Potassium argon dating definition Old girl cam2cam
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.
The potassium-argon dating method has been used to measure a wide variety of ages.
The geomagnetic polarity time scale was calibrated largely using K–Ar dating.
Ar (argon), the atom typically remains trapped within the lattice because it is larger than the spaces between the other atoms in a mineral crystal.
This method is important as it allows crystals forming and cooling during different events to be identified.
One problem with argon-argon dating has been a slight discrepancy with other methods of dating.) reports that a correction of 0.65% is needed.
But it can escape into the surrounding region when the right conditions are met, such as change in pressure and/or temperature.