Is radiometric age dating accurate datinglincoln com
Thus the physical principle of the method is well established. The dates obtained by radiometric dating are verified by independent methods, including dendrochronology (tree rings), varve chronology (sediment layers), ice cores, coral banding, speleotherms (cave formations), fission track dating, and electron spin resonance dating.
Results from different techniques, often measured in rival labs, continually confirm each other.For dating back to about 35,000 years, sediment layers are precise. Sediments include different types of pollen depending upon the season.Consequently, individual years can be identified by season, so there is no possibility of layers being confused.C14 is continually being created and decaying, leading to an equilibrium state in the atmosphere.When the carbon dioxide, containing C14 as well as stable C12 and C13, is taken in by plants it is no longer exposed to the intense cosmic ray bombardment in the upper atmosphere, so the carbon 14 isotope decays without being replenished.