Potassium-Argon Dating 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.

What two substances are used in radiocarbon dating?

Since both carbon-12 and carbon-14 are used in the expression to calculate the age of any substance, both are used in radiocarbon dating.