Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 185
... phosphate and carbonate minerals also favours the idea of direct precipitation of phosphate minerals . Otherwise , such rhythmic layering even in thin laminations would become difficult to explain by phosphatisation theory . The partial ...
... phosphate and carbonate minerals also favours the idea of direct precipitation of phosphate minerals . Otherwise , such rhythmic layering even in thin laminations would become difficult to explain by phosphatisation theory . The partial ...
Page 191
... phosphate replacement . Pitting is also faintly recognisable , and the macerated residues show bordered pits as well . The fragmentation of the wood took place mainly along the medullary ray cell structures . Siliceous material ...
... phosphate replacement . Pitting is also faintly recognisable , and the macerated residues show bordered pits as well . The fragmentation of the wood took place mainly along the medullary ray cell structures . Siliceous material ...
Page 194
... phosphates . During the field - season 1963-64 in course of the field investiga- tions pertaining to the programme of search for indigenous rock- phosphates in this area , the author came across a rich fossiliferous horizon within the ...
... phosphates . During the field - season 1963-64 in course of the field investiga- tions pertaining to the programme of search for indigenous rock- phosphates in this area , the author came across a rich fossiliferous horizon within the ...
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