Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 9
... shales in the Lidar valley . The lowest bed is unfossi- liferous , while the upper shales contain abundant Fenestella besides brachiopods , trilobites and lamellibranchs . The Fenestella shales are in several places conformably ...
... shales in the Lidar valley . The lowest bed is unfossi- liferous , while the upper shales contain abundant Fenestella besides brachiopods , trilobites and lamellibranchs . The Fenestella shales are in several places conformably ...
Page 50
... shales during the late Cretaceous continued uninterr- upted to the end of Oligocene . It was during Oligocene that these nonorganogenic eugeosynclinal turbidites flooded the basin . Primary sedimentary structures like cross laminations ...
... shales during the late Cretaceous continued uninterr- upted to the end of Oligocene . It was during Oligocene that these nonorganogenic eugeosynclinal turbidites flooded the basin . Primary sedimentary structures like cross laminations ...
Page 72
... shales , carbonaceous shales , fire - clay and coal seams . Their maximum thickness is 270 m . as inferred from drill hole data . The Barakar sequence , proved so far , shows development of the following three principal rock facies ...
... shales , carbonaceous shales , fire - clay and coal seams . Their maximum thickness is 270 m . as inferred from drill hole data . The Barakar sequence , proved so far , shows development of the following three principal rock facies ...
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