Late Pleistocene chronology and environment of the ice-free corridor in northwestern Alberta

Auteurs :
WHITE, J. M.
MATHEWES, R. W.
MATHEWS, W. H.

Description :
Pollen and macrofossil analyses of two radiocarbon dated lake sediment cores in the upper Peace River district were used to investigate the controversial late-glacial geochronology of the ice-free corridor between the Laurentide and Cordilleran ice masses. The data support occlusion or near occlusion of Laurentide and Cordilleran ice in the Peace River area during the late Wisconsin. The sediment record began around 12,000 yr BP in the ice-damned and enlarged Boune Lake. An initially open, sedge-dominated cover was invaded by sage, willow, grass, and poplar by 11,700 yr BP, suggesting that a habitable landscape has existed in the area for at least 12 millennia.


Type de document :
Article de périodique

Source :
Quaternary research New York, 1985, vol. 24, n°. 2, p. 173-186, Références bibliographiques : 42 réf.

Date :
1985