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Views: 32625 | Post Uploader: TheFairy | Categories: Fat A much larger effect comes from above-ground nuclear testing, which released large numbers of neutrons and created 14 C. The Holocene , the current geological epoch, begins about 11, years ago, when the Pleistocene ends. To produce a curve that can be used to relate calendar years to radiocarbon years, a sequence of securely dated samples is needed which can be tested to determine their radiocarbon age. The calculations to be performed on the measurements taken depend on the technology used, since beta counters measure the sample's radioactivity whereas AMS determines the ratio of the three different carbon isotopes in the sample. Memoirs of the Society for American Archaeology 8: Retrieved 2 February

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