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know that radioactive decay involves atoms changing to different atoms.
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After spending a few days trying to adjust to the fact that the handsome co-leader of my small group was seven years my junior, I had just realized that he was actually eight years younger!
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These can not be included in the diagram for practical reasons, but can be found in Harland , 1990, along with a detailed description of the history of earlier-proposed time scales and the terminology, methodology and data involved in constructing this geological time scale.
Because of continual refinement, none of the values depicted in this diagram should be considered definitive, even though some have not changed significantly in a long time and are very well constrained (e.g., the Cretaceous/Tertiary boundary has been at 65 -1 Ma for decades, and has been tested innumerable times, with almost all dates somewhere between 64 and 66 million years).
be determined through radiometric age dating or absolute age dating .
Age- dating rocks involves counting atoms and comparing the counts.
1.5 and 1.6 of Harland ) and a few numerical estimates were available previously (but often for the duration of the entire scale rather than its individual subdivisions).Tags: Adult Dating, affair dating, sex dating