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Which parts of North America and Europe were covered by major ice sheets during Pleistocene glaciations?

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Quaternary paleogeography — Quaternary Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the Quaternary Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.

During the Pleistocene Epoch, vast regions of North America and Europe were covered by major ice sheets.12

North America

Two primary ice sheets dominated the continent:
* Laurentide Ice Sheet: The largest ice mass in North America, it extended from the Canadian Rocky Mountains in the west to Newfoundland and Nova Scotia in the east. At its maximum, it reached as far south as latitude 37° N, covering parts of the northern United States, including Illinois, New York, and New England.345
* Cordilleran Ice Sheet: This sheet formed in the mountainous regions stretching from western Alaska to northern Washington.25

Europe

The largest contiguous ice mass was the Scandinavian Ice Sheet (or Fennoscandian Ice Sheet):
* It covered most of Great Britain and extended south across central Germany and Poland.5
* It reached northeast across the northern Russian Plain toward the Arctic Ocean, reaching a maximum southern latitude of approximately 48° N.25
* Additionally, smaller glaciers and ice caps developed in the Alps and other high mountain ranges across Europe.5