[blam]

In 5600BC the freshwater Black Sea was flooded by a breach through the Bosphorus to the Mediterranean that converted the Black Sea to a saltwater lake.

This may have been Noah's Flood (Ryan & Pittman).

The whole area around the Black Sea at that time was very arid and the Proto-Celtic fishermen and 'irrigation' farmers would have been terribly stressed when the fresh water 'lake' was converted to salt water. They would have had to flee/migrate. The map illustrates possible migrations that ocurred during that period.

[LostTribe]

The map works for me at the conceptual level, but NOBODY ever asserted there were Celts in Europe in 5600 BC.