The geological forces that are going on today have always gone on at the same sort of range of speeds, and with the same sort of results. All natural actions, and results, no supernatural. For anyone to say that something happened by god will require extremely good proof, as extraordinary results require extraordinary proof. Consider the biblical flood. How big was the known world, that is know to the survivors in the days of walking on foot, perhaps horses, where long distance travel was limited to the sort of distances horses could travel, day after day in pre-road days. Perhaps 7 days wide, perhaps 300 miles. So when the Black Sea flooded after the ice age ended... some 8000 to 9000 years ago, and a barn may have floated, and perhaps someone had seen the ice damn, and realized it would melt and built a float-able barn for the farm animals, and no one was recording time in a meaningful way... what happened? So what ever happened must match the geological record. A big part of story telling is making it seam more interesting than it actually is.
So the geological record must be physically true, and the supernatural explanation is just wrong hypothesis. Is any thing else logical? So then the 6000 year old earth, is just bullshit. Bullshit has a definition; the author does not know and does not care if the statement is true or not. That is the best expression of the probable outcome.