This can easily be explained by a change of the earth's suface geometry (mountains height and oceans depth).A rapid change could have simply trigger mass of water to move across lands
How could that rapid change happen? Chemical differentiation happened long ago. Granite plates float of the mantel higher than basaltic plates. They dont suddenly sink into the mantle.
Keep digging.
Oh, I have thoroughly refuted your ideas. The idea that the surface of the Earth disobeyed physics to cause the flood is absurd.
