorphism have rather striking characteristics . Andalusite has long been known as a product of contact metamorphism but may also be generated in regional metamorphism of a low - pressure type . Chloritoid , almandine and staurolite ...
... metamorphism have rather striking characteristics . Andalusite has long been known as a product of contact metamorphism but may also be generated in regional metamorphism of a low - pressure type . Chloritoid , almandine and staurolite ...
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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