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Lake Agassiz occupied large areas of the central Northern Great
during Wisconsinan deglaciation, reaching a maximum area of about 260,000 km2 and a volume of about 22,700 km3 (Leverington et al.,2000). The size and extent of Lake Agassiz varied considerably
- in response to changes in the ice sheet's size and configuration,
and
- as a consequence of the opening and closing of topographically
controlled drainage outlets.
The lake covered more than 100,000 km2 for over 4000 years, and the
presence and eventual drainage of this huge body of water are thought
to have fundamentally influenced dynamics of the Laurentide Ice Sheet
(Clayton et al., 1985), regional climate (Hostetler et al., 2000) and
ocean-climate systems (Broecker et al., 1989).
In this study the researchers used two different types of
archives, porewater and cellulose, to estimate the
isotopic composition of Lake Agassiz from a core
from the Montcalm site in the middle of the
southern basin of Lake Agassiz.
See Poster
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