CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Bourgeois, J.C.
Date : 1986
Title : A pollen record from the Agassiz Ice Cap, northern Ellesmere Island, Canada.
Publication : Boreas
Issue : 15(4):
Page(s) : 345-354.
Abstract
A continuous pollen record from the last glacial period to 100 B.P. was obtained from an ice core drilled in 1977 near the top of the Agassiz Ice Cap. The very low concentrations during the Wisconsinan glacial period and the early Holocene are attributed to the increased distance of potential sources as most of northern North America was ice-covered or supported tundra vegetation. An increase of exotic grains (mainly birch and alder) at c. 7,600 BP. corresponds to the period of alder migration into the Low Arctic regions. Regional pollen concentrations start to increase at c. 6,100 B.P. and a maximum concentration is reached at c. 3,100 B.P. The pollen record suggests that plant migration into northern Ellesmere was limited until 6,100 B.P., then increased gradually and continued to do so for about 1,000 years after the climate had started to deteriorate at about 4,000 B.P.
Bibliography of Canadian Geomorphology