1. Relative Age

2. Relative Age
Places events in a sequence but does not identify their actual date of occurrence.

3. Absolute Time
Identifies the actual date of an event.

4. Law of Superposition
In a sequence of undisturbed sedimentary rocks, the oldest rocks will be at the bottom of the sequence and the youngest will be at the top.

6. Law of cross-cutting Relationships
An igneous rock is younger than the rocks it has intruded upon.

7. Younger

8. Law of included fragments
Pieces of one rock found in another rock must be older than the rock in which they are found

9. Older
Rock is
Youngest

10. Unconformity
A place in the rock record where the layers of rock are missing
Due to erosion

11. Unconformity

12. Homework #2