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It is also called “radiocarbon” because it is unstable and radioactive relative to carbon-12 and carbon-13.
Carbon consists of 99% carbon-12, 1% carbon-13, and about one part per million carbon-14.
I also supply several links to other very useful pages concerning tree-ring dating from where educators can obtain additional background informations.
Constructed by Lori Martinez, Laboratory of Tree-Ring Research, The University of Arizona, Tucson, AZ 85721.
Additionally, the site you are trying to access has components that require Adobe Flash Player 9.0 or higher.As a tree grows, it produces new layers of wood around the trunk, just under the bark.If a tree is cut down, the layers are visible in a cross section.Dendrochronology or tree-ring dating is the scientific method of dating using the annual nature of tree growth in suitable tree species.
Dendrochronology allows the exact calendar year in which each tree rings was formed to be established enabling the precise dating of trees and timbers.These pages are divided into several major categories that should answer some of the more common questions regarding dendrochronology.