Age dating dinosaur bones

Posted by / 15-Dec-2017 05:36

When an organism dies it ceases to replenish carbon in its tissues and the decay of carbon 14 to nitrogen 14 changes the ratio of carbon 12 to carbon 14.Experts can compare the ratio of carbon 12 to carbon 14 in dead material to the ratio when the organism was alive to estimate the date of its death.A group of superbly preserved dinosaur fossils discovered in Montana are giving scientists a fuller understanding of the history, evolution, and appearance of the giant theropods known as tyrannosaurs. In case you thought otherwise, it turns out the dinosaurs didn’t have lips.The newly discovered fossils include the skeletons of an adult and subadult tyrannosaur, along with the lower jaw and other scattered remains of juvenile dinos that together comprise a new species.In the case of radiocarbon dating, the half-life of carbon 14 is 5,730 years.

The stable form of carbon is carbon 12 and the radioactive isotope carbon 14 decays over time into nitrogen 14 and other particles.Carbon is naturally in all living organisms and is replenished in the tissues by eating other organisms or by breathing air that contains carbon.At any particular time all living organisms have approximately the same ratio of carbon 12 to carbon 14 in their tissues.They used a new laser technique to measure radioisotopes in the bone, yielding an age of millions of years.But this "age" was not only the result of a broken radioisotope system, it was contrived to agree with previously assigned dates for the samples.

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