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- W1972027109 abstract "The Saint-Lawrence Lowlands correspond to the Cambrian–Early Ordovician passive margin of the Iapetus Ocean, overlain by Ordovician deposits of the Appalachian foreland. A structural and palaeostress study of this platform near Quebec City allowed reconstructing its tectonic evolution since the Palaeozoic. The collapse of the Iapetus margin (NW–SE extension) has induced N040 normal faults. Appalachian compressions (WNW and north–south) have reactivated these border faults, and induced strike-slip faults trending N090 and N140. During the Mesozoic, NNE to NNW extensions have reactivated N090 and N040 faults. The following NE–SW compression has been active until today. Les Basses-Terres du Saint-Laurent constituent la marge passive cambro-ordovicienne de l'océan Iapetus, recouverte par des sédiments de l'Ordovicien moyen–supérieur de l'avant-pays Appalachien. Une analyse tectonique et structurale de cette plate-forme dans la région de Québec a permis de reconstituer son histoire depuis le Paléozoı̈que. L'écroulement de la marge de Iapetus (extension NW–SE) a engendré des failles normales N040. Les compressions appalachiennes (WNW et nord–sud) ont fait rejouer ces failles bordières et engendré des décrochements N090 et N140. Au Mésozoı̈que, des extensions NNE à NNW ont réactivé les failles N090 et N040. Une compression NE–SW s'est poursuivie ensuite jusqu'à nos jours." @default.
- W1972027109 created "2016-06-24" @default.
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- W1972027109 date "2001-08-01" @default.
- W1972027109 modified "2023-10-16" @default.
- W1972027109 title "L'effondrement de la plate-forme du Saint-Laurent : ouverture de Iapetus ou de l'Atlantique ? Apport de la reconstitution des paléocontraintes dans la région de Québec (Canada)" @default.
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- W1972027109 doi "https://doi.org/10.1016/s1251-8050(01)01610-x" @default.
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