Plates, Shelves, and Ice Age Land Bridges

Hello Dr J, I know that you weren't there but maybe you have some ideas on this question:
Before the flood of Noah’s day, the land mass was in one piece.How long after the flood, through Catastrophic plate tectonics were the land mass separated into what we have now? I’ve read where it was torn apart and moving fast, and has now slowed down.
The reason I ask is, when the animals got off the ark, was the land masses already far apart, if so, how did the animals get across the vast oceans, or why would they want to even try? And also, if it was still moving while they got off the ark, that also would make it hard to cross. I've read somewhere about land bridges, but find it hard to visualize them as practical. Later on, when God confused the languages, He scattered the people all over the world, so maybe this was possible. Don't know Thanks Dr.J dom