What is potassium argon dating
With 18 protons and 22 neutrons, the atom has become Argon-40 (Ar-40), an inert gas.
For every 100 K-40 atoms that decay, 11 become Ar-40.
Developed in the 1950s, it was important in developing the theory of plate tectonics and in calibrating the geologic time scale.
Potassium occurs in two stable isotopes (Ar atoms trapped inside minerals.
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The target mineral is separated using heavy liquids, then hand-picked under the microscope for the purest possible sample.This is actually a mini-simulator, in that it processes a different sample each time and generates different dates.K-Ar Processing The Potassium-Argon dating method is an invaluable tool for those archaeologists and paleoanthropologists studying the earliest evidence for human evolution.Potassium-Argon Dating Potassium-Argon dating is the only viable technique for dating very old archaeological materials.Geologists have used this method to date rocks as much as 4 billion years old.