Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 45
... flows are frequently traversed by later dykes which also have simi- lar mineral composition . The lava flows show dips upto 30 ° in all directions . In the Narcondam island volcano the summit is represented by three hummocks . The rocks ...
... flows are frequently traversed by later dykes which also have simi- lar mineral composition . The lava flows show dips upto 30 ° in all directions . In the Narcondam island volcano the summit is represented by three hummocks . The rocks ...
Page 45
... flows are frequently traversed by later dykes which also have simi- lar mineral composition . The lava flows show dips upto 30 ° in all directions . In the Narcondam island volcano the summit is represented by three hummocks . The rocks ...
... flows are frequently traversed by later dykes which also have simi- lar mineral composition . The lava flows show dips upto 30 ° in all directions . In the Narcondam island volcano the summit is represented by three hummocks . The rocks ...
Page 87
... flows with interbanded Deccan Trap pyroclastic and epiclastic deposits Geological Structures The area apparently presents a simple structural picture with almost flat lying layers of basaltic flows covering a surface area of vast ...
... flows with interbanded Deccan Trap pyroclastic and epiclastic deposits Geological Structures The area apparently presents a simple structural picture with almost flat lying layers of basaltic flows covering a surface area of vast ...
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