Specifically, a vast lake has been postulated as covering the current Great Lakes and land to the north, held in place by an ice dam; with the breaking of the dam, the entire lake might drain in weeks, resulting in the sudden rise of sea levels, conceivably causing the overflow and breakthrough of the Mediterranean into the Black Sea.
That would allow for a common Flood event around the world. With reference to your article, it should be noted that the Gilgamesh and Noah stories are very similar, because they originate in the same area, and likely relate to the same (historical?) individual.










