noun[mass noun] Geology
A method of dating rocks from the relative proportions of radioactive potassium-40 and its decay product, argon-40.
- Using Potassium-Argon dating, the newly formed rocks gave ages between 0.5 and 2.8 million years.
- Basically, using Potassium-Argon dating, the scientists who erred found halos, or areas in the their samples that were of different geologic ages.
- We now consider in more detail one of the problems with potassium-argon dating, namely, the branching ratio problem.
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