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After yet another 5,730 years only one-eighth will be left.

By measuring the carbon-14 in organic material, scientists can determine the date of death of the organic matter in an artifact or ecofact.

An additional problem with carbon-14 dates from archeological sites is known as the "old wood" problem.

Potassium is common in rocks and minerals, allowing many samples of geochronological or archeological interest to be dated.Learn about different types of radiometric dating, such as carbon dating.Understand how decay and half life work to enable radiometric dating.For example, techniques based on isotopes with half lives in the thousands of years, such as Carbon-14, cannot be used to date materials that have ages on the order of billions of years, as the detectable amounts of the radioactive atoms and their decayed daughter isotopes will be too small to measure within the uncertainty of the instruments.One of the most widely used and well-known absolute dating techniques is carbon-14 (or radiocarbon) dating, which is used to date organic remains.One of the most widely used is potassium–argon dating (K–Ar dating).

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