What does radiocarbon dating do

what does radiocarbon dating do

By using wood samples from trees once buried under glacial ice, Libby proved that the last ice sheet in northern North America receded 10, to 12, years ago, not 25, years as geologists had previously estimated. The method is now used routinely throughout archaeology, geology and other sciences to determine the age of ancient carbon-based objects that originated from living organisms. For example, if a series of radiocarbon dates is taken from different levels in a stratigraphic sequence, Bayesian analysis can be used to evaluate dates which are outliers, and can calculate improved probability distributions, based on the prior information that the sequence should be ordered in time. Radiocarbon activity of materials in the background is also determined to remove its contribution from results obtained during a sample analysis.

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For this discovery, Libby received the Nobel Prize in Chemistry in

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