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Subaqueous mass movements in North America; diversity and issues

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Authors:Locat, Jacques
Author Affiliations:Primary:
Laval University, Department of Geology and Geological Engineering, Laboratoire d'études sur les risques naturels (LERN), Quebec City, QC, Canada
Other:
Kent State University, United States
Volume Title:Proceedings of the 3rd North American Symposium on landslides
Volume Authors:De Graff, Jerome V., prefacer; Shakoor, Abdul
Source:Special Publication - Association of Engineering Geologists, Vol.27, p.109-120; Proceedings of the 3rd North American symposium on landslides, Roanoke, VA, June 4-8, 2017, prefaced by Jerome V. De Graff and Abdul Shakoor. Publisher: Association of Engineering Geologists, Sudbury, MA, United States
Publication Date:2017
Note:In English. 78 refs.; illus., incl. 1 table, geol. sketch maps
Summary:Subaqueous mass movements can originate from the coast line to the deep sea and result from various phenomena, such that their volume can vary from a few thousand cubic meters to more than 1000 cubic kilometers. Processes leading to instabilities are mostly related to earthquakes, erosion, sediment loading, groundwater seepage, melting of gas hydrates, and even human activity. Managing subaqueous mass movements brings up issues about recognizing them and characterizing their geomechanical properties, often in conditions where it is difficult to carry out traditional geotechnical investigations. This review will show case examples of subaqueous slides using multibeam technology and will also provide a revised classification for these mass movements. Apart from some aspects specific to their environment, subaqueous mass movement are not so different from their on-land equivalent.
Subjects:Avalanches; Bathymetry; Classification; Coastal environment; Debris avalanches; Deep-sea environment; Earthquakes; Estuaries; Fjords; Glacial features; Lacustrine environment; Landslides; Marine environment; Mass movements; Multibeam methods; Review; Shore features; Slope stability; Slumping; Submarine environment; Alaska; Atlantic Ocean; California; Gulf of Mexico; Los Angeles California; Los Angeles County California; North Atlantic; Prince William Sound; United States; San Pedro Escarpment; Valdez
Coordinates:N180000 N300400 W0803000 W0980000
N334500 N344500 W1174000 W1185000
Record ID:801188-14
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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