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 32
Geological Survey of India. In the following paragraphs the evidences for the unconformity would first be set out ... evidence of superposition at the time of folding of the Shillong rocks . 1 Southwest from the Mawsalroh ridge the basar ...
Geological Survey of India. In the following paragraphs the evidences for the unconformity would first be set out ... evidence of superposition at the time of folding of the Shillong rocks . 1 Southwest from the Mawsalroh ridge the basar ...
Page 33
... evidences suggestive of primary growth of the K - feldspar have been summarised below : Inclusion of biotite - plagioclase - quartz rock surrounded by a rim of alkali feldspar . This is certainly a precipita- tion rim . It indicates ...
... evidences suggestive of primary growth of the K - feldspar have been summarised below : Inclusion of biotite - plagioclase - quartz rock surrounded by a rim of alkali feldspar . This is certainly a precipita- tion rim . It indicates ...
Page 47
... evidences suggestive of primary growth of the K - feldspar have been summarised below : Inclusion of biotite - plagioclase - quartz rock surrounded by a rim of alkali feldspar . This is certainly a precipita- tion rim . It indicates ...
... evidences suggestive of primary growth of the K - feldspar have been summarised below : Inclusion of biotite - plagioclase - quartz rock surrounded by a rim of alkali feldspar . This is certainly a precipita- tion rim . It indicates ...
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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