If you we're a full blown creationist this is what you would argue? That God added water supernaturally somehow? There is no other way? What about Rain, oceans, etc etc?
In order to posit geological events as the cause of the flooding, you would require rapid geological movement via an unknown mechanism to raise the sea floor (and thus sea level) to cause the flood, and then more rapid geological movement after the flood to lower sea level and allow the water to recede, all without rendering the Earth uninhabitable or boiling away the flood waters.
Ok I see. Well, I can't argue with that because I believe God did cause the "fountains of the deep" to open up, which could have been housing waters. So that can be considered SN and the water that God added could have been by rain. Not poof.
This level of geological motion would be greater than the sum total of all geological activity involved in the breakup of Pangaea into the modern continents combined, focused into less time than the flood waters covered the Earth, twice.
Couldn't the flood have caused pangaea?
and then removed it after the flood was complete.
I can't buy that. I can buy the water being added by heavy rain but not removing it by poofing it gone. The water stayed here somehow, it's somewhere IMO.
Since parsimony also suggests ex nihilo water creation via an agent already known within the context of the narrative to create things like water ex nihilo, I think catastrophic geology is by far the less likely of the two hypotheses.
Well, it' works but still doesn't say how the water got here. When you say "God added water" how do you posit He did it? I'm not sure how to know how the rain fell. If it can rain "cats and dogs" X 1,000,000 could it work?