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Clearly, various centers of civilization arose independently of one another even if the Near Eastern one remains the oldest on record.
The K-Ar and uranium decay series are used in dating older objects see Radiometric dating. However laboratories continue to use the Libby figure to avoid confusion. It has been noted that the plateau itself can be used as a time marker when it appears in a time series.
It is known that half-life of radiocarbon is years. The level is maintained by high energy particles interacting with the earth's upper atmosphere, which may be affected by changes in the earth's magnetic field or in the cosmic ray background, e. The accuracy of radiocarbon dating is lower for samples originating from such plateau periods. Therefore, the notion that the ancient Near East was the fount of global human civilization can no longer hold true.
For more accurate work, the temporal variation of the cosmic ray flux can be compensated for with calibration curves. It cause that the one radiocarbon year does not equal one calendar year. Carbon dating labs generally report an uncertainty, e. If these curves are used, their accuracy and shape will be the limiting factors in the determination of the radiocarbon age range of a given sample. Libby vs Cambridge half-life Carbon dating was developed by a team led by Willard Libby.
When cosmic rays enter the atmosphere, they undergo various transformations, including the production of neutrons. Carbon dioxide also permeates the oceans, dissolving in the water. Such wood, turned into an artifact some time after the death of the tree, will reflect the date of the carbon in the wood.
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