Definition relative dating science

28-Sep-2020 05:15

definition relative dating science-80

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This Science Struck post enlists the differences between the absolute and relative dating methods.Geological specimens that are unearthed need to be assigned an appropriate age.For inorganic materials, such as rocks containing the radioactive isotope rubidium, the amount of the isotope in the object is compared to the amount of the isotope's decay products (in this case strontium).The object's approximate age can then be figured out using the known rate of decay of the isotope.As an example Pinnacle Point's caves, in the southern coast of South Africa, provided evidence that marine resources (shellfish) have been regularly exploited by humans as of 170,000 years ago.

If one knows how much of this radioactive material was present initially in the object (by determining how much of the material has decayed), and one knows the half-life of the material, one can deduce the age of the object.It was the case of an 18th-century sloop whose excavation was led in South Carolina (United States) in 1992.

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