scholarly journals Improved relative sea-level histories for Victoria and Vancouver, British Columbia, from isolation-basin coring

2002 ◽  
Author(s):  
T S James ◽  
I Hutchinson ◽  
J J Clague
Keyword(s):  
British Columbia ◽  
Sea Level ◽  
Relative Sea Level ◽  
Isolation Basin

A reconnaissance survey of late Quaternary sea levels, Bella Bella/Bella Coola region, central British Columbia coast

1978 ◽  
Vol 15 (3) ◽  
pp. 341-350 ◽  
Author(s):  
J. T. Andrews ◽  
R. M. Retherford
Keyword(s):  
British Columbia ◽  
Sea Level ◽  
Late Quaternary ◽  
Middle Part ◽  
Relative Sea Level ◽  
Marine Transgression ◽  
Sea Levels ◽  
Reconnaissance Survey ◽  
Rate Of Emergence ◽  
Bella Coola

A preliminary relative sea level curve that covers the last 10 200 years is derived for the area of the islands and outer mainland centered on Bella Bella and Namu, the central coast of British Columbia. The curve shows postglacial emergence of 17 m over this period. The rate of emergence was ~0.6 m/100 year about 9000 BP, and present sea level was attained between 7000 and 8000 BP. Relative sea level continued to fall until the last few hundred to one thousand years BP when a marine transgression led to a rise of sea level and resultant erosion of many coastal Indian middens. Marine limits on the outer islands may reach 120 m asl, whereas in the middle part of the fiord country observed delta surfaces are lower (54–75 m asl). Elevations of raised deltas then attain ~150 m at fiord heads. A readvance of the ice front ≤ 12 210 ± 330 BP (GSC-1351) is suggested by the stratigraphy of one section.

Relative sea-level change inferred from intertidal sediments beneath marshes on Vancouver Island, British Columbia

1999 ◽  
Vol 60 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Boyd E Benson ◽  
John J Clague ◽  
Kurt A Grimm
Keyword(s):  
British Columbia ◽  
Sea Level ◽  
Sea Level Change ◽  
Vancouver Island ◽  
Intertidal Sediments ◽  
Relative Sea Level ◽  
Level Change

Late Quaternary sea levels and crustal movements, coastal British Columbia

1982 ◽  
Vol 19 (3) ◽  
pp. 597-618 ◽  
Author(s):  
John Clague ◽  
John R. Harper ◽  
R. J. Hebda ◽  
D. E. Howes
Keyword(s):  
British Columbia ◽  
Sea Level ◽  
Late Holocene ◽  
Late Quaternary ◽  
Sea Level Change ◽  
Vancouver Island ◽  
Relative Sea Level ◽  
Crustal Movements ◽  
Level Change ◽  
Queen Charlotte Islands

Late Quaternary sea-level fluctuations on the British Columbia coast have been established from studies of terrestrial and marine sediments and landforms. These studies indicate that the sea-level history of mainland British Columbia and eastern Vancouver Island is very different from that of the Queen Charlotte Islands and western Vancouver Island. Specifically, in the former areas, there was a rapid rise of submerged coastal lowlands between about 13 000 and 10 000 years ago. Emergence culminated about 6000–9000 years ago, depending on the locality, when the sea, relative to the land, was 12 m or more lower than at present in some areas. During middle and late Holocene time, relative sea level rose on the mainland coast and at least locally on eastern Vancouver Island, resulting in inundation of coastal archaeological sites and low-lying terrestrial vegetation. Tidal records and precise levelling suggest ongoing submergence of at least part of this region.In contrast, shorelines on the Queen Charlotte Islands were below present from before 13 700 years ago until approximately 9500–10 000 years ago. A transgression at the close of the Pleistocene climaxed about 7500–8500 years ago when relative sea level probably was about 15 m above present in most areas. Most of the emergence that followed apparently occurred in the last 5000–6000 years. There has been a similar pattern of emergence on the west coast of Vancouver Island during late Holocene time.The above patterns of late Quaternary sea-level change are attributed to complex isostatic response to downwasting and retreat of the late Wisconsin Cordilleran Ice Sheet, to transfers of water from melting ice sheets to oceans, and to plate interactions on the British Columbia continental margin. Late Pleistocene and early Holocene crustal movements were dominantly isostatic. Although the recent regression on the outer coast likely is due, at least in part, to tectonic uplift, some late Holocene sea-level change in this area and elsewhere on the British Columbia coast may be either eustatic in nature or a residual isostatic response to deglaciation, which occurred thousands of years earlier.

Isolation basin records of late Quaternary sea-level change, central mainland British Columbia, Canada

2013 ◽  
Vol 310 ◽  
pp. 181-198 ◽  
Author(s):  
Helen M. Roe ◽  
Christine T. Doherty ◽  
R. Timothy Patterson ◽  
Glenn A. Milne
Keyword(s):  
British Columbia ◽  
Sea Level ◽  
Late Quaternary ◽  
Sea Level Change ◽  
Level Change ◽  
Isolation Basin

Early growth of the last Cordilleran ice sheet deduced from glacio-isostatic depression in southwest British Columbia, Canada

2005 ◽  
Vol 63 (1) ◽  
pp. 53-59 ◽  
Author(s):  
John J. Clague ◽  
Duane Froese ◽  
Ian Hutchinson ◽  
Thomas S. James ◽  
Karen M. Simon
Keyword(s):  
British Columbia ◽  
Sea Level ◽  
Initial Phase ◽  
Ice Sheet ◽  
Early Growth ◽  
Relative Sea Level ◽  
Strait Of Georgia ◽  
The Difference ◽  
Cordilleran Ice Sheet

Relative sea level at Vancouver, British Columbia rose from below the present datum about 30,000 cal yr B.P. to at least 18 m above sea level 28,000 cal yr B.P. In contrast, eustatic sea level in this interval was at least 85 m lower than at present. The difference in the local and eustatic sea-level positions is attributed to glacio-isostatic depression of the crust in the expanding forefield of the Cordilleran ice sheet during the initial phase of the Fraser Glaciation. Our findings suggest that about 1 km of ice was present in the northern Strait of Georgia 28,000 cal yr B.P., early during the Fraser Glaciation.

Postglacial relative sea-level history of the Prince Rupert area, British Columbia, Canada

2016 ◽  
Vol 153 ◽  
pp. 156-191 ◽  
Author(s):  
Bryn Letham ◽  
Andrew Martindale ◽  
Rebecca Macdonald ◽  
Eric Guiry ◽  
Jacob Jones ◽  
...  
Keyword(s):  
British Columbia ◽  
Sea Level ◽  
Relative Sea Level ◽  
History Of

Late Devensian and Holocene relative sea level and environmental changes from an isolation basin in southern Skye

2000 ◽  
Vol 36 (1) ◽  
pp. 73-86 ◽  
Author(s):  
Katherine A. Selby ◽  
David E. Smith ◽  
Alastair G. Dawson ◽  
Timothy M. Mighall
Keyword(s):  
Sea Level ◽  
Environmental Changes ◽  
Relative Sea Level ◽  
Isolation Basin
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