Free web cam naked mom and son - Dating a dinosaur bone
Their new technique involved first polishing a slice of bone and then shooting a laser beam onto its surface.The laser dislodged radioisotopes and other relevant isotopes, which were detected and counted.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.
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.
Accelerated Mass Spectrometer (AMS) dating of dinosaur bone bio-apatite from 170 grams of bone fragments and milligram surface scrapings of an Acrocanthosaurus dinosaur gave ages of 25,750 ± 280 and 23,760 ± 270 respectively.
No collagen was detected and only bone bio-apatite was RC dated.
Instead, other methods are used to work out a fossil’s age.