The outstanding example of radiocarbon age at 'death'(or more usually felling) is wood.
In addition to determining the radiocarbon 'age', the laboratory must estimate the uncertainty on the experimental measurement.
Since there is no theoretical way of predicting the correction factor, empirical calibration curves were needed to link radiocarbon 'age' with known age.
These younger radiocarbon ages permitted a possible a link to the 1700 Cascadia earthquake.
When radiocarbon ages are combined - especially in instances where samples do not come from the same part of one organism - problems can arise.
The fourth settlement down shows a radiocarbon age of eighty-three hundred years, plus or minus a hundred.
The correlations are based on radiocarbon ages and subsurface stratigraphic methods.
Archaeologists' most precise determinations at present suggest that this radiocarbon age is equal to roughly 13,500 to 13,000 calendar years ago.
A raw radiocarbon age, once calibrated, yields a calendar date.
After replacing values, the raw radiocarbon age becomes any of the following equivalent formulae:
