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 1
... regional metamorphism of a low pressure intermediate type post - dating still earlier tectonomagmatic cycles . The nonporphyritic granitoids are the migmatitic constituents of the entire gneissic belt ; they are harmo- nious with and ...
... regional metamorphism of a low pressure intermediate type post - dating still earlier tectonomagmatic cycles . The nonporphyritic granitoids are the migmatitic constituents of the entire gneissic belt ; they are harmo- nious with and ...
Page 5
... regional geology of the little known Khasi Hills in line with con- temporary concepts on evolution of orogenic belts , and to SCARPS , WEST OF UMRINA AND NORTH OF A DIENGIEL. the exact junction could not be made out though the two groups ...
... regional geology of the little known Khasi Hills in line with con- temporary concepts on evolution of orogenic belts , and to SCARPS , WEST OF UMRINA AND NORTH OF A DIENGIEL. the exact junction could not be made out though the two groups ...
Page 19
... Regional 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 ...
... Regional 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 ...
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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