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- 17.6: Radiocarbon Dating: Using Radioactivity to Measure the Age of Fossils and Other Artifacts
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When we speak of the element Carbon, we most often refer to the most naturally abundant stable isotope 12 C.
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In this section we will explore the use of carbon dating to determine the age of fossil remains. - Radiometric dating , radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon , in which trace radioactive impurities were selectively incorporated when they were formed.
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17.6: Radiocarbon Dating: Using Radioactivity to Measure the Age of Fossils and Other Artifacts
TEACHING THE MATHEMATICS OF RADIOMETRIC DATING. James H. Shea. Geology Department, University of Wisonsin - Parkside, Box number
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Radiometric dating, often called radioactive dating, is a technique used to determine the age of materials such as rocks. It is based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates. It is the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and it can be used to date a wide range of natural and man-made materials.
Archaeologists use the exponential, radioactive decay of carbon 14 to estimate the death dates of organic material. The stable form of carbon is carbon 12 and the radioactive isotope carbon 14 decays over time into nitrogen 14 and other particles. Carbon is naturally in all living organisms and is replenished in the tissues by eating other organisms or by breathing air that contains carbon. At any particular time all living organisms have approximately the same ratio of carbon 12 to carbon 14 in their tissues. When an organism dies it ceases to replenish carbon in its tissues and the decay of carbon 14 to nitrogen 14 changes the ratio of carbon 12 to carbon