Carbon dating for idiots
Modern methods can detect essentially any Carbon-14, and therefore produce dates up to about 100,000 years.
Beyond this, there is essentially no Carbon-14 left, so any age larger than that can not be determined.
Jericho is just one example of the discrepancy between historical and C14 dates for the second millennium B. C14 dates are consistently 100–150 years earlier than historical dates.
is based on pottery, which, in turn, is based on Egyptian chronology.
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So by measuring the C-14 level we work out how many half lives old the sample is and therefore how old it is.Carbon-14 makes up about 1 part per trillion of the carbon atoms around us, and this proportion remains roughly constant due to continual production of carbon-14 from cosmic rays.
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