A follow-on hypothesis to the YD impact hypothesis is Atlantis existing exactly where Plato's Timaeus describes. West of the Pillars of Heracles in the middle of the Atlantic. That describes the Azores. If the YDB hypothesis is correct and immense amounts of ice were removed quickly the spheroid of Earth would change shape dramatically. The previously ice covered areas rebound up and areas that were squeezed out subside. Couple isostatic rebound with immense amounts of meltwater and it is possible that the Azores plateau was above sea level despite now being under 2000 meters of water.

Of course there isnt much evidence to support this hypothesis and it is dependent on the YDB impact hypothesis being correct. But, I found the possibility to be intriguing.

I demonstrated the idea of isostatic rebound to my kids by squeezing a balloon describing my hands as the ice pressing on the land. The bulges between my hands are areas not covered by ice. When my hands are removed the bulges disappear as previously covered areas bounce back up and squeezed out areas drop down.