Rather, it was the flooding of just the Black Sea region caused by the end of the last Ice Age. During the Ice Age, sea levels had dropped exponentially. Partly because the temperatures did not immediately skyrocket, partly because the the oceans had to be refilled before any flooding could take place and partly because the incredibly dense glaciers took longer to melt, the actual flooding of the Black Sea region did not occur until about 5,000 B.C. Now, converting that to how you measured time ( Years before the present as opposed to years Before Christ ) we get the year :7,016 years ago. Now, that doesn't line up perfectly with either of your guesses, but it is definitely closer to your "Real time" estimate.