Geoscience Reference
In-Depth Information
Figure 10.9.
The Laurentide Ice Sheet and the routing of overflow from the Lake
Aggasiz basin (dashed line) to the Gulf of Mexico just before the Younger Dryas (a)
and routing of overflow from Lake Aggasiz through the Great Lakes to the St. Lawrence
and northern North Atlantic during the Younger Dryas (b) (from Broecker et al.,
1989
,
by permission of Nature).
immediately preceded faunal evidence for coolings associated with weakenings of
the THC. The THC then recovered. The cause and effect is hence reminiscent of
the salt-oscillator model. The more recent of these melting events (~13.4-13.0 ka)
may have triggered the much longer and more severe YD. They note a link between
