Calculating The Age
The age of a sample is determined by analysing several minerals within the sample. The 87Sr/86Sr ratio for each sample is plotted against its 87Rb/86Sr ratio on a graph called an isochron. If these form a straight line then the samples are consistent, and the age probably reliable. The slope of the line dictates the age of the sample.
Read more about this topic: Rubidium-strontium Dating
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