Carbon 14 dating seal
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Tree rings provided truly known-age material needed to check the accuracy of the carbon-14 dating method.
During the late 1950s, several scientists (notably the Dutchman Hessel de Vries) were able to confirm the discrepancy between radiocarbon ages and calendar ages through results gathered from carbon dating rings of trees.
The science of dendrochronology is based on the phenomenon that trees usually grow by the addition of rings, hence the name tree-ring dating.
Dendrochronologists date events and variations in environments in the past by analyzing and comparing growth ring patterns of trees and aged wood.
Suess’s curve, based on the bristlecone pine, used tree rings for its calendar axis.
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In principle, the age of a certain carbonaceous sample can be easily determined by comparing its radiocarbon content to that of a tree ring with a known calendar age.In later years, the use of accelerator mass spectrometers and the introduction of high-precision carbon dating have also generated calibration curves.
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