Potassium argon dating granite

It cannot be used to accurately date a site on its own.However, it can be used to confirm the antiquity of an item.

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Particular isotopes are suitable for different applications due to the type of atoms present in the mineral or other material and its approximate age.Heating an item to 500 degrees Celsius or higher releases the trapped electrons, producing light.This light can be measured to determine the last time the item was heated. Fluctuating levels can skew results – for example, if an item went through several high radiation eras, thermoluminescence will return an older date for the item.This technique is based on the principle that all objects absorb radiation from the environment.This process frees electrons within minerals that remain caught within the item.

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