Problems with carbon 14 dating method

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Libby, the discoverer of the C14 dating method, was very disappointed with this problem.

He understood that archaeological artifacts were readily available.

These two measures of time will only be the same if all of the assumptions which go into the conventional radiocarbon dating technique are valid.

Comparison of ancient, historically dated artifacts (from Egypt, for example) with their radiocarbon dates has revealed that radiocarbon years and calendar years are not the same even for the last 5,000 calendar years.

Some organic materials do give radiocarbon ages in excess of 50,000 "radiocarbon years." However, it is important to distinguish between "radiocarbon years" and calendar years.

by Helen Fryman Question: What about radiocarbon dating? Response: I asked several people who know about this field. (1.) C14 dating is very accurate for wood used up to about 4,000 years ago.

This is only because it is well calibrated with objects of known age.

Various geologic, atmospheric and solar processes can influence atmospheric carbon-14 levels.

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Since the 1960s, scientists have started accounting for the variations by calibrating the clock against the known ages of tree rings.

By measuring the ratio of the radio isotope to non-radioactive carbon, the amount of carbon-14 decay can be worked out, thereby giving an age for the specimen in question.

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