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Radiometric age dating definition

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Related to radiometric dating: Carbon 14 dating. A method for determining the age of an object based on the concentration of a particular radioactive isotope contained within it and the half-life of that isotope. All rights reserved. Also called: radioactive dating. Copyright , , by Random House, Inc.
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Definition of radiometric dating

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Radioisotope Dating Definition - Radiometric dating

Geologists often need to know the age of material that they find. They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years. This is different to relative dating, which only puts geological events in time order. Most absolute dates for rocks are obtained with radiometric methods.
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Radiometric dating

Radiometric dating calculates an age in years for geologic materials by measuring the presence of a short-life radioactive element, e. The term applies to all methods of age determination based on nuclear decay of naturally occurring radioactive isotopes. Bates and Jackson To determine the ages in years of Earth materials and the timing of geologic events such as exhumation and subduction, geologists utilize the process of radiometric decay. Geologists use these dates to further define the boundaries of the geologic periods shown on the geologic time scale. Radiometric decay occurs when the nucleus of a radioactive atom spontaneously transforms into an atomic nucleus of a different, more stable isotope.
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