The different elements of the carbon exchange reservoir vary in how much carbon they store, and in how long it takes for the 14 C generated by cosmic rays to fully mix with them. The half-life of carbon is 5, years, which means that it will take this amount of time for it to reduce from g of carbon to 50g — exactly half its original amount. The half-life of 14 C the time it takes for half of a given amount of 14 C to decay is about 5, years, so its concentration in the atmosphere might be expected to reduce over thousands of years, but 14 C is constantly being produced in the lower stratosphere and upper troposphereprimarily by galactic cosmic raysand to a lesser degree by solar cosmic rays. Animals, in turn, consume this carbon when they eat plants, and the carbon spreads through the food cycle. InLibby moved to the University of Chicago where he began his work on radiocarbon dating.
The scientists who were trying to build the chronology found the tree rings so ambiguous that they could not decide which rings matched which using the bristlecone pine.
Thanks to Fossil Fuels, Carbon Dating Is in Jeopardy. One Scientist May Have an Easy Fix
They use tree rings as the calibration standard. Talk of circular reasoning!!!! Carbon is a stable isotope, meaning its amount in any material remains the same year-after-year, century-after-century. Chronostratigraphy Geochronology Isotope geochemistry Law of superposition Luminescence dating Samarium—neodymium dating. If something carbon dates at 7, years we believe 5, is probably closer to reality just before the flood.