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 4
... considered older than the por- phyritic granite , but the age of the Sylhet Trap interpreted as older than the granite was not correct . ( 11 ) The contact between , the Sylhet Trap and the metamorphics was tentatively considered a ...
... considered older than the por- phyritic granite , but the age of the Sylhet Trap interpreted as older than the granite was not correct . ( 11 ) The contact between , the Sylhet Trap and the metamorphics was tentatively considered a ...
Page 19
Geological Survey of India. Accordingly , the Tyrnai assemblage may be considered to correspond to a facies - series of " low - pressure inter- mediate type " ( Miyashiro , 1961 ; Hietanen , 1967 ) . augen While discussing ...
Geological Survey of India. Accordingly , the Tyrnai assemblage may be considered to correspond to a facies - series of " low - pressure inter- mediate type " ( Miyashiro , 1961 ; Hietanen , 1967 ) . augen While discussing ...
Page 96
... considered as ( Mahroni ) schists older than the granite in age by almost all previous workers with that of foliation in the enclosing granites ( Table IV ) show major diversities , and thus it could be concluded that the granites have ...
... considered as ( Mahroni ) schists older than the granite in age by almost all previous workers with that of foliation in the enclosing granites ( Table IV ) show major diversities , and thus it could be concluded that the granites have ...
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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