I think that here is one of Faith's mistakes.
quote:
So if the Mississippian "period" took 50 million years to form, as one of my charts of the Grand Canyon says it did, which is nothing but "redwall" limestone, and according to Wikipedia from 450 to 525 feet thick in the canyon, rounding it to 500 feet means it accumulated about a foot in 100,000 years. That's a pretty slow rate of deposition.
Here are the simple problems with the claim that I know about:
1) Lithification involves compression - the oriignal sediment would have been thicker.
2) The Redwall limestoen has been eroded and is thinner because of that - And of course, the erosion indicates a period where there was no net depositon.
3) The Redwall is not uniform. Nor is it a single stratum as Faith seems to believe. A more detailed description is found
here:
The Redwall is divided into four members: the Whitmore Wash, Thunder Springs, Mooney Falls, and Horseshoe Mesa members. The Whitmore Wash is nearly pure calcium carbonate (98% pure). The Thunder Springs member consists of alternating layers of chert and carbonate. The Mooney Falls member is once again almost totally pure calcium carbonate (99.5%). The Horseshoe Mesa member consists of thinly-bedded carbonate with occasional chert lenses
Another significant point mentioned is:
...the base of the Redwall contains a conglomerate of angular limestone and dolomite blocks derived from the underlying Temple Butte
Which clearly indicates that the lower strata mentioned had been lithified and partly broken up prior to the deposition of the Redwall formation. How does that fit into a Flood scenario ?t
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