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- Saint_Lawrence_rift_system abstract "The Saint Lawrence rift system is a seismically active zone paralleling the Saint Lawrence River. The rift system trends northeast and southwest and forms a half-graben that links the Ottawa-Bonnechere and the Saguenay grabens. The rift system extends more than 1000 km along the Saint Lawrence valley from the Ottawa - Montreal area. Within the system, fault reactivation is believed to occur along late Proterozoic to early Paleozoic normal faults related to the opening of the Iapetus Ocean.Two significant historically active seismic zones occur along this system associated with northwest trending intersecting graben structures. The Charlevoix region has been the location of at least five magnitude six or larger earthquakes over the last 350 years, including the 1925 Charlevoix-Kamouraska earthquake. At the Lower St Lawrence zone the largest recorded earthquakes are about magnitude five. Seismic studies indicate a crustal convergence across the Saint Lawrence valley of about 0.5 mm per year.The earthquakes of the Charlevoix Seismic Zone are thought to be related to the re-activation of ancient fault structures by the Charlevoix impact event.".
- Saint_Lawrence_rift_system wikiPageID "11870517".
- Saint_Lawrence_rift_system wikiPageRevisionID "526428141".
- Saint_Lawrence_rift_system hasPhotoCollection Saint_Lawrence_rift_system.
- Saint_Lawrence_rift_system subject Category:Geology_of_Quebec.
- Saint_Lawrence_rift_system subject Category:Plate_tectonics.
- Saint_Lawrence_rift_system subject Category:Rift_valleys.
- Saint_Lawrence_rift_system subject Category:Seismic_faults_of_Canada.
- Saint_Lawrence_rift_system subject Category:Structural_geology.
- Saint_Lawrence_rift_system type GeologicalFormation109287968.
- Saint_Lawrence_rift_system type NaturalDepression109366017.
- Saint_Lawrence_rift_system type Object100002684.
- Saint_Lawrence_rift_system type PhysicalEntity100001930.
- Saint_Lawrence_rift_system type RiftValley109410224.
- Saint_Lawrence_rift_system type RiftValleys.
- Saint_Lawrence_rift_system type Valley109468604.
- Saint_Lawrence_rift_system type YagoGeoEntity.
- Saint_Lawrence_rift_system type YagoPermanentlyLocatedEntity.
- Saint_Lawrence_rift_system comment "The Saint Lawrence rift system is a seismically active zone paralleling the Saint Lawrence River. The rift system trends northeast and southwest and forms a half-graben that links the Ottawa-Bonnechere and the Saguenay grabens. The rift system extends more than 1000 km along the Saint Lawrence valley from the Ottawa - Montreal area.".
- Saint_Lawrence_rift_system label "Saint Lawrence rift system".
- Saint_Lawrence_rift_system sameAs m.02rw8n5.
- Saint_Lawrence_rift_system sameAs Q7401636.
- Saint_Lawrence_rift_system sameAs Q7401636.
- Saint_Lawrence_rift_system sameAs Saint_Lawrence_rift_system.
- Saint_Lawrence_rift_system wasDerivedFrom Saint_Lawrence_rift_system?oldid=526428141.
- Saint_Lawrence_rift_system isPrimaryTopicOf Saint_Lawrence_rift_system.