Description: Currently you are watching Radiometric dating contamination porn video uploaded to: Schoolgirl porn category. You can find more videos like Radiometric dating contamination below in the related videos section. Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon , in which trace radioactive impurities were selectively incorporated when they were formed. The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay. Together with stratigraphic principles , radiometric dating methods are used in geochronology to establish the geologic time scale. By allowing the establishment of geological timescales, it provides a significant source of information about the ages of fossils and the deduced rates of evolutionary change. Contaminants of samples for radiocarbon dating can be natural or artificial. Physical pretreatment methods remove contaminants without using chemicals.
Added: 10.03.2019 at 12:15
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