That’s pretty impressive.
In the span of six weeks, the power of the water chiseled out 21 feet of BEDROCK for a distance of more than 2 kilometers.
One can easily ask, what COULD it (that same power) do in a period of seven to ten months - the approximate length of time of Noah’s flood.
Well, event like this happen in minutes...
The question is not one of water carving bedrock - it clearly happens. My question in this case would be, what is the bedrock? Judging from the photograph, I'd say limestone, a water soluble rock. If you want to know how a valley is formed, you don't just look at the valley. You also look at the sediments that were removed.