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 20
... minerals . on whether these garlands actually are veins in the plagio- criteria ( Vance , 1962 ) most of the twins are secondary , i.e. , clase ; they appear to be inclusions . • Quartz grains are xenoblastic and show strained ...
... minerals . on whether these garlands actually are veins in the plagio- criteria ( Vance , 1962 ) most of the twins are secondary , i.e. , clase ; they appear to be inclusions . • Quartz grains are xenoblastic and show strained ...
Page 28
... minerals , occurring together in composite spots ; the tremolite also has a tendency to be associated with these two minerals in the spots ( Fig . 31 ) . The zoisite has a patchy distri- bution . The opaque minerals are aligned parallel ...
... minerals , occurring together in composite spots ; the tremolite also has a tendency to be associated with these two minerals in the spots ( Fig . 31 ) . The zoisite has a patchy distri- bution . The opaque minerals are aligned parallel ...
Page 35
... minerals recognised as such , either with alteration rims.or without . ( 2 ) Primary pyroxene and plagioclase ... Minerals The metadolerite south of the Mylliem Pluton shows laths of relict plagioclase ; it has a maximum extinction angle ...
... minerals recognised as such , either with alteration rims.or without . ( 2 ) Primary pyroxene and plagioclase ... Minerals The metadolerite south of the Mylliem Pluton shows laths of relict plagioclase ; it has a maximum extinction angle ...
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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