"I would be interested to hear your opinion on some of the processes that occurred, which were formerly thought to require great amounts of time, after Mt. Saint Helens errupted in 1980?"
Really? Are you talking about comparing the formation of the Grand Canyon to the erosion of the unconsolidated stuff from Mount Saint Helens? If so, I have nothing to discuss with you.
Go to your back yard. Pile up some sand, then turn the garden hose on it. Now, pile up some concrete blocks. Turn the garden hose on that. There is your answer.
Wow! You are like one of those "freedom of speechers" who really only wants freedom of speech for yourself. You are such an angry man! I feel sad for you!