What is potassium argon dating
The method relies on satisfying some important assumptions: Given careful work in the field and in the lab, these assumptions can be met.The rock sample to be dated must be chosen very carefully.Lava flows that lie above and below rock beds with ancient human fossils are a good—and true—example.The information on this site can change lives—former atheists tell us so. Because it’s information people haven’t heard before.
The potassium-argon dating method has been used to measure a wide variety of ages.
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The potassium-argon (K-Ar) isotopic dating method is especially useful for determining the age of lavas.
In these materials, the decay product Ar is able to escape the liquid (molten) rock, but starts to accumulate when the rock solidifies (recrystallizes).
The amount of Argon sublimation that occurs is a function of the purity of the sample, the composition of the mother material, and a number of other factors.
The potassium-argon age of some meteorites is as old as 4,500,000,000 years, and volcanic rocks as young as 20,000 years old have been measured by this method.