The beads, the color and size of blueberries, were uncovered in a house pit in Punyik Point, a seasonal Inuit camp near the Continental Divide in Alaska's Brooks Range. Archaeologists determined the objects were created between and following a radiocarbon-dating of twine that held the jewelry. According to the study, the new discovery resets the clock on when traded began between Europe and North America. Kunz theorizes the baubles were just small piece of a number of trinkets that made their way various trade routes that began in Europe, then along the Silk Road to China, through Siberia and finally across the Bering Strait. They were then presumably brought across the frigid Arctic Ocean to Alaska by kayak. Punyik Point was a popular stopping point for traders, Kunz says, because of the many caribou in the area.
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Radiocarbon WebInfo - AMS
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Myths Regarding Radiocarbon Dating
Historical Version s - view previous versions of standard. Work Item s - proposed revisions of this standard. More D
Despite the name, it does not give an absolute date of organic material - but an approximate age, usually within a range of a few years either way. There are three carbon isotopes that occur as part of the Earth's natural processes; these are carbon, carbon and carbon The unstable nature of carbon 14 with a precise half-life that makes it easy to measure means it is ideal as an absolute dating method. The other two isotopes in comparison are more common than carbon in the atmosphere but increase with the burning of fossil fuels making them less reliable for study 2 ; carbon also increases, but its relative rarity means its increase is negligible. The half-life of the 14 C isotope is 5, years, adjusted from 5, years originally calculated in the s; the upper limit of dating is in the region of , years, after which the amount of 14 C is negligible 3.