These laws of relative dating are

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

The narrower a range of time that an animal lived, the better it is as an index of a specific time.

No bones about it, fossils are important age markers.

Pretty obvious that the dike came after the rocks it cuts through, right?

With absolute age dating, you get a real age in actual years.

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