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Absolute dating(also known as radiometric dating) is based by the measurement of the content of specific radioactive isotopes of which the "half time" is known.

Half time is the time needed for half of a given quantity of an isotope to decay in its byproducts.

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( New Scientist Nov 10 1983 page 425 Both absolute dating and relative dating are determined by the evolutionary timeline and are used to support the evolutionary timeline.

( The rocks do not date the fossils the fossils date the rocks American Journal of Science Jan 1976 47-55) Absolute dating is based on radioactivity.

This is based on the concept that, in a normal depositionary sequence, the deepest layers are also the oldest.

absolute dating is based on calculations of the age of rock strata based on half lives of minerals, relative dating is based on the assumed age of fossils found in the strata and the laws of super imposition. The absolute dating is based on calculation of half life.

The absolute dating refers to a technique used to determine the exact age of the artefact or a site using methods such as carbon dating while relative dating refers to a technique used to determine which object or item is older in comparison to the other one.

Absolute dating determines the numerical age while relative dating arranges the fossils in an order.

It is a less advanced technique when compared to absolute dating.

Some methods used in relative dating are stratigraphy, biostratigraphy, and cross dating.

The four methods involved in absolute dating are radiometric dating, amino acid dating, dendrochronology, and thermoluminescence while biostratigraphy, stratigraphy, and cross dating are involved in the relative dating.

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