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    Absolute dating of fossils definition

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    We talked about relative dating of rocks and how scientists use stratigraphic succession to compare the ages of different rock layers.

    Accurate dates also allow us to create sequences of evolutionary change and work out when species appeared or became extinct. These are: Where possible, several different methods are used and each method is repeated to confirm the results obtained and improve accuracy.

    Using relative dating the fossil is compared to something for which an age is already known.

    For example if you have a fossil trilobite and it was found in the Wheeler Formation.

    Instead, other methods are used to work out a fossil’s age.

    These include radiometric dating of volcanic layers above or below the fossils or by comparisons to similar rocks and fossils of known ages.

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