There is a theory that the Grand Canyon was not formed over millions of years but in just a few weeks.
According to the theory there was a huge ice dam that gave way sending billions of acre feet of water down through Arizona and gouged out the canyon very rapidly.
The 1980 eruption of Mt St Helens proves that water carving out these canyons and the hydrological sorting that occurs (leaving layers) occurs in days.
I can believe it....water is the most destructive thing on the planet.
It’s a pretty poor theory. Water carrying debris cannot cut a channel like that, through rock, at velocities the water could attain, in a short time, no matter how much water was dammed up. It’s pretty simple physics, actually.
If sedimentary soil, instead of rock, was involved, a canyon could be cut fairly quickly.