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Radioactive chronologies. Scientists know that there are geological events that can disturb the zircon and release the lead created from the uranium. Third, zircon is widespread in igneous rocks as a primary mineral. The last of the benefits is that the zircon, itself, is very hard. Radiometric Dating Methods: Namespaces Article Talk. With modern techniques, these ranges have gotten narrower and narrower, and consequently, even very ancient rocks can be dated quite precisely.

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The reason for stopping at lead is because lead is not radioactive and will not change into a different element.

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Uranium-thorium-lead dating

Using such techniques, scientists can very accurately date ancient volcanic events and can extrapolate from these dates to learn about the ages of other rock strata. The Wikibook Historical Geology has a page on the topic of: Hence, carbon dating can only be used to estimate much younger ages, up to around 60, years. With modern techniques, these ranges have gotten narrower and narrower, and consequently, even very ancient rocks can be dated quite precisely. Print this article Print all entries for this topic Cite this article. This age is in good agreement with the age of the meteorites and the age of the Moon as determined independently. Community College of Baltimore County.

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