potassium-argon
adjective
po·tas·si·um-ar·gon
pə-ˈta-sē-əm-ˈär-ˌgän 
: being or relating to a method of dating paleontological or geologic materials based on the radioactive decay of potassium to argon that has taken place in a specimen
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“Potassium-argon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/potassium-argon. Accessed 25 Apr. 2024.
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