Posted: Jan 02, 2013 7:48 pm
by andre
Maybe a little contribution to this excellent thread. I searched for "calibration" but didn't find it in the context of 14C dating.

There has been a whole lot of issues on the accuracy of 14C dating. Nowadays we seem to have a quite robust calibration scale, INTCAL09 after numerous comparisons with annually countable layers/rings like treerings (dendrochronology), annual coral grow rings, annual lake deposit layers (varves), which validates the method well within 5%.

On the other hand, there seems to be a problem with not-so-constantly logaritmic beta decay.