High-precision measurement of dendrochronologically dated Irish oak at bi-decade/decade intervals has continued in the Belfast laboratory, extending the 14 C data base from ca AD 1840 to 5210 BC. The dendrochronology is now considered absolute (see Belfast dendrochronology this conference) (Brown et al , 1986) and a continuous detailed curve is presented, showing the natural variations in the atmospheric concentration of 14 C over >7000 years. Each data point has a precision of <2.5., and some 4500 years have now been compared with Seattle, giving excellent agreement. Discussion of this data base and the justification of the claimed accuracy is given together with a comparison of other chronologies. Some of the advantages and limitations of the above are discussed.
No takes yet. Share an insight, caveat, or question.
Pearson et al. (1986) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: