Dinosaurs and carbon dating


07-Sep-2016 03:57

dinosaurs and carbon dating-86

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Back in 20, Schweitzer re­ported in that she and her colleagues had isolated intact protein fragments from 65-million- and 80-million-year-old dino­saur fossils.But the claims were met with howls of skepticism from biochemists and paleontologists who saw no way that fragile organic mol­ecules could survive for tens of millions of years, and wondered whether her samples were contaminated with modern proteins.Our investigation has shown that the pretreatment of bone with diluted acetic acid following a proscribed technique allows the separation of the bioapatite fraction from diagenetic carbonates. The lab might not have been able to completely isolate the fossil’s original bioapatite, so the result may have contamination in it.Please note that “diagenetic carbonates” refer to contaminants that occur during the fossilization process. Since the lab specifically reported a date for the fossil’s bioapatite, I have to assume that the investigators who actually did the preparation and dating think they were dating the fossil’s original bioapatite, not a mixture of bone and contaminants. However, I think it adds to the case that the bone is not millions of years old.The Schweitzer paper is a “milestone,” says ancient protein expert Enrico Cap­pellini of the University of Copenhagen’s Natural History Museum of Denmark, who was skeptical of some of Schweitzer’s ear­lier work.“I’m fully convinced beyond a reasonable doubt the evidence is authen­tic.” He calls the second study “a long shot that is suggestive.” But together, Cappellini and others argue, the papers have the po­tential to transform dinosaur paleontology into a molecular science, much as analyz­ing ancient DNA has revolutionized the study of human evolution.

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Secular researchers routinely detect radiocarbon in carbon-containing materials like coal, oil, marble, and diamond—materials they would like to use as "carbon dead" standards.Comparable amounts of radiocarbon showed up in almost 50 total samples.



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