The upper atmosphere, nitrogen, and the bombard of cosmic radiation results in a known proportion of radioactive carbon which is incorporated into atmospheric carbon dioxide.
The occurs absorption of CO2 by vegetation and thence by animal tissues.
This allows the establishment of the relative position of the specimen in the geological, climatic, faunal and archaeological sequence.
Absolute dating implies chronometry and is the oldest method in use.
Despite the length of time these questions have been considered, there is still relatively little general agreement on the interpretation of this Late Pleistocene fossil and cultural evidence.With regard to uranium mineral phosphates, including bones, all contain uranium. Also the determination of morphological evidence in terms of the hominid phylogeny.Also the correct ecological information of the sites. Firstly the relationship of geological, faunal, archaeological sequences at the site in terms of chronological age in years BP.The of a skull or mandible is usually obtained indirectly when it comes from a deposit containing more suitable for radiocarbon dating.Contemporaneity is not always justifiable due to mankind’s long established practices of burying the dead.This shows also contemporaneity of hominid bones and animal bones buried at the same site.Nitrogen decreases in buried bone and affects nitrogen concentrations. With regard to relative dating Comparative geology includes correlations with soil pollen content.Secondly, the remains have to have contemporaneity with deposits.The association of faunal, climatic and archaeological information derived from the site can be the same as the specimen. To determine contemporaneity evidence is required to show there is no unnatural disturbance of the specimen, no intrusive burial, and no derivation from older deposits.Some bones that appear to be well fossilised do in fact contain considerable amounts of protein.can be determined by comparison of the contents that include nitrogen, carbon, and chemically bound water.