Abstract
The Pointe-du-Fort deposits have been previously interpreted as the result of a single sedimentation event triggered by the 1663 Ms ~7 Charlevoix earthquake. It has been proposed that these deposits represent the spread of a failed mass coming from the south fjord wall. This paper presents multibeam, seismic and CAT-scan imagery evidences revealing that the Pointe-du-Fort deposits are the result of a multiphase build-up which includes many episodes of erosion and sedimentation by debris flows. These processes were induced by bottom slope erosion caused by the passage of a major debris flow coming upstream from the surveyed area, which was previously triggered by the 1663 Ms ~7 earthquake.
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Duchesne, M.J., Long, B.F., Locat, P., Locat, J., Massé, M. (2003). The Pointe-Du-Fort Mass Movement Deposits, Upper Saguenay Fjord, Canada: A Multiphase Build-Up. In: Locat, J., Mienert, J., Boisvert, L. (eds) Submarine Mass Movements and Their Consequences. Advances in Natural and Technological Hazards Research, vol 19. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0093-2_55
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DOI: https://doi.org/10.1007/978-94-010-0093-2_55
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