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Range of potassium argon dating

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The site also must be geologically meaningful, clearly related to fossil-bearing rocks or other features that need a good date to join the big story.

Any alteration or fracturing means that the potassium or the argon or both have been disturbed.

The calcium-potassium age method is seldom used, however, because of the great abundance of nonradiogenic calcium in minerals or rocks, which masks the presence of radiogenic calcium.

On the other hand, the abundance of argon in the is relatively small because of its escape to the atmosphere during processes associated with volcanism.

The original atom is referred to as the parent and the following decay products are referred to as the daughter.

For example: after the it forms a component of all organic compounds and is therefore fundamental to life. Libby of the University of Chicago predicted the existence of carbon-14 before it was actually detected and formulated a hypothesis that radiocarbon might exist in living matter.