Response: I asked several people who know about this field. Their responses are numbered below. C14 dating is very accurate for wood used up to about 4, years ago. This is only because it is well calibrated with objects of known age. Example: wood found in a grave of known age by historically reliable documents is the standard for that time for the C14 content. This standard content of C14 can then be used for wood not associated with a historically documented date.
Bristlecone Pines And Tree-Ring Dating: A Critique
Tree Rings and Biblical Chronology | The Institute for Creation Research
Dendrochronology or tree-ring dating is the scientific method of dating tree rings also called growth rings to the exact year they were formed. As well as dating them this can give data for dendroclimatology , the study of climate and atmospheric conditions during different periods in history from wood. Dendrochronology is useful for determining the precise age of samples, especially those that are too recent for radiocarbon dating , which always produces a range rather than an exact date. However, for a precise date of the death of the tree a full sample to the edge is needed, which most trimmed timber will not provide. It also gives data on the timing of events and rates of change in the environment most prominently climate and also in wood found in archaeology or works of art and architecture, such as old panel paintings. It is also used as a check in radiocarbon dating to calibrate radiocarbon ages. New growth in trees occurs in a layer of cells near the bark.
Tree Rings and Biblical Chronology
Debater Bill Nye recently used these tree studies to challenge the biblical timeline. How can a researcher determine which rings truly represent whole years? Researchers often crossdate trees to build a better chronology or history. Any analysis that does not employ rigorous, replicable crossdating is not dendrochronological [tree-ring dating] in nature: counting rings does not afford the comparative validation necessary to produce absolutely dated ring sequences. But even crossdating does not always work.
Several species of trees live almost indefinitely. The giant sequoia trees of California are known to live over 3, years, discerned through tree ring dating. Under normal circumstances, woody trees add one ring per year. A ring typically consists of a light-colored growth portion and a dark-colored portion produced in a stabilization season.