Tree rings are used to calibrate radiocarbon measurements. Calibration is necessary to account for changes in the global radiocarbon concentration over time. Results of calibration are reported as age ranges calculated by the intercept method or the probability method, which use calibration curves. The internationally agreed calibration curves for the period reaching as far back as BC are those produced by PJ Reimer et al. Calibration curves have a dendro timescale on the x-axis and radiocarbon years on the y-axis. Calibration is not only done before an analysis but also on analytical results as in the case of radiocarbon dating —an analytical method that identifies the age of a material that once formed part of the biosphere by determining its carbon content and tracing its age by its radioactive decay.
Full details and references can be found there. Basic Concepts of Dendrochronology The science of constructing chronologies from tree rings is called dendrochronology. The basic concepts involved are not complex. Modern trees are known to produce one growth ring per year.
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Challenges to Biblical Credibility. Gone are the romantic images of gentlemen in pith helmets carting off treasures to the museums and estates of Europe. Gone, too, is the idea that archaeologists are always on the side of the Bible believer.
Relationships between corrected and published ages of specimens in years since death Whitelaw, , p. However, the difference between production and decay rates, and the systematic discrepancy between radiocarbon and tree-ring dates, refute this assumption. Instead, the evidence for change is entirely consistent with a recent Creation and catastrophic Flood. Some creationists have used this information to model a biblically consistent version of the radiocarbon method.
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