If, as Genesis says, "the fountains of the great deep burst fourth" -- and I believe they did -- then it wasn't just water that came gushing out, but steam, which acted like a nuclear bomb and drove portions of the Earth's crust high into the atmosphere, superheated by the explosion and supercooled by being flung into the stratosphere.
The resulting "mudfall" would have buried a giant wooly mammoth in microseconds under feet and tons of dirt. That's how whole trees stand upright under hundreds of feet of sedimentary rock, to be discovered by accident when drilling rigs go right through them in an effort to reach oil pockets. That is how reptiles are found frozen in time, their last meal still fresh in their mouths.
Evolution can't explain any of this, so its adherents dismiss such accounts as fallacies.
Let 'em tell that to God when they meet Him -- ever so briefly.