Historical artefacts like moa bones can be dated using a technique that measures the activity of the radioisotope carbon still present in the sample. By comparing this with a modern standard, an estimate of the calendar age of the artefact can be made. To use this interactive, move your mouse or finger over any of the labelled boxes and click to obtain more information. Amongst the artefacts that have been found are ancient moa bones.
Are the results a confirmation of rapid formation of the geologic column as modern sedimentology studies have predicted? Key Words : Radiocarbon dating, dinosaur, bone collagen, organic carbon, bone bio-apatite, fossil wood, amber, megafauna. Bone collagen and soft tissue were recently reported as having been discovered in a Tyrannosaurus dinosaur femur bone as well as other fossil bones from the Cretaceous period of the geologic column by Mary H. Schweitzer et al. According to Dr. Libby, the inventor of the radiocarbon dating method, " There is no known natural mechanism by which collagen may be altered to yield a false age. It is common practice to determine the age of bones by radiocarbon RC dating of extracted bone collagen but not of dinosaurs because they are assumed to have become extinct 65 million years BP and, therefore, too old for RC dating.
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Carbon 14 C , or radiocarbon , is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons. Its presence in organic materials is the basis of the radiocarbon dating method pioneered by Willard Libby and colleagues to date archaeological, geological and hydrogeological samples. Its existence had been suggested by Franz Kurie in The primary natural source of carbon on Earth is cosmic ray action on nitrogen in the atmosphere, and it is therefore a cosmogenic nuclide. However, open-air nuclear testing between and contributed to this pool.
By: Marshall Brain. A child mummy is found high in the Andes and the archaeologist says the child lived more than 2, years ago. How do scientists know how old an object or human remains are?