Palaeoecology of the marine Pleistocene faunas of southwestern British Columbia

Wagner, F J E

doi:10.4095/100572

Cited by 12 publications

(19 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wagner (1970) analyzed extensive collections and concluded that the Champlain Sea did not attain normal salinities even in its central basin. Relatively high salinities of >20 per mil were associated with deep water areas where Portlandia arctica lived.…”

Section: Late Wisconsinan and Holocenementioning

confidence: 99%

“…These and other studies outlined the distributions of common molluscs (Bousfield, 1960;Macpherson, 1971;Bernard, 1979;Lubinsky, 1980;Smith, 1981;Wagner, 1984). More recent surveys include those of Clarke (1974) and Syvitski et al (1989) in Baffin Bay, Wagner (1975) Quantitative studies of cold-water molluscs are few because of limited accessibility. This constrains understanding of modern molluscan ecology and zoogeography and limits our ability to draw generalizations from the fossil record.…”

Section: Arctic Molluscsmentioning

confidence: 99%

“…Champlain Sea molluscs are the best studied in Canada, with a history of investigation that dates back to 1837 (Bayfield, 1837;Lyell, 1841;Wagner, 1970;Elson, 1969a, b;Hillaire-Marcel, 1980;Rodrigues, 1987;Rodrigues and Richard, 1983. Wagner (1970) analyzed extensive collections and concluded that the Champlain Sea did not attain normal salinities even in its central basin.…”

Section: Late Wisconsinan and Holocenementioning

confidence: 99%

“…Careful early inventories of fossils were made by Dawson (1893), Laursen (1950), and Richards (1962;reporting work mainly before 1950). Systematic inventories for several arctic regions by Wagner (1969and in Craig, 1960, 1961 and her survey of Champlain Sea fossils (Wagner, 1970) had limited radiocarbon support. Similarly, the treatment of marine Pleistocene faunas of southwestern British Columbia by Wagner (1959) is not supported by radiocarbon dates, even though some were in hand (Armstrong, 1956;Fyles, 1963).…”

Section: Late Wisconsinan and Holocenementioning

confidence: 99%

“…Systematic inventories for several arctic regions by Wagner (1969and in Craig, 1960, 1961 and her survey of Champlain Sea fossils (Wagner, 1970) had limited radiocarbon support. Similarly, the treatment of marine Pleistocene faunas of southwestern British Columbia by Wagner (1959) is not supported by radiocarbon dates, even though some were in hand (Armstrong, 1956;Fyles, 1963). Bousfield and Thomas (1975) interpreted the disjunct nature of shallow-water molluscan and crustacean faunas between Labrador and southern New England in terms of possible postglacial migrations.…”

Section: Late Wisconsinan and Holocenementioning

confidence: 99%

See 4 more Smart Citations

Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years

Dyke¹,

Dale²,

McNeely³

2007

gpq

116

View full text Add to dashboard Cite

ABSTRACTDated mollusc collections are classified in assemblages to map paleo-faunistic zones. Hiatella arctica and Mya truncata account for almost half the records and comprise a restricted arctic assemblage. Arctic assemblages comprise 70% and arctic-dominated assemblages 80% of the database. Fifteen species dominate but 170 taxa are recorded. At last glacial maximum, the arctic zone extended from the Arctic Ocean to the Grand Banks. The boreal zone in the western Atlantic was compressed. The subarctic zone, which today dominates eastern Canada, was small. The boreal zone was extensive in the eastern Pacific where subarctic and arctic zones were compressed. Zones shifted northward during deglaciation and the arctic zone diversified when Bering Strait submerged 10.5-10.3 ka BP. Western Arctic molluscs during Younger Dryas time indicate shallow waters warmer than present. Major North Atlantic currents were established 9.5-9.0 ka BP. The subarctic zone extended to the head of Baffin Bay and a boreal zone became established in West Greenland 9-8 ka BP, with intensive changes about 8.5 ka BP. We relate the latter to the reduction of Mackenzie River discharge and in sea ice export to the North Atlantic as Laurentide ice withdrew from Mackenzie headwaters. The extended subarctic zone in Baffin Bay persisted until 3 ka BP and then retreated about 1000 km on the Canadian side. Boreal-subarctic molluscs in the Gulf of St. Lawrence before 9.5 ka BP derived from the glacial refugium. High boreal-subarctic molluscs farther north probably migrated from Europe. We postulate that the Labrador Current acts as a one-way valve for mollusc migrations at glacial-interglacial scales.

show abstract

Section: Late Wisconsinan and Holocenementioning

confidence: 99%

Section: Arctic Molluscsmentioning

confidence: 99%

Section: Late Wisconsinan and Holocenementioning

confidence: 99%

Section: Late Wisconsinan and Holocenementioning

confidence: 99%

Section: Late Wisconsinan and Holocenementioning

confidence: 99%

See 3 more Smart Citations

Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years

Dyke¹,

Dale²,

McNeely³

2007

gpq

116

View full text Add to dashboard Cite

show abstract

Paleoecology of Late Pleistocene Glacial-Marine Sediments in Northwestern Washington and Southwestern British Columbia

Balzarini

1983

Glacial-Marine Sedimentation

View full text Add to dashboard Cite

Paleoecology of Marine Foraminifera in the Pluvial Estancia Valley, Central New Mexico

Bachhuber

McClellan

1977

Quat. res.

View full text Add to dashboard Cite

Two species of marine Foraminifera have been identified in the Quaternary pluvial sequence of the Estancia Valley, central New Mexico. Besides being an unusual occurrence of marine organisms in an inland body of water remote from the marine environment, the Foraminifera yield useful paleolimnological and paleoclimatological information about two major late Wisconsin pluvial lakes. In addition, the geographic location of the Estancia Valley relative to the closest marine environment requires foraminiferal introduction by avian means. Paleontologic evidence verifies the freshwater nature of the pluvial maxima of Late Lake Estancia (18,000-10,500 BP) and Lake Willard (8500-6000 BP) but early lake conditions were considerably different. The occurrence of foraminifers Cribroelphidium selseyense and Protelphidium orbiculare, both extant species, in the sediments from the early part of each pluvial stand indicates that initial lake development was characterized by a salinity range of 25 to 35‰. At these times lake depth approximated 6 m. By comparison, the freshwater maximum of Late Lake Estancia attained a minimum depth of 90 m. The modern holarctic distribution of the Foraminifera could suggest a mean August lake temperature of 10°C during the developmental stages of Late Lake Estancia and Lake Willard. Because of the shallow-water nature of the lake basins it is likely that this temperature was reflective of mean August air temperature. Therefore, a lowering of mean August air temperature of 9.7°C from that of the present is possible.

show abstract

Palaeoecology of the marine Pleistocene faunas of southwestern British Columbia

Cited by 12 publications

References 0 publications

Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years

Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years

Paleoecology of Late Pleistocene Glacial-Marine Sediments in Northwestern Washington and Southwestern British Columbia

Paleoecology of Marine Foraminifera in the Pluvial Estancia Valley, Central New Mexico

Contact Info

Product

Resources

About