What do the units mean in the following sentence? The median sample-age difference is 14 cal. yr for the period 9175-11 625 cal. yr BP. The chronology is based on 57 AMS radiocarbon dates. cal; BP;

Jada Chang

What do the units mean in the following sentence? The median sample-age difference is 14 cal. yr for the period 9175-11 625 cal. yr BP. The chronology is based on 57 AMS radiocarbon dates. cal; BP; AMS

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cal BP = calibrated years before the present AMS = Accelerator Mass Spectrometry Sources: http://archaeology.about.com/b/2008/07/09/faq-what-does-cal-bp-mean.htm http://archaeology.about.com/od/amthroughanterms/g/ams_radiocarbon.htm

Yes Fermi is a famous physicist. I guess he is Italian :P

radiocarbon dating is pretty well described here: http://en.wikipedia.org/wiki/Radiocarbon_dating (by the way I am delighted to see also the name of Enrico Fermi in the matter)

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