1. Fascinating Fossils A Unison Reading by Alfredo, Luis, Jesus, Gian, and Marcos

2. [The group stops at the end of the first paragraph] Alfredo: Everyone understand this paragraph? Jesus: Yes, you? Alfredo: The dinosaur dies and is in the rock. Then the people find the rock. Luis: Miss, he said it all! Jesus: The fossil people can know how the life changed. Luis: I understand that the dinosaurs died million years ago and we can find them all over the world. Jesus: The bones. Gian: The animals, plants die, the life on Earth changed through time. Alfredo: And at the museum we can see the fossils.

3. Relative Dating
There are rules to relative dating. Here are the ones you need to know:
Law of Original Horizontality
Law of Superposition
Law of Cross-cutting Relationship
Law of Included Fragments
Unconformities

4. Laws of Original Horizontality and Superposition
Layers are deposited horizontally
The oldest layer is on the bottom, the youngest layer is on the top

5. Law of Superposition: The Pizza Rule

6. Law of Superposition

7. Law of Cross-Cutting Relationships
A fault or intrusion that goes through a rock layer is younger than that rock layer

8. Law of Cross-Cutting Relationships: The Twinkie Rule

9. Law of Cross-Cutting Relationships

10. Law of Included Fragments
A rock layer with pieces of another rock layer inside it is younger than the pieces
Pieces of a rock layer inside another rock layer are older than the rock layer they are inside

11. Law of Included Fragments: The Chocolate Chip Cookie Rule

13. Unconformities An unconformity can represent: lost time
A tilting or folding event