How many times was Maine covered by glacial ice during the Ice Age?
There is much evidence of the most recent continental ice sheet (the Laurentide Ice Sheet) but this latest glaciation eroded away, or left sedimentary deposits that covered, most traces of previous glacial episodes. Geologists have found numerous places in New England that show remnants of deeply weathered glacial till that was deposited by an earlier ice sheet. There were several glaciations in other parts of the country during the last 2-3 million years, but we don’t know how many of them covered Maine.
