Bob Brown wrote:

Someone said "where I live the ice was a mile thick 20K years ago"
I have to assume he meant some city in a well populated area, not some
area unpopulated like an ice shelf.

Are you claiming that the Laurentide ice sheet wasn't a mile thick in
many places? Sorry to burst your bubble, but it was. Your criterion for
populated cities is meaningless. Back then, the entire area was, except
perhaps for the occasional straggler, devoid of humans.

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