one possibility.
http://www.talkorigins.org/faqs/c14.html
not just in coal, but in fossil fuels. a short answer here.
http://www.talkorigins.org/indexcc/CD/CD011_6.html
i don't know though. life is funny. they're finding bacteria that grow in rock. form's that grow without oxygen. could be from bacteria that have been found in coal and fossil fuels. no apparent decisive answer. but you would be pushing into a flood theory i'm assuming. you may want to check here for the doubts on that.
http://www.talkorigins.org/faqs/faq-noahs-ark.html
and if you read the theologyweb link, it's not regarding anything in your trueorigin link. a few well informed folk point out his errors. i'll quote a small section.
"But here's the real clincher that demonstrates how deceitful and deceptive Hupmhreys' "research" is:
Figure 6(a) from the recent article presented at ICC#5 shows, as I've already detailed, steps 15-44 of Farley's data. So Humphreys excluded the data from the initial run up to 500degC, which also happens to be the steepest, straightest data, giving the highest activation energy and the lowest diffusion rates.
The graph also show sample FTC1 from Reiners' paper (linked above). Did Humphreys show all the data from this sample?
No. Once again, he couldn't let us see all the data, he had to pick out the best parts (meaning the data that fits his model).
Did Humphreys use the same criteria when choosing which data points to include in the graph?
Yes and no. He again excluded the steepest, straightest data, keeping the erratic, higher diffusion steps. But this time he kept the initial steps, and threw out the down steps!
In both cases he keeps the data that helps his model, throwing out the data that supports the opposition. Obviously he wasn't trying to find the straightest, smoothest Arrhenius plot, because he excluded the best-fitting data in both sets. He wasn't consistently dropping the initial run-up to 500degC, because he kept it in the FCT sample. A more odious example of scientific hypocricy could not be found, in my opinion.
But WAIT! That's not all. To top it off, he multiplied the Reiners data by 10, moving it up on the graph above the Jemez zircon line.
The total effect of all this data-massaging is to make the measured diffusion data in figure 6(a) and figure 8 appear to line up very neatly with the Creation model derived points 1 through 5 in figure 8. He brags about how nicely they match:
"Figure 8 shows the zircon data from the Jemez Granodiorite, along with the two models. The zircon data are fully consistent with the creation model. These new data are also quite consistent with all published zircon data, as Figure 6(a) shows. As of this writing (February, 2003) we do not have reliable data on the Jemez zircons below 300ºC. But notice that the data have the same slope as the creation model points for samples 3, 4, and 5, and the data nearly touch point 5."
This is all hogwash, as I have shown.
If all the data were plotted on figure 8, especially the smooth straight plots from Reiners' samples, they would line up with the Uniformitarian Model points 1 through 3, and points 4 and 5 would be just below it.
The Creation Model points would be left high and dry, floating above the real diffusion values like a mirage. "