Sidebar [Skip]. Molecular clock. Accuracy levels of within twenty million years in ages of two-and-a-half billion years are achievable. What best describes you? Plant Reproduction Bowring; H. Keep playing.
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Radiometric Dating: Methods, Uses & the Significance of Half-Life
It is accompanied by a sister process, in which uranium decays into protactinium, which has a half-life of 32, years. This in turn corresponds to a difference in age of closure in the early solar system. Depending on which text editor you're pasting into, you might have to add the italics to the site name. Cambridge Univ. Zircon has a very high closure temperature, is resistant to mechanical weathering and is very chemically inert. Accurate radiometric dating generally requires that the parent has a long enough half-life that it will be present in significant amounts at the time of measurement except as described below under "Dating with short-lived extinct radionuclides"the half-life of the parent is accurately known, and enough of the daughter product is produced to be accurately measured and distinguished from the initial amount of the daughter present in the material. This process by which an unstable atomic nucleus loses energy by releasing radiation is called radioactive decay.