How acurate is radom carbon dating
Also, oak trees and bristlecone pine or Douglas fir trees are very different.
Bristlecones, for example, are evergreens which grow very slowly, at high altitude, in a cold, arid environment, and live for thousands of years.
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.
If the science of dendrochronology was characterized by significant random error, the American and European tree-ring chronologies would certainly disagree with each other.
If the method had a large component of random error due to inaccurate pattern matching, how could such detailed agreement between the radiocarbon in the rings of two independent dendrochronologies be possible?
The pattern of radiocarbon in the rings showed a maximum divergence, even at very old ages, of only around 40 years.
This objective, quantitative test of dendrochronology showed it to be reliable and accurate.
This allows different dendrochronologies to be compared over multiple years to see if they show the same pattern of radiocarbon fluctuations.
Early in the history of the science of dendrochronology, a tree-ring chronology using bristlecone pines from the White Mountains of California was developed.