Argon argon dating method
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Dating, in geology, determining a chronology or calendar of events in the history of Earth, using to a large degree the evidence of organic evolution in the sedimentary rocks accumulated through geologic time in marine and continental environments.
But since floods jumble materials of different origins and ages together, that meant the scientists had to date dozens of different minerals.
Argon-argon dating gets around many of the issues by measuring only multiple isotopes of argon.
Although with clever detective work many complex time sequences or relative ages can be deduced, the ability to show that objects at two separated sites were formed at the same time requires additional information.