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Posted by / 25-Oct-2020 11:18

Relative chemical dating

The chances of fossilization are very slim, because it requires that the remains be quickly buried and be kept in an oxygen-free environment.

Scavenger and bacterial activity must be prevented so that decomposition is limited.

Absolute dating uses chemical and physical processes to provide a date range for an object, fossil, or site.

Absolute methods include radiometric and non-radiometric methods.

Non-radiometric methods utilize other processes to assess a date.

Non-radiometric methods include dendrochronology, or tree-ring dating, amino acid dating, fission track, paleomagnetic dating, electron spin resonance, and luminescence.

In addition, local climatic and environmental conditions determine whether fossilization will occur, so that there is differential preservation among different locations.

Moreover, the rock sequences are not always complete in all places, so certain periods cannot be investigated.

Relative methods include stratigraphic correlation, which matches strata from different sites that are temporally comparable.Radiometric methods, such as radiocarbon dating and radiopotassium dating utilize the regular radioactive decay of isotopes from one form to another.Measuring the ratio of the two forms provides date information.The other method is “Relative Dating” which gives an order of events without giving an exact age (1): typically artefact typology or the study of the sequence of the evolution of fossils.There are three carbon isotopes that occur as part of the Earth's natural processes; these are carbon-12, carbon-13 and carbon-14.

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This law is the important for stratigraphic dating, because fossils, bones, or other objects incorporated into these layers can be compared to each other to determine relative ages.

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