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radiometric dating
(redirected from Radiometrically dated)

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radiometric dating [‚rād·ē·ə‚me·trik ′dād·iŋ]
(archeology)
A dating method that utilizes the radioactive decay of certain long-lived, naturally occurring parent isotopes to stable daughter isotopes.
(nucleonics)
A technique for measuring the age of an object or sample of material by determining the ratio of the concentration of a radioisotope to that of a stable isotope in it; for example, the ratio of carbon-14 to carbon-12 reveals the approximate age of bones, pieces of wood, and other archeological specimens. Also known as isotopic age determination; nuclear age determination; radioactive age determination; radioactive dating; radiogenic age determination; radiogenic dating.
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2 million years old and attributed to the early human species Australopithecus afarensis, the Ngare Sero footprints are pressed into an ash layer that has been radiometrically dated to be approximately 120,000 years old.
Scientists may have discovered Homo sapiens' oldest known trackways ... by Asian News International
These minerals can be radiometrically dated because they decompose at a measurable rate and serve as an accurate historical clock.
Skull shocker: a 7-million-year-old skull has scientists asking "who ... by Masibay, Kim Y. / Science World
 
 
 
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