Simple math tells us how much water was needed to cover the earth as described in Genesis...
What percentage came from rains vs ground water? Pick a number, any number. It really doesn't matter. Let's use 50/50.
That means that 407 million cubic miles of water came from underground - in 960 hours. That's 424,000 cubic miles per hour. All coming up, you say, from a crack about 10,000 miles long.
Have you given any thought to the massive waves that this would have created?
Have you given any thought to how the ark could have survived these massive waves?
But wait, there's more. All that warm water coming out of the earth would have interacted with the Atlantic's existing water.
Have you given any thought to the massive hurricanes that this would have created?
Have you given any thought to how the ark could have survived these massive hurricanes?
Yes, these are rhetorical questions.