Dendrochronology and radiocarbon dating Hookup portal videos
But for the specimen to be useful in extending the tree-ring chronology, the absolute calendar age of its rings must be determined.
The annual growth rings vary in thickness each year depending on environmental factors such as rainfall.
Tree-ring chronologies have been extended to 10,000 years before present in this way.
Generally, it is not possible to construct a complete sequence of tree rings back through the historical periods using only living trees.
Chronologies derived from living trees must be extended.
If the science of dendrochronology was characterized by significant random error, the American and European tree-ring chronologies would certainly disagree with each other.
In fact, a comparison of the European and American chronologies showed very close correlation.