Alberta During the Last Glacial Event (Late Wisconsin)

This image displays the ice flow of the Laurentide Ice Sheet during the last glacial event (Late Wisconsin, about 20,000 to 9,000 (radiocarbon) years ago).

The large arrows indicate ice flow at glacial maximum. The smaller arrows indicate general flow directions during deglaciation.

This animation shows the retreat of the Laurentide Ice Sheet in Alberta.

Source: Deglaciation of North America; Geological Survey of Canada, Open File 1574.