However, you now know why this fact doesn't at all invalidate radiocarbon dates of objects younger than twenty thousand years and is certainly no evidence for the notion that coals and oils might be no older than fifty thousand years. In fact, the experiments cited by the creationists appear to be attempts to establish the measurement error of there equipment. An example of this would be the oft' repeated assertion that ample and anomalous amounts of C have been found in coal. Carbon-dating skeptics deniers also claim that the inconsistency of 14C levels in the atmosphere over the past 60, years creates causes a validity issue. What specifically does C dating show that creates problems for the creation model? Radiocarbon dating doesn't work well on objects much older than twenty thousand years, because such objects have so little C left that their beta radiation is swamped out by the background radiation of cosmic rays and potassium K decay. This research is part of the "Old Carbon Project" funded by the U. Lowe then makes a reasonable case for fungi and bacteria - there are fungi that can degrade lignite Polyporus versicolor and Poria montiola , as well as autotrophic "thiobacillus-like" bacteria that oxidize pyrites in coal, and he points out that bacteria have been found 3km underground apparently living on granite. The team will be presenting results to date this September at the 9th International Conference on Accelerator Mass Spectrometry in Japan. It depends upon the radioactive decay of carbon 14C , an unstable isotope of carbon which is continually synthesized in the upper atmosphere by cosmic rays.
The radiocarbon dates and tree-ring dates of these other trees agree with those Ferguson got from the bristlecone pine. Before his work, the tree-ring sequence of the sequoias had been worked out back to BC. Presumably most of these bacteria never interact with the "modern" 14C of the atmosphere. For older samples, other dating methods must be used. Even before the tree-ring calibration data were available to them, he and the archeologist, Evzen Neustupny, were able to suggest how much this would affect the radiocarbon dates. How do you answer him? When dating wood there is no such problem because wood gets its carbon straight from the air, complete with a full dose of C Hey, I really lucked out with my first email to an AMS researcher. So, it looks like in-situ production of new 14C is the best-supported hypothesis; but research is ongoing, and I look forward to seeing the results of the Old Carbon Project and new research on the deep subterranean bacteria. The much longer version: Even before the bristlecone pine calibration of C dating was worked out by Ferguson, Bucha predicted that this change in the magnetic field would make radiocarbon dates too young. One of the most striking examples of different dating methods confirming each other is Stonehenge. In particular, given a pure sample of C12, I suspect a mass spectrometer would indicate that a non-zero amount of C14 present. This means that the tree-ring dates would be slightly too young, not too old. I might be able to see if I can come up with some references. But the young-earth creationists at ICR and elsewhere insist that, if an ice age occurred, it must have come and gone far less than ten thousand years ago, sometime after Noah's flood. But some deep bacterial activity apparently can result in increased concentrations of 13C. Since the halflife of carbon is 5, years, any that was present in the coal at the time of formation should have long since decayed to stable daughter products. In other words, it rose in intensity from 0. Wouldn't that spoil the tree-ring count? Yet, instead of seriously attempting to rebut them with up-to-date evidence, Barnes merely quoted the old guesses of authors who wrote before the facts were known. Since the tree ring counts have reliably dated some specimens of wood all the way back to BC, one can check out the C dates against the tree-ring-count dates. Another possible avenue is C13, which has a small but non-zero neutron absorption cross section. Hawkins calculated with a computer what the heavens were like back in the second millennium BC, accounting for the precession of the equinoxes, and found that Stonehenge had many significant alignments with various extreme positions of the sun and moon for example, the hellstone marked the point where the sun rose on the first day of summer. I now understand why fossil fuels are not routinely used in radiometric dating! Before plate tectonics and continental drift became established in the mid-sixties, the known evidence for magnetic reversals was rather scanty, and geophysicists often tried to invent ingenious mechanisms with which to account for this evidence rather than believe in magnetic reversals.
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