Absolute dating science

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What’s more, if the whole rock is badly weathered, it will be hard to find an intact mineral grain containing radioactive isotopes.

You might have noticed that many of the oldest age dates come from a mineral called zircon.

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Geologists draw on it and other basic principles ( to determine the relative ages of rocks or features such as faults.

Chart of a few different isotope half lifes: In reality, geologists tend to mix and match relative and absolute age dates to piece together a geologic history.

If a rock has been partially melted, or otherwise metamorphosed, that causes complications for radiometric (absolute) age dating as well.

In a way this field, called geochronology, is some of the purest detective work earth scientists do.

There are two basic approaches: relative age dating, and absolute age dating.

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