Radiocarbon dating and the old wood problem Sheffield girls chat sex
This may be the result of growth age; in which the age of dead wood in the centre of the living tree is dated, or storage age; which refers to the amount of time elapsed from the death of the tree to its use by people (Mc Fadgen, 1982).
Inbuilt age may result in errors of up to hundreds of years unless only short-lived species, or twigs, are selected for dating.
Thus excavators look to post holes, pits, or find spots under the orthostats for clues to construction dates.
Attaching any error to charcoal dating using old wood is obviously impossible, since it is non-systematic.Even then, there remains an inbuilt age effect, albeit somewhat reduced.In the late 1950's, the issue of presample age was identified as a causal factor in the difficulties encountered in accurately cross-dating the Julian calendar with that of the Yucatan Maya of Lowland Mexico.In the case of dating megalithic tombs, indirect evidence for the age of the tomb must always be obtained, because stone (or the time of moving a stone) can not be dated.When a number of objects are recovered from one deposit, the terminus post quem is based on the dating from the 'youngest' find.