How does this Bolling period compare to the Noah’s ark period, where a theory is that a glacier or some other barrier broke and the Black Sea flooded?
You aren’t going to like this, but Noahs Ark is part of a story. Of course, the story could have been inspired by real events, but I suspect that the flooding idea was more easily derived from the annual floods of the Tigris and Euphrates rivers than from an event involving the Black Sea.
Similar flood stories are found through the region of Mesopotamia. The best known is the Gilgamesh Epic, a popular story for thousands of years. Gilgamesh lived around 2500 BC. The best-known version of the Gilgamesh Epic is from about 649 BC. It is an etiological tale, with many smaller etiological stories within it.
One part is very much like the Noah story, which clearly borrows from it.
Now that you are, I fear, disturbed about what I am saying, please calm down and be reassured. The point of the story of Noah is not in the little incidentals: it is in the lesson, and what it says about God and Man. Gilgamesh Epic has almost no moral content. Noahs story is, by contrast, all about ethics, and how God will deal with sinful man. It is written, of course, from the understanding of the ancient Hebrew people.
The delightful story of Noah says, basically, that God will not deal with the problem of sin merely by wiping out mankind, which (as the story clearly and intentionally illustrates) he very well could. That message is very profound, and I trust, true. Certainly I hope that it is true!