Argon argon dating accuracy
Since carbon dating depends upon variable cosmic ray intensity, a calibration curve is assumed to be applied to account for that.The actual accuracy of radiometric dating is about 2%, but there is no point in splitting hairs for this debate as to whether it is 2% or 3%.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.Measuring the ratio of C14 to C12 and C13 therefore dates the organic matter for periods back to about eight half-lives of the isotope, 45,000 years.Why would an error in radiometric dating correspond to errors in the other methods so that they all track?In fact, they track because radiometric data is accurate.An error of 90% would, for example, still disprove Young Earth Creationism.There are three reasons why radiometric data is known to be accurate: 1.
Argon/argon dating works using only the ratio of the concentration of the argon isotopes. For the purposes of this debate, "accurate" means that 95% of the dating errors are within 10% of the measured date, within the time span for which the isotope pair is utilized.
Consequently, individual years can be identified by season, so there is no possibility of layers being confused.