[Junior]

Number one, the river is wearing away at the rock -- at no point was the river 2000 feet deep; it may have only been 20 feet deep, but over the years the water wore away at the rock and the canyon formed. Also, the river bed changed course numerous times over millions of years, causing the various channels to be cut. One need not postulate any other mechanism than water erosion and time.

[medved]

Aside from the basic impossibility of a 20-mile-wide river wearing its edges straight downward 1500', there is also the problem of the mesas. Since the mesas would have been worn glassy smooth had they ever been under water, a person claiming the river created the canyon also has to believe that God or Chuck Darwin or somebody created the mesas AFTER the river had worn the canyon down to its present river bed. Pretty far fetched.

[f.Christian]

One need not postulate any other mechanism than water erosion and time.

You never saw--heard of a drying--shrinking crack? Ever see one in mud??

One need not postulate any other mechanism than water erosion and time---

...you believe that?

Is that how you learn--think--teach..."one need not"?

No wonder you believe this evolution infantile nonsense---garbage!