Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 12
... occur as often above as they do below the Panjal Traps . Vihi District : On the Risin spur , the Lower Gondwana beds are composed largely of tuffs and occur between the Panjal Traps and the Zewan beds of the Lower and Middle Permian age ...
... occur as often above as they do below the Panjal Traps . Vihi District : On the Risin spur , the Lower Gondwana beds are composed largely of tuffs and occur between the Panjal Traps and the Zewan beds of the Lower and Middle Permian age ...
Page 102
... occur as narrow impersistent bands within the former and quartzofelspathic gneisses ( leptynites ) . Medium to fine grained , dark coloured two - pyroxene - granulites resembling ' basic charnockites ' in general appearance , texture ...
... occur as narrow impersistent bands within the former and quartzofelspathic gneisses ( leptynites ) . Medium to fine grained , dark coloured two - pyroxene - granulites resembling ' basic charnockites ' in general appearance , texture ...
Page 108
... occur in increased amounts , making up nearly 30 per cent of the rocks as against 0 to 5 per cent in the anorthosites . Both ortho and clinopyroxenes occur , the former dominating over the latter . Reddish brown biotite occurs as an ...
... occur in increased amounts , making up nearly 30 per cent of the rocks as against 0 to 5 per cent in the anorthosites . Both ortho and clinopyroxenes occur , the former dominating over the latter . Reddish brown biotite occurs as an ...
Contents
CONTENTS | 2 |
The Geology and Mineral Resources of the Andaman | 25 |
Geology of the Coal Measures in the Deccan Trap region | 69 |
Copyright | |
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80 mesh amphibolites analysed Andaman island anorthosites apatite bands Baraganda Baratang Baratang island basaltic basin beds Bihar biotite Bramlette and Riedel calc-granulite calcareous calcite carbonate Carboniferous charnockites chemical clay coal coalfield coalseams conglomerate copper deposition Discoaster district endothermic endothermic peak Eocene estherids fauna felspar figs folds foliation Formation fossil gabbro Gangamopteris garnetiferous geochemical Geol Geological Survey Geologist glacier gneisses Gondwana grained granitic gray anorthosites graywacke hill hornblende indicate khondalites limestone lodes Lower margins metadolerite metal Middle Andaman mineral mineralisation Mussoorie Nala Nicobar occur Orissa orthopyroxene oxides para-amphibolite Permian phenocrysts phosphate phosphorite pinnules plagioclase present pyroxene quartz quartzite rocks samples sandstone sedimentary sediments shales shear shows siltstone snout South Andaman Stradner strike length Surv Survey of India thickness Thinnfeldia tion tonnes trace element ultrabasic upto valley varies veins volcanic younger ortho-amphibolite Zemu glacier zone