Carbon dating change 2016

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While the exchange of inorganic carbon occurs much more readily, the relative chemical inertness of biopolymers makes them ideal for dating; therefore, the majority of bone radiocarbon dates are obtained from the collagen phase.

Analyses of museum specimens collected alive before atmospheric nuclear testing suggest that the standard reservoir correction for marine samples is appropriate for middle to lower Chesapeake Bay.In effect, they provide us with windows to past societies, and contribute to our knowledge of ancient human evolution and cultural development.Hard tissues contain an organic phase (mainly the protein collagen type I) embedded in a mineral phase (made of a non-stoichiometric biogenic apatite).Carbon in these sediments is a complex mixture of materials from a variety of sources.Analyses of different components of the sediments show that total organic carbon ages are largely unreliable, because much of the carbon (including coal) has been transported to the bay from upstream sources and is older than sediments in which it was deposited.

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