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放射性年代測定

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Example of a radioactive decay chain from lead-212 (212Pb) to lead-208 (208Pb) . Each parent nuclide spontaneously decays into a daughter nuclide (the decay product) via an α decay or a β− decay. The final decay product, lead-208 (208Pb), is stable and can no longer undergo spontaneous radioactive decay.

放射性年代測定の仕組みと地質学的応用

放射性年代測定同位体半減期炭素14
Geologic time scale proportionally represented as a log-spiral. The image also shows some notable events in Earth's history and the general evolution of life.

地質年代学地球46億年の歴史を刻む時間尺度

地質年代地層年代測定層序学