Carbon dating super

Carbon-14 dating does not produce ages in the millions of years, as do some other types of radioisotope dating.C dating consists of measuring the amounts of carbon-14 and carbon-12, and sometimes C-13, in a sample.While the small variations in isotope decay that have been reported may not invalidate all isotopic dating, they raise questions about the assumption of completely uniform decay rates.A second assumption is that the sample being dated has not experienced any loss or contamination of C over its history.Carbon-14 dates usually appear to be reasonably accurate whenever they can be checked against historical records.For example, when the Dead Sea Scrolls were dated, three methods could be used: 1) Dates written in the documents themselves (like the date at the start of a letter) 2) Paleography, which uses the style of script used to write documents to date them, and 3) Carbon-14.In most cases, the three methods produced similar results.Surprisingly, in at least one case the date range given by There may be other examples of systematic variation in isotope decay rates.

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This can be done very accurately, although some samples may be difficult to work with.Beyond this, the accuracy of the date depends on the reliability of the assumptions used in interpreting the measurements (see below).

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