Very interesting. I knew the Great Lakes were carved or otherwise formed by the great glacial activity but I had not heard of the rebounding theory.
Wasn’t there have supposed to have been a great filling (or refilling) of the Mediterranean Sea, the Black Sea and I suppose many other ancient basins?
There is a quite a bit of rebounding land including in northern Europe. Part of the compensation for the rebounding is sinking further south (e.g. here in the midatlantic and southward). I think in Europe the filling of the Black Sea was after sea levels rose a couple hundred feet with the ending of the ice age. Europe also had the Alps covered in ice so there were/are probably other local isostatic effects.