1. What are the 2 methods of dating in Geologic Time?

2. __________ and _______________ studied features preserved in rocks & present-day geologic processes.
Why is Sir Charles Lyell important?
Uniformitarianism 

3. Seven principles of relative dating:.
Who formulated these principles?
Who expounded upon these principles?

4. Original horizontality 
Superposition 
Lateral continuity
Grand Canyon, Ariz.

5. A B
Inclusions
In A & C, granite contains inclusions & is younger than the inclusions.
In B, sandstone is younger than the granite b/c it contains inclusions of granite.
Wisconsin C

6. Cross-cutting relationships 
Ontario, Canada
Castaic, Ca
Cross-cutting relationships 

7. Principle of deformed rocks 

8. Types of Unconformities
What are conformable contacts?
Unconformities 
What is a hiatus?
Types of Unconformities

9. What is a Disconformity?
How are disconformities recognized?

10. What is an Angular unconformity?
James Hutton = 1st to recognize & understand the significance of an angular unconformity
Siccar Point, Scotland

11. What is a Nonconformity?

12. What is correlation? Why do geologists use correlation?
Factors:
What are Key beds?

13. Why are fossils important?
What are Index fossils?

14. What is Faunal succession?

15. Absolute-Dating
___________________________ discovered radioactivity in 1903.
Radiometric dating 
Radioactivity 
Isotopes 

16. Radioactive decay 
Alpha decay
Beta decay
Electron capture

17. Half-Lives

18. How was the Geologic Time Scale Developed?
How was the Geologic Time Scale Developed?

19. Can sedimentary rocks be dated radiometrically? Explain.
How are they dated?