Pleistocene Ice Coverage: ~13,000 years ago
Place your mouse over this image to see the extent of the ice
sheet during the Pleistocene. Measurements represent ice depth.
Pleistocene snow accumulations in mountain ranges
in British Columbia created a spreading ice sheet (the Cordilleran
Ice Sheet) which pushed ice through lowlands of northern Washington
as far south as Puget Sound. Compare this map with the extent of
alpine ice in the Upper Skagit during
the Pleistocene.
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