Hi Charles
I quite agree. Popular YEC acts as is C14 is the only abosulte taking
technique. of course, to be fair, most people in the general community have
only heard of C14 as well. The article by Roger Weins on the ASA resources
(http://asa.calvin.edu/ASA/resources/Wiens.html) is very good, and Mark
should refer to it..
GB
Jon
Charles W Carrigan wrote:
> > Glenn Morton has or had a page on C14 correlated against tree rings and
> > varves. These data show that, done properly, C14 is a very reliable
> > technique. The tree rings go back 10,000 years and the varves go back
> > 40,000 years. I can't find it on his page, so if you contact him he
> > should be able to give you details.
>
> All this about 14C is well and good, but let's remember that you can't
> date many rocks, much less the planet, using carbon. It is really
> only used for organic material. YEC's like to
> criticize 14C dating and say this somehow means the
> earth is young. But if you want to date rocks you use U-Pb, Sm-Nd, K-Ar,
> Lu-Hf if you are super spiffy, and Rb-Sr if you are daring.
> The criticisms of YEC's against 14C (as if this had anything to do
> with the age of the earth) only show ignorance about how
> rocks, and in turn the earth, are dated.
>
> Back to 14C, I believe it has also been calibrated against the U series,
> which doesn't vary with belches from the sun.
>
> Cheers,
> C
> *****************************************************
> Charles W. Carrigan
> Univ. of Michigan - Department of Geological Sciences
> 2534 C.C. Little Bldg.
> 425 E. University Ave.
> Ann Arbor, MI 48109-1063
> cwcarrig@umich.edu
>
> "The point of having an open mind, like an open mouth,
> is to close it on something solid."
> -G.K. Chesterton
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