Relative dating methods help scientists to

Simply stated, each bed in a sequence of sedimentary rocks (or layered volcanic rocks) is younger than the bed below it and older than the bed above it.

This law follows two basic assumptions: (1) the beds were originally deposited near horizontal, and (2) the beds were not overturned after their deposition.

If a geologist claims to be 45 years old, that is an absolute age.

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Yet, you’ve heard the news: Earth is 4.6 billion years old. That corn cob found in an ancient Native American fire pit is 1,000 years old. Geologic age dating—assigning an age to materials—is an entire discipline of its own.

Free 5-day trial You may already know how to date a fossil with a rock.

But did you know that we can also date a rock with a fossil?

But really, how do scientists figure out how old their dinosaur bones are?

And, what about other findings like fossil fish, plants and insects?

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