applied anthropology
concepts
geography/geology
A radiometric dating technique based on the decay of 40 K to the daughter isotope 40 Ar, by electron capture. Together with argon-argon (Ar-40/Ar-39) dating, K-Ar dating is principally used to obtain the ages of potassium-rich minerals in volcanic lavas and tuffs. [Source: Encyclopedia of Environmental Change; potassium-argon (K-Ar) dating]
potassium-argon dating