[Grut]

...it was probably 300' lower in the Gulf of Mexico, as well.

Or more. The principle of isostacy says that if the weight of the glaciers pressed arctic lands down, non-arctic lands would have risen to keep the volume of the earth the same. So the apparent drop in sea level would have been greater towards the equator.

[blam]

I expect all the 8,000 year old going-ons is linked to the collapse of the ice dams containing Lake Agassiz in North America. Flooding the oceans with not only more water but, a sudden rush of fresh water.

[okie01]

"The principle of isostacy..."

Isostacy. What a great word!

The geologic equivalent of "regressing to the mean"...