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Following the death of an organism, any exchange ceases and the carbon 14, which is radioactive and therefore unstable, slowly begins to disintegrate at a known rate (half-life of 5730 years, ie, after this period only half of the total carbon 14 present at the time of death remains).The amount of carbon 14 remaining in the material to date is compared to a reference standard (ratio 14C/total carbon, 12C and 13C) to calculate the time elapsed since its occurrence.These present many characteristics that are used for comparing them, such as morphology and raw materials in the case of stone tools, and decorative techniques and motifs in the case of ceramics.

absolute and relative dating-27absolute and relative dating-14

There are no temporal limits to relative dating, for the methods are equally applicable to the dating, say, of Proterozoic surfaces as of those of Pleistocene age.The dating of land surfaces has long posed problems for geomorphologists.Relative methods (stratigraphic, geomorphic, topographic) are sound and convincing.Relative dating includes different techniques, but the most commonly used are soil stratigraphy analysis and typology.On the other hand, absolute dating includes all methods that provide figures about the real estimated age of archaeological objects or occupations.

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