There was a flood after the meditteran salinity crysis, which happened partly due to lowered pressure in the nord causing the ground in the south to recede after the ice was gone (think of pressing in a balloon). There was a theory that the black sea flood (was half as big prior) due to this was what we know as the great flood, with humanity living mostly around there at the time, but i think it was refuted, because the flooding happened over generations there.

The thing with glacier seas happened mostly in scandinavia, gb, up there, creating the english channel (the heck? German it is Ärmelkanal).