I am told there were large pockets of skeletal remains found in the US, where something drove them all to higher ground before they all drowned and were buried in the mud. Kinda proves a worldwide flood theory though, which takes me back to the bible. Also, it is said by science/archaeology that the southwest was once a great inland sea, so, leftovers from the flood? I have property in the big bend of west Texas. There are sea shells there but no water. It was said to be very tropical at one point.
Same with places like the grand canyon, which we are told took millions of years to make. My dad bought a house and brought fill in to make his driveway. Before it could be packed in, a torrential rain came and as it ran off into the swamp it left behind a mini grand canyon and he had to buy more fill. So I see it as something that also could've happened in a pretty short time frame. And just south in Mexico is copper canyon, which is far larger than the grand canyon so obviously there was a lot of water moving there whether it was millions of years or a year/few years/decade etc.