Example of radiometric dating

Increasingly, the other techniques are used, such that probably no one technique dominates for meteorite dating.

"The idea that Rb-Sr is the most used chronometer for meteorites is largely based on work done 10-30 years ago.Note that, contrary to a popular misconception, carbon dating is not used to date rocks at millions of years old.Before we get into the details of how radiometric dating methods are used, we need to review some preliminary concepts from chemistry.After the second half-life has elapsed, yet another 50% of the remaining parent isotope will decay into daughter isotopes, and so on.For all practical purposes, the original isotope is considered extinct after 6 half-life intervals. A small portion of a meteorite is vaporized in the device forming ions.

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