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TitleLate glacial and Holocene sedimentation and investigation of fiord tsunami potential in lower Howe Sound, British Columbia
AuthorJackson, L E, Jr.; Blais-Stevens, AORCID logo; Hermanns, R L; Jermyn, C E
SourceEngineering geology for society and territory - volume 4: marine and coastal processes; by Lollino, G (ed.); Manconi, A (ed.); Locat, J (ed.); Huang, Y (ed.); Canals Artigas, M (ed.); 2014 p. 59-62, 12
Alt SeriesEarth Sciences Sector, Contribution Series 20140483
PublisherSpringer International Publishing
Mediapaper; digital; on-line
File formatpdf
ProvinceBritish Columbia
NTS92G/06; 92G/12
AreaHowe Sound
Lat/Long WENS-123.5000 -123.0000 49.7500 49.2500
Subjectssurficial geology/geomorphology; tectonics; geophysics; Holocene; glacial history; glacial deposits; tectonic history; tectonic setting; earthquake risk; slope failures; landslides; debris flows; physiography; fluvial deposits; tsunami; shorelines; shoreline changes; coastal environment; coastal erosion; coastal studies; geophysical surveys; bathymetry; acoustic surveys; acoustic surveys, marine; topography; Quaternary; Cenozoic
Illustrationslocation maps; photographs; profiles; tables; logs
ProgramPublic Safety Geoscience Marine Geohazards
Released2014 01 01; 2018 05 01
AbstractPreliminary investigation of the history of sedimentation in lower Howe Sound fjord near Vancouver, B.C. indicates that no rock slide capable of generating a destructive displacement wave has occurred during the latter half of the Holocene. Possible rock slide run-out deposits were detected along the western margin of Bowen Island. These could date from any time during the Holocene. Investigation of the adjacent slope suggests it is creeping and is not an imminent large rock slide failure.
Summary(Plain Language Summary, not published)
Evidence of past fast moving landslides along the west side of Bowen Island, BC was investigated. Bowen Island is situated within Howe Sound, the southernmost fiord on the western mainland of Canada. Such landslides can cause tsunami-like waves that could pose a hazard to nearby coastal areas of Howe Sound. The western margin of Bowen Island does not appear to be in danger of a failing as a large landslide at present. The results of the investigation of the sediments underlying the sea bottom of Howe Sound suggest that no large landslides with the potential to generate fiord-tsunamis have entered Howe Sound over the past 4000 years.

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