Potassium-Argon (K-Ar) dating is the most widely applied technique of radiometric dating. Potassium is a component in many common minerals and can be used to determine the ages of igneous and metamorphic rocks. The Potassium-Argon dating method is the measurement of the accumulation of Argon in a mineral.

What is the most common isotopes used in radiometric dating?

IsotopesEffective Dating Range (years)Uranium-235Lead-20710 million to origin of EarthRubidium-87Strontium-8710 million to origin of EarthPotassium-40Argon-40100,000 to origin of EarthCarbon-14Nitrogen-140-100,0003 more rows