1. The Sea Floor

3. Continental vs. oceanic crust

4. What is Continental Drift? The idea that the plates are floating and moving around on a liquid mantle.

5. Evidence of Continental Drift and Plate Tectonics 1. Discovery of Mid-Ocean ridges

6. 2. The fact that the earth fits together like a puzzle.

7. 3. Similar species found on different continents

8. 4. Deep sea rock much younger than continental rock. Why?

9. 5. Distribution of earthquakes and volcanoes

10. 6. Magnetic anomalies on the sea floor

11. Fossils found on high on mountains

12. All this combined led to the current theory of plate tectonics. We are moving right now.

13. Direction of plate movement

14. Three types of plate movement 1. Diverging boundary 2. Converging boundary 3. Transform boundary

15. Diverging Boundary – mid ocean ridge

16. Converging Boundary Two Types – Oceanic crust to continental crust – subduction zones – Continental crust to Continental crust

17. Oceanic crust to continental crust – subduction zones

18. Continental crust to Continental crust

19. Transform Boundary

20. San Andres Fault

23. Seamount

24. Island Arc Formation

25. Atolls

26. Atoll formation

27. Continental Margins

28. Mid Ocean Ridges

29. Hydrothermal Vents