Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 59
... structural and litho- logical superposition . The Archipelago group of rocks show north - south strike in general ... structures indicate that the Archipelago group of rocks were deposited under shallow marine condi- tions which were ...
... structural and litho- logical superposition . The Archipelago group of rocks show north - south strike in general ... structures indicate that the Archipelago group of rocks were deposited under shallow marine condi- tions which were ...
Page 184
... structures such as slump structures , pull -apart and tear - drop structures have also been reported from the phos- phorite horizon of this area ( Raha , 1971 ) . Chiphaldi area The phosphorite horizon of the Chiphaldi area unlike that ...
... structures such as slump structures , pull -apart and tear - drop structures have also been reported from the phos- phorite horizon of this area ( Raha , 1971 ) . Chiphaldi area The phosphorite horizon of the Chiphaldi area unlike that ...
Page 191
... structures appear deep brownish , anisotropic , and distorted . The softer parts were thus phosphatised , and the thick tube - like tracheids resisted phosphati- sation , being preserved in their original form . This process largely ...
... structures appear deep brownish , anisotropic , and distorted . The softer parts were thus phosphatised , and the thick tube - like tracheids resisted phosphati- sation , being preserved in their original form . This process largely ...
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