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 41
... Megacrysts Megacrysts of well shaped microcline dominate the texture ; on slightly weathered surfaces suggestions of zone structures are perceived , but this cannot be discerned in thin sections except very rarely . In thin section the ...
... Megacrysts Megacrysts of well shaped microcline dominate the texture ; on slightly weathered surfaces suggestions of zone structures are perceived , but this cannot be discerned in thin sections except very rarely . In thin section the ...
Page
... megacrysts : Well shaped mega- crysts of K - feldspar , a mineral so low in the crystallo- blastic series , would at first sight suggest that these grew in a liquid medium . ( Eskola , 1956 ; he also argued why the crystalloblastic ...
... megacrysts : Well shaped mega- crysts of K - feldspar , a mineral so low in the crystallo- blastic series , would at first sight suggest that these grew in a liquid medium . ( Eskola , 1956 ; he also argued why the crystalloblastic ...
Page 46
... megacrysts : Well shaped mega- crysts of K - feldspar , a mineral so low in the crystallo- blastic series , would at first sight suggest that these grew in a liquid medium . ( Eskola , 1956 ; he also argued why the crystalloblastic ...
... megacrysts : Well shaped mega- crysts of K - feldspar , a mineral so low in the crystallo- blastic series , would at first sight suggest that these grew in a liquid medium . ( Eskola , 1956 ; he also argued why the crystalloblastic ...
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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