Records of the Geological Survey of India, Volume 112, Part 8The Survey, 1977 - 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 10
... felspar phenocrysts in a groundmass of dark colour . The felspars are sometimes orbicular and show rapakivi texture . Towards south , it be- comes fine - grained and its quartz content increases . Under the microscope the rock contains ...
... felspar phenocrysts in a groundmass of dark colour . The felspars are sometimes orbicular and show rapakivi texture . Towards south , it be- comes fine - grained and its quartz content increases . Under the microscope the rock contains ...
Page 30
... Felspars are of two genera- tions , the earlier one showing more alteration than the younger - generation - felspar . They have corroded boundaries . The orbicular shape of felspars with the corroded boundaries may indicate that these ...
... Felspars are of two genera- tions , the earlier one showing more alteration than the younger - generation - felspar . They have corroded boundaries . The orbicular shape of felspars with the corroded boundaries may indicate that these ...
Page 79
... felspar and quartz . Tourmaline , apatite , cordierite and epidote occur as accessory minerals . WAZRI CRYSTALLINE FORMATION The Wazri crystalline unit comprises a sequence of low to medium grade metamorphites exposed in the area north ...
... felspar and quartz . Tourmaline , apatite , cordierite and epidote occur as accessory minerals . WAZRI CRYSTALLINE FORMATION The Wazri crystalline unit comprises a sequence of low to medium grade metamorphites exposed in the area north ...
Contents
RECORDS | 1 |
Geology Structure and Sulphide Mineralisation of Tosham District Bhiwani Haryana | 7 |
Geology and Geochemistry of Sulphide Mineralisation in Teejanwali Hill Mahendragarh | 17 |
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anomaly bands basin Bhander biotite calcareous Chail chemical comprises conglomerate Deoban belt Deoban Group depth Dharamsala Dharmigad district dunite dykes exposed fault fauna felspar folds foliation geochemical Geol Geological Survey Giri glacial glacier gneiss granite grey groundmass Haryana Himalaya ignimbrites Jamuna Jaunsar Jutogh Jutogh Thrust Kaimur Kallar kankar kankar deposits Kulu limestone Lower Main Central Thrust Mandhali Formation mapping metres mineralisation minerals Morar-Chakrata nala Narkasi Naugaon Nawagaon occur pebbles Permian phenocrysts phyllite plagioclase Plate-1 porphyroblastic porphyry Pradesh quartz quartzite Quaternary Raina Ramganga rhyolite river rocks Salnian samples sand Sandstone Sauli Formation schist schistose sediments sequence sericite Shale shear zone shelly bedded kankar silt siltstone Simla Siwalik slate slope soil Spiti stratigraphic structure Surv Survey of India Table-1 tectonic thickness tion Tiuni Tons valley Tosham hill Tr Tr trend tuff lavas Unpub Upper upto values Vindhyan volcanic Yamuna valley