CGRG Bibliography of Canadian Geomorphology
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Author : Cauchon-Voyer, G.; Locat, J.; St-Onge, G.; Godin, A.; and Sanfacon, R.
Date : 2005.
Title : A preliminary analysis of the submarine morpho-sedimentology of the Betsiamites - Rimouski area, St. Lawrence Estuary, Quebec, Canada.
Publication : Joint Meeting of the Geological Association of Canada, the Mineralogical Association of Canada, the Canadian Society of Petroleum Geologists and the Canadian Society of Soil Sciences. May 15-18, 2005. Studley Campus of Dalhousie University, Halifax, Nova Scotia.
Issue :
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Abstract
Studies of the seafloor of the St. Lawrence Estuary (Québec) between Betsiamites and Rimouski provides useful insight into submarine processes such as sediment instability and erosional and depositional mechanisms in this sector of the Estuary. Multibeam bathymetric and seismic reflection surveys conducted as part of COSTA-Canada project between 2001 and 2003 revealed the existence of complex submarine structures, formed by several types of depositional mechanisms, adjacent to the coastal sub-aerial Betsiamites slide. This sub-aerial landslide is linked to the 1663 earthquake (Bernatchez 2003) which also seems to have triggered a major submarine debris flow on the plateau. In this research we will describe the morpho-sedimentology of the various submarine features in order to establish a depositional sequence and erosional history of the sediments. The linkage between the sub-aerial landslide and the submarine mass movement signatures will also be investigated in order to identify a potential correlation between these events.
Bibliography of Canadian Geomorphology