Radiometric dating
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The time in the history of the Earth determined by a dating method that uses the half-lives of radioactive elements. This method is particularly useful for dividing rocks into Precambrian periods, when there are few fossils, because it is performed directly on rocks. Source : Heibonsha Encyclopedia About MyPedia Information |
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放射性元素の半減期を利用する年代測定法で定められた地球の歴史の時間。この方法は岩石を直接の対象として行うため，化石の少ない先カンブリア時代の区分には特に有効である。
出典 株式会社平凡社百科事典マイペディアについて 情報 |
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