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TitleImproved relative sea-level histories for Victoria and Vancouver, British Columbia, from isolation-basin coring
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AuthorJames, T S; Hutchinson, I; Clague, J J
SourceGeological Survey of Canada, Current Research (Online) no. 2002-A16, 2002, 7 pages, https://doi.org/10.4095/213083 (Open Access)
Image
Year2002
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediapaper; on-line; digital
RelatedThis publication is contained in Geological Survey of Canada; (2002). Current Research 2002, winter release, Geological Survey of Canada, Current Research no. 2002
File formatpdf
ProvinceBritish Columbia
NTS92G/02; 92G/03; 92G/06; 92G/07; 92B/06; 92B/11
AreaVictoria; Vancouver; Fraser Lowland
Lat/Long WENS-123.5000 -122.5000 49.5000 49.0000
Lat/Long WENS-123.5000 -123.0000 48.7500 48.5000
Subjectsmarine geology; hydrogeology; surficial geology/geomorphology; sea level changes; sea level fluctuations; salt water; surface waters; water levels; marine deposits; glaciomarine deposits; ice movement; isostatic rebound; Cenozoic
Illustrationssketch maps; plots
Released2002 01 22
AbstractFreshwater sediments in low-elevation lakes and bogs in southwestern British Columbia are commonly underlain by marine and glaciomarine deposits. Radiocarbon ages from the marine-freshwater transition define the time that basins became isolated from the sea. Data from five lakes and bogs in the Victoria area, combined with earlier results, indicate that sea level fell from above 60 m a.s.l. to below present sea level between 12 500 and 11 500 14 C years ago. In the Fraser Lowland, data from seven lakes and bogs show that sea level fell from above 180 m a.s.l. to about 80 m a.s.l. between 12 500 and 12 000 14 C years ago, to 20-30 m a.s.l. by 11 000 14C years ago, and to about 10 m a.s.l. by 10 000 14C years ago. A previously proposed secondary resubmergence of the Fraser Lowland of 100 m or more is ruled out by the radiocarbon ages and by diatom analyses.
GEOSCAN ID213083