In previous lessons, we talked about the Geologic Time Scale and how scientists use it to piece together the history of the earth.We talked about relative dating of rocks and how scientists use stratigraphic succession to compare the ages of different rock layers.

relative dating of fossils worksheets-64

Obviously, the fossil assemblages change from period to period.

They follow an ordered progression that is very clear and predictable.

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

William Smith collected fossils from his work sites and, over time, he learned to recognize which fossils tended to show up in which rock strata.

He began to identify rock layers by the fossils they contained, and he even noticed that the general order of strata was identical over many different parts of the country.

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

Watch this video to find out how we use index fossils to establish the relative ages of rocks.

This group is dedicated to providing information about the scientific method as it concerns the idea of evolution in the Creation/Evolution debate.

The site provides background information about stratigraphic principles and relative time, biostratigraphy (using fossils for relative dating), and radiometric dating.

Therefore, we can use the succession of fossil assemblages to establish the relative ages of rocks.