During Fraser Glaciation central British Columbia was covered by glacier ice that accumulated in the Coast and Cariboo Mountains, flowed inwardly as a piedmont glacier to the Interior Plateau and thence northeasterly as an ice sheet toward the Rocky Mountains. After withdrawal of the Fraser ice sheet a limited re-advance of ice from Cariboo and Coast Mountains took place but not as a coalescent ice sheet. Drumlinoid forms, eskers, meltwater channels, kettled deposits, and lacustrine deposits provide ample evidence from which a glacial history of the area can be deduced. Although Fraser Glaciation is not believed to have culminated as an ice dome over central British Columbia, there is some evidence to suggest that earlier glaciations did form such a dome from which ice flowed radially over the Coast and Rocky Mountains.

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