Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 14
... zone of Syringothyris lydekkeri and an upper zone of Syringothyris nagmargensis Mid . and Bion . The lower is similar to Fenestella beds and is considered to belong to the Moscovian or the Middle Carboniferous and the upper is assigned ...
... zone of Syringothyris lydekkeri and an upper zone of Syringothyris nagmargensis Mid . and Bion . The lower is similar to Fenestella beds and is considered to belong to the Moscovian or the Middle Carboniferous and the upper is assigned ...
Page 41
... zones in the ultrabasic rocks . Although the zones have not been mapped , in general , basicity increases towards the centre and decreases towards the periphery . The zones are : ( 1 ) Peridotite - forms the central zone . Olivine ...
... zones in the ultrabasic rocks . Although the zones have not been mapped , in general , basicity increases towards the centre and decreases towards the periphery . The zones are : ( 1 ) Peridotite - forms the central zone . Olivine ...
Page 88
... zone with very closely spaced joint planes usually a centimetre or even less apart . These joints are almost always ... zone , 456 m . to 477 m . from the tunnel mouth , collapsed making a circular depression on the surface revealing ...
... zone with very closely spaced joint planes usually a centimetre or even less apart . These joints are almost always ... zone , 456 m . to 477 m . from the tunnel mouth , collapsed making a circular depression on the surface revealing ...
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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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