Radiopotassium dating is a type of relative dating - K–Ar dating - Wikipedia


Fission-track dating. Etching of polished internal surfaces of the crystal (price and walker, 1962). Some measure the decay of isotopes more indirectly.

What simplifies things is that potassium is a reactive metal and argon is an inert gas: Potassium is always tightly locked up in minerals whereas argon is not part of any minerals. Argon makes up 1 percent of the atmosphere. So assuming that no air gets into a mineral grain when it first forms, it has zero argon content. That is, a fresh mineral grain has its K-Ar "clock" set at zero.


Radiopotassium dating is a type of relative dating

Radiopotassium dating is a type of relative dating