The Flood Myth

There's a big flood in the book of Genesis as well as other cultures: Flood myth. One hypothesis is that those stories originated from the time when the Black Sea basin was mainly dry land: Black Sea deluge theory at Wikipedia and The Search for Noah's Flood at National Geographic. Here's another possibility: Lost Civilization May Have Existed Beneath the Persian Gulf. During the last Ice Age the Persian Gulf was dry land and may have been heavily settled. Maybe the flooding there as water levels rose at the end of the Ice Age was the origin of the stories?