Relative dating geology examples

After yet another 5,730 years only one-eighth will be left.

By measuring the carbon-14 in organic material, scientists can determine the date of death of the organic matter in an artifact or ecofact.

The half-life of potassium-40 is 1.3 billion years, far longer than that of carbon-14, allowing much older samples to be dated.

After another 5,730 years only one-quarter of the original carbon-14 will remain.It cannot be used to accurately date a site on its own.However, it can be used to confirm the antiquity of an item.Argon, a noble gas, is not commonly incorporated into such samples except when produced in situ through radioactive decay.The date measured reveals the last time that the object was heated past the closure temperature at which the trapped argon can escape the lattice.

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