As proposed, the Early Holocene Black Sea flood scenario describes events that would have profoundly affected prehistoric settlement in eastern Europe and adjacent parts of Asia and possibly was the basis of oral history concerning
Noah's flood.
[4] Some archaeologists support this theory as an explanation for the lack of
Neolithic sites in northern Turkey.
[5][6][7] In 2003, Ryan and coauthors revised the dating of the early Holocene flood to 8800 years ago, c. 6800 BC.
There is also a more thorough analysis of this in the Wikipedia article:
Black Sea deluge hypothesis - Wikipedia
Sorry, I needed to more up to date, and to have a more thorough article on this. When I look at dissensions to a sudden flooding, there is definitely doubt about it being sudden.
A 2012 study based on
process length variation of the
dinoflagellate cyst Lingulodinium machaerophorum shows no evidence for catastrophic flooding.
[30] Geophysical,
geochronological, and
geochemical evidence points to a "fast transgression" of the submergence lasting between 10 and 200 years.