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The Holocene
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Timing and climatic controls over Neoglacial expansion in the northern Coast Mountains, British Columbia, Canada

Scott F. Lamoureux

Department of Geography, Queen's University, Kingston ON K7L 3N6, Canada lamoureux{at}lake.geog.queensu.ca

Jaclyn M.H. Cockburn

Department of Geography, Queen's University, Kingston ON K7L 3N6, Canada

Holocene sedimentary records from two lakes in White Pass, British Columbia, show that the onset of Neoglacial sedimentation began c. 2 ka cal. BP. Prior to this time, the lakes accumulated organicrich sediments, with properties and sedimentation rates similar to adjacent lakes that have not had glacial influences during the Holocene. Neoglaciation at White Pass was coincident with the increased delivery of exotic Tsuga heterophylla (western hemlock) pollen. These results, together with regional indications for increased delivery of hemlock pollen at 2 ka BP by a deepened low pressure in the northeastern Pacific Ocean, suggest that increased moisture was important for the expansion of glaciers in the region in addition to longer-term late Holocene cooling.

Key Words: Glaciation • Neoglaciation • precipitation • moisture • British Columbia • Alaska

The Holocene, Vol. 15, No. 4, 619-624 (2005)
DOI: 10.1191/0959683605hl837rr
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L. Anderson, M. B. Abbott, B. P. Finney, and M. E. Edwards
Palaeohydrology of the Southwest Yukon Territory, Canada, based on multiproxy analyses of lake sediment cores from a depth transect
The Holocene, December 1, 2005; 15(8): 1172 - 1183.
[Abstract] [PDF]