Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 75
... nature of the coalseams and their frequent interbanding with gray or carbonaceous shales . The post - Barakar and pre - Kamthi period is one of no deposition and is represented by the unconformable overlap of the older rocks by the ...
... nature of the coalseams and their frequent interbanding with gray or carbonaceous shales . The post - Barakar and pre - Kamthi period is one of no deposition and is represented by the unconformable overlap of the older rocks by the ...
Page 80
... nature of the overlap by the rocks of the Kamthi Series indicates considerable erosion prior to the deposition of the younger measures . This factor as also the nature of the basement for the deposition of the Lower Gondwana rocks ...
... nature of the overlap by the rocks of the Kamthi Series indicates considerable erosion prior to the deposition of the younger measures . This factor as also the nature of the basement for the deposition of the Lower Gondwana rocks ...
Page 124
... nature of the residual magma from which aegirine - augite , nepheline and biotite crys- tallised . Carbonate and cancrinite are apparently later stage minerals as they have replaced the nepheline . The close association of these ...
... nature of the residual magma from which aegirine - augite , nepheline and biotite crys- tallised . Carbonate and cancrinite are apparently later stage minerals as they have replaced the nepheline . The close association of these ...
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