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.

I once lived in New Hampshire. The top of the tallest mountain, Mt
Washington, 1910 m high, somewhat more than a mile, was covered at the
peak of the last ice age. As the flow of the ice was from north to south,
then anything to the north of this would have had more than a mile of ice
covering it. Montreal, Quebec City, etc. As I was far closer to Mt
Washington than the terminal moraine (Long Island, Block Island,
Nantucket), the ice was probably near to a mile thick were I lived.

Where I live today (Seattle, WA) probably had a peak coverage of only a
thousand meters or so, based on moraine deposits on the sides of the
mountains both west and east of Seattle.

Of course, the peak of the last ice age probably wasn't 20kya. Is that
your point?


--
Phil Hays