Please discuss that with Dr John Baumgardner. He is the one that developed the model, not me.
Such minor details have been pointed out to him.
“My conclusion is that the Flood was one facet of a larger global-scale tectonic cataclysm. A key aspect of this catastrophe was the rapid sinking, in conveyor belt fashion, of the pre-Flood ocean tectonic plates into the earth’s interior. The energy required for the process was derived from the earth’s gravity acting on the excess weight of these cold ocean plates relative to the hotter and less dense mantle rock into which they slid.”
Nothing in the bible about the enormous heating of the earth and oceans by the hot mantle rocks that were raised up and exposed.