I've been looking at the young earth/flood erosion argument as well as the talkorigins proposed explanations see bottom left:
I think (despite talkorigins claims) that this is an area that creationists can still hold a strong easy to understand argument.
The erosion arguments involve:
1. Total continental erosion:
"North America is being denuded at a rate that could level it in a mere 10 million years, or, to put it another way, at the same rate, ten North Americas could have been eroded since middle Cretaceous time 100 m.y. ago."
Dott, R. H. and R. L. Batten. 1971. Evolution of the earth. McGraw-Hill, New York.
see also http://www.answersin...v22/i2/ages.asp http://www.grisda.or...gins/13064.htm)
2. Paraconfomity erosion
"At a 10-million-year paraconformity gap we would expect an average of about 300 m (1000 ft) of removal of the underlayer; but we usually see nothing to suggest that the missing layers were ever present." Roth
(see page 3.)
I hope to shortly provide reasons why the talkorigins explanations (below) do not solve the problem.
Young-earth "proof" #15: Continents are eroding at a rate which would bring them to sea level in less than 14 million years. Inasmuch as the continents are anything but flat, the earth cannot be billions of years old. (27.5 x 109 tons sediment/year are lost to the oceans by erosion; the present mass of the continents above sea level is 383 x 1015 tons.)
15. This argument, advanced by creationist Stuart E. Nevins [Pseudonym for Steve Austin -- editor] in the ICR Impact series (No.8) in 1973, simply ignores the impact of modern geology! Nevins overlooks the fact that the continents are dynamic and have grown appreciably over time, both by accretion of material at the margins and by addition of material from the mantle below (Dalrymple, 1984, p.114). Volcanic activity, the emplacement of gigantic masses of rising, molten rock, and the stupendous compressional forces of the earth's colliding plates have been building mountains off and on for billions of years. Mountain building is going on even now in many parts of the world.
I could also mention that the current rates of erosion are particularly high and that isostatic rebound would greatly increase the time for a continent to erode flat, but that's just icing on the cake. Any argument which pretends that continents are inert lumps of rock subject only to erosion is out of touch with reality. We need not consider it further.
Davis A. Young (1988, pp.128-131) treats Nevins' argument in more detail. Another point made by Nevins is that sediment is piling up on the ocean floor faster than it's being removed. Even if that's true, there is no reason to view it as being anything more than a temporary imbalance.
...it is generally regarded by geologists that the rates of erosion at present are relatively high because of the topography of the continents. The continental land masses are believed to be much more rugged and mountainous than is usually the case, and mountainous topography speeds up rates of erosion. Thus at the present time we ought fully to expect that more sediment is being added to the oceans than is being removed. Paleogeography indicates that very often in the past the opposite was the case.
(Young, 1988, p.131)
Thus, we have no problem from that quarter either.