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The preferred method of dating dinosaur fossils is with the radiometric dating method.And the result of this accepted method dates dinosaur fossils to around 68 million years old. Its half-life ($t_$) is only 5,730 years—that is, every 5,730 years, half of it decays away.Dinosaurs are not dated with Carbon-14, yet some researchers have claimed that there is still Carbon-14 in the bones. Do these data indicate that a more accurate method needs to be derived?What solutions are available for increasing accuracy of the tests? From the source linked above: Carbon-14 is considered to be a highly reliable dating technique.“Humans and Neanderthals were living contemporaneously for quite some period of time in different parts of Europe,” says Tom Higham, an archaeologist at the University of Oxford, UK, who led the study.The long overlap provided plenty of time for cultural exchange and interbreeding, he adds.
If dinosaur bones are 65 million years old, there should not be one atom of C-14 left in them.The dating process is always designed to try to extract the carbon from a sample which is most representative of the original organism.In general it is always better to date a properly identified single entity (such as a cereal grain or an identified bone) rather than a mixture of unidentified organic remains.It is clear that the more difficult cases are at present not reliably dated, and must await a better understanding of the chemistry of diagenesis.The researchers used 196 radiocarbon dates of organic remains to show that Neanderthals disappeared from Europe around 40,000 years ago, but still long after humans arrived in the continent.
Radiocarbon dating is one of the most widely used scientific dating methods in archaeology and environmental science.