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 39
... rocks and the structural effects on these rocks have been approximately a function of this map angle , as described below . From Lyngkhoi to Lyngiong the granite has forced the rocks of the Shillong Group at the very contact into ...
... rocks and the structural effects on these rocks have been approximately a function of this map angle , as described below . From Lyngkhoi to Lyngiong the granite has forced the rocks of the Shillong Group at the very contact into ...
Page 87
... rocks between two adjacent bands is usually about 50 m but it could be as little as 10 m ( Fig . 30 ) . Swarms of outcrops , 10 m to 30 m apart are seen in the area bounded by Agori in the northwest , Ramgarha to the southeast , Jhankar ...
... rocks between two adjacent bands is usually about 50 m but it could be as little as 10 m ( Fig . 30 ) . Swarms of outcrops , 10 m to 30 m apart are seen in the area bounded by Agori in the northwest , Ramgarha to the southeast , Jhankar ...
Page 90
... rocks which otherwise mineralogically resemble a metamorphosed psammopelitic rock . As already indi- cated , granites bordering the quartz - sericite rocks exhibit , under microscope , later introduction of sericite only along the ...
... rocks which otherwise mineralogically resemble a metamorphosed psammopelitic rock . As already indi- cated , granites bordering the quartz - sericite rocks exhibit , under microscope , later introduction of sericite only along the ...
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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