Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 33
... sediments of the Andaman and Nicobar islands are represented by two different sedimentary cycles . Both the sequences are at present metamorphosed to low grades . The earlier sequence of open pelagic sediments are described here as the ...
... sediments of the Andaman and Nicobar islands are represented by two different sedimentary cycles . Both the sequences are at present metamorphosed to low grades . The earlier sequence of open pelagic sediments are described here as the ...
Page 61
... sediments in this basin are predominantly hemipelagic silty clays of deltaic origin , and , the island derived sedi- ment consists of rare calc - arenites . The Andaman basin receives sediments from the Irrawaddy river , that is from ...
... sediments in this basin are predominantly hemipelagic silty clays of deltaic origin , and , the island derived sedi- ment consists of rare calc - arenites . The Andaman basin receives sediments from the Irrawaddy river , that is from ...
Page 62
... sediments . The second cycle of flysch sediments are thickest at the southern side and gradual- ly thin out to the north . It is apparent from the distribution of the various types ( and periods ) of sediments that there has been a ...
... sediments . The second cycle of flysch sediments are thickest at the southern side and gradual- ly thin out to the north . It is apparent from the distribution of the various types ( and periods ) of sediments that there has been a ...
Contents
CONTENTS | 2 |
The Geology and Mineral Resources of the Andaman | 25 |
Geology of the Coal Measures in the Deccan Trap region | 69 |
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Common terms and phrases
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