When the waters of Noah’s Flood had receded off the continents into the new ocean basins, expansive puddles (so to speak) of water were left behind, for instance lakes Hopi and Grand to the east of a huge north-to-south trending muddy sandbar now called the Kaibab and Coconino plateaus, the Colorado river today between those plateaus where lakes Hopi and Grand had both broken through when that muddy sandbar was still wet, perhaps over-topped by prodigious rainfall (the beginning of the Ice Age) to form the Grand Canyon, maybe only days or weeks after almost all of the rest of the floodwater had slid off the continents (see Page titled Natural Selection by Noah’s Flood).
