09 24-2013-relative age
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How do we find the relative age of rocks and fossils?
Page 30
Remember when we did this?
Relative Age
How did we arrange ourselves?
Relative Age
Relative Age: comparison of ages – is it younger or older than the rocks/fossil layers around itoSuperposition – older rock is below
younger rockoIndex Fossils – fossils of organisms
that lived for a relatively short period of time
Relative vs Absolute Age
Absolute age: how long since the rock or fossil was formedoFound using radiometric dating
Relative vs Absolute Age
SuperPosition
You Try!
Retrieved from here
You Try
Retrieved from here
Geologic Column
From Holt Science and Technology Georgia Earth Science
1. How many layers are there in your geologic column?
2. Which layer is oldest? Which layer is youngest? How do you know?
3. What fossil is the oldest?4. What fossils can be considered
index fossils? Why?
Reflection on Page 31
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