最終更新日：2024/08/02

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(attributive) Designating a method of geological dating based on the relative amounts in rock of rubidium-87 and its beta-decay product, strontium-87.

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rubidium-strontium

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rubidium-strontium

noun

Rubidium-strontium isotope dating is used to determine the age of rocks.

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Isotopic dating of meteorites using the rubidium-strontium system and others indicates that the most primitive rocks in the solar system are 4.56 billion years old, determined rather precisely.

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rubidium-strontium

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