Some more photos to illustrate my points.
Again, rushing water strong enough to erode hundreds of feet of solid rock should not leave columns of rock in the middle of the erosion area like this:
http://www.iinet.com/~englishriver/Lewi … loods.html
And an on rush of water to rapidly erode solid rock should also not exhibit such curves during erosion:
https://debatingchristianity.com/forum/viewtopic.php?p=85657#p85657