1. Relative Dating

2. Relative age –age of a rock compared to other rocks.

3. Law of Superposition
In horizontal layers, oldest layer is on the bottom, youngest layer is on the top

4. Law of Original Horizontality
Sediments are deposited horizontally.
Any tilting occurs afterwards

5. Principle of Cross-cutting Relations
1. intrusions – magma that cuts through rock layers
Is younger than the tocks they cut through
2. Extrusions – magma that has sedimentary layers deposited above it.
- it is horizontal

7. Put the layers in order: oldest to youngest

8. Put in order:

9. Put in order