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rubidium-strontium dating

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rubidium-strontium dating
n
(Physics / General Physics) a technique for determining the age of minerals based on the occurrence in natural rubidium of a fixed amount of the radioisotope 87Rb which decays to the stable strontium isotope 87Sr with a half-life of 4.7 ✕ 1011 years. Measurement of the ratio of these isotopes thus gives the age of a mineral, for ages of up to about 4 ✕ 109 years
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Noun1.rubidium-strontium dating - geological dating based on the proportions of radioactive rubidium into its decay product strontium; radioactive rubidium has a half-life of 47,000,000,000 years
dating, geological dating - use of chemical analysis to estimate the age of geological specimens


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