Radiocarbon dating to

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These are the basis for the calibrations performed by the programs like CALIB and Ox Cal. Calibration of radiocarbon determinations is in principle very simple.If you have a radiocarbon measurement on a sample, you can try to find a tree ring with the same proportion of radiocarbon.

By using these widths, it is possible to compare the tree rings in a dead tree to those in a tree that is still growing in the same region.These values should correspond exactly to normal historical years BC and AD.The term cal BP means the number of years before 1950 and can be directly compared to calendar years.There are two main methods used for calculating age ranges from the calibration curve: The first method to be employed was called the `intercept method' because it can be done by drawing intercepts on a graph.This method will tell you the years in which the radiocarbon concentration of tree rings is within two standard deviations of your measurement (e.g.

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