1. Announcements Exam 1 review session: Monday the 21 st at 5pm Here in McG-S room 20 Bring questions! Exam 1 itself: Wednesday the 23 rd

2. Quiz #4

3. Question 6 A B Question 1

4. Linking Volcanism and Faulting to Plate Tectonics

5. Geologic Excitement at Tectonic Plate Boundaries Hawaii?

6. World Hot Spots

8. Hot spots = individual, stationary sites of upwelling from mantle

9. Hawaiian Islands Lots of basaltic volcanism Islands become older to the NW Newer Older Oldest

10. Hot spot development over time

11. Hot spots: Hawaii

13. Pacific-North American Boundary

14. One tiny problem We haven’t found good evidence for plumes yet… Maybe they’re too small for our technology to see. Maybe they don’t exist. Big debate right now: plume theory vs. crack theory

15. Normal Faults: Basin and Range

16. Normal Faults: Basin and Range Grabben Horst ← Extension ->

17. Why is Nevada pulling apart?

20. Endogenic vs. exogenic Internal vs. external systems plate tectonics folding faulting volcanism weathering water erosion wind erosion Building up Breaking down tug of war glacial erosion

23. Yosemite, California P w < P e

24. P w > P e West Virginia

25. Champaign, France

26. Moab, Utah