Dating a dinosaur bone
Instead, other methods are used to work out a fossil’s age.These include radiometric dating of volcanic layers above or below the fossils or by comparisons to similar rocks and fossils of known ages.Abstract: The discovery of collagen in a Tyrannosaurus-rex dinosaur femur bone was recently reported in the journal Science.Its geologic location was the Hell Creek Formation in the State of Montana, United States of America.
Perhaps using Bertazzo's high-powered microscopes to take a close look at bone crystals in fossils could help her understand the mechanical stresses the ancient beasts' bodies endured."I was wondering, has anyone put dinosaur bone under there? "Let's just see what happens."It took some time for the scientists to convince a museum to allow them to break off pieces of ancient dinosaur bone for the experiment.Different methods have their own limitations, especially with regard to the age range they can measure and the substances they can date.A common problem with any dating method is that a sample may be contaminated with older or younger material and give a false age.Knowing when a dinosaur or other animal lived is important because it helps us place them on the evolutionary family tree.Accurate dates also allow us to create sequences of evolutionary change and work out when species appeared or became extinct. These are: Where possible, several different methods are used and each method is repeated to confirm the results obtained and improve accuracy.
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.