Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 38
... developed ) in the phyllites have low ( 12 ° ) plunge towards S50 ° E , which suggests their development due to the later major fold . Small scale block faults are present within the formation . Mylonites have developed along the ...
... developed ) in the phyllites have low ( 12 ° ) plunge towards S50 ° E , which suggests their development due to the later major fold . Small scale block faults are present within the formation . Mylonites have developed along the ...
Page 52
... developed . Convolute and involutes are noticed only when graded character is not developed , that is , individual unit in this case shows large volumes of silty and clayey portions . ( 4 ) Glided sheets , locally well developed on ...
... developed . Convolute and involutes are noticed only when graded character is not developed , that is , individual unit in this case shows large volumes of silty and clayey portions . ( 4 ) Glided sheets , locally well developed on ...
Page 106
foliation developed in the anorthosites . At places the gabbroic bands are so small that they give the impression of being caught - up patches within the anorthosites . The contact between the two rock types is usually very sharp ...
foliation developed in the anorthosites . At places the gabbroic bands are so small that they give the impression of being caught - up patches within the anorthosites . The contact between the two rock types is usually very sharp ...
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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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