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“This is the first time a structure mentioned in the Bible has been radiometrically dated,” Frumkin told Physics Web.“Our dating agrees well with that of the reign of King Hezekiah.
Scientists have tried to extend confidence in the carbon dating method further back in time by calibrating the method using tree ring dating.
Unfortunately, tree ring dating is itself not entirely reliable, especially the "long chronology" employed to calibrate the carbon dating method.
With time, thorium-230 accumulates in the sample through radioactive decay.
They calculate the sample’s age by the difference in the initial ratio of thorium-230 to uranium-234 and the one in the sample being dated.
By taking a carboniferous specimen of known age (that is, a specimen which we are able to date with reasonable certainty through some archaeological means), scientists are able to determine what the ratio was during a specimen's lifetime.
They are then able to calibrate the carbon dating method to produce fairly accurate results.Samples from the Siloam tunnel, which the books of Kings and Chronicles say was constructed in ancient Jerusalem during the reign of King Hezekiah, have been dated using radiometric techniques by researchers from Israel and the UK.Amos Frumkin at the Hebrew University of Jerusalem and colleagues at the Geological Survey of Israel and Reading University calculate that the tunnel was built in about 700 BC, and that the biblical text provides an accurate historical record of the tunnel’s construction (A Frumkin et al. To date the tunnel, the researchers measured samples of plants and wood contained within the plaster that lined the tunnel.Until now this presumption was based only on the biblical text and on the inscription found on the tunnel itself.” The team now hopes that their technique will be used to date other historical and biblical structures.Did you know that radiocarbon dating may offer supporting evidence for Noah's Flood?The geologists then dated stalactite material – known to have formed after the tunnel was built – from the ceiling of the tunnel.They used uranium-thorium dating by thermal ionization mass spectrometery at the Open University in the UK.Carbon dating is thus accurate within the timeframe set by other archaeological dating techniques.Unfortunately, we aren't able to reliably date artifacts beyond several thousand years.The result is that carbon dating is accurate for only a few thousand years. This fact is born out in how carbon dating results are used by scientists in the scientific literature.Many scientists will use carbon dating test results to back up their position if the results agree with their preconceived theories.