[Thatcherite]

However, you failed to answer the question as to how much water, as in cubic measurements would it take to carve out the Grand Canyon?

I can't be bothered to work it out, and I don't see the relevance of the question. What it doesn't look remotely like is the result of any kind of sudden event like a damburst or flood. Apart from the meanders there are angular unconformities in the rocks it cuts through, which completely falsifies any notion that it could have formed rapidly through soft sediments.

[Californiajones]

The relevance of the question about water in the Grand Canyon is that it was an enormous body of water moving through there at one time. I'm curious as to how geology accounts for this fact. That's why I was thinking about it and posted it.