What is radioactive dating of fossils

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Any geologic feature that cross-cuts across strata must have formed after the rocks they cut through were deposited. Radiometric dating is a technique used to date materials such as rocks or carbon, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates. Different methods of radiometric dating can be used to estimate the age of a variety of natural and even man-made materials. About the Author. It is accompanied by a sister process, in which uranium decays into protactinium, which has a half-life of 32, years.

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Potassium—argon dating.

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Dating Rocks and Fossils Using Geologic Methods

The amount of time it takes for half of the parent isotopes to radioactively decay to daughter isotopes. Meteoritics and Planetary Science. Together with stratigraphic principles, radiometric dating methods are used in geochronology to establish the geological time scale. Biostratigraphy enables scientists to match rocks with particular fossils to other rocks with those fossils to determine age. Radiometric dating is also used to date archaeological materials, including ancient artifacts. Busfield; C.

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