Fossil relative dating worksheet
We will calculate absolute age using radiometric dating principles.
Lastly, we will investigate how geologists use the geologic time scale to divide Earth's history.
Try it risk-free You may already know how to date a fossil with a rock.
Students will also measure the relative ages of rock layers and identify gaps in the rock record.
Index fossils help us to distinguish between rock strata from different time periods, so it's important that they don't cover too much historical ground.
We wouldn't want to use a horseshoe crab fossil, because horseshoe crabs have existed for over 400 million years and are still alive today!
One outcrop shows layers from one geologic time period, while the other outcrop represents a different time. Can he put the pieces together to make the story more complete? Let's find out how scientists deal with this common problem by using the fossils inside the rocks.
Back in 1793, there lived a land surveyor named William Smith.