1. Types of plate boundaries
Divergent plate boundary
Oceanic spreading ridge
Continental Rift zone
New rock produced
Convergent plate boundary
Oceanic-oceanic convergence
Continental-continental convergence
Mountains Uplifted
Oceanic - continental convergence
Subduction, Mountains, Volcanoes
Old rock destroyed at Trench
Transform plate boundary
Earthquakes

2. Divergent plate boundaries

3. Oceanic spreading ridge E.g. Mid-Atlantic ridge

4. new basaltic magma rises to the surface along the ridge forming new oceanic crust

5. What the central rift looks like in a spreading ridge

6. Continental Rift zone E.g. Africa and Iceland

7. Divergent plate boundaries on land form rift valleys
Divergent plate boundaries on land form rift valleys. New oceans are starting to open in these places.
These rift valleys often have volcanoes lining them.

8. Diagram of a rift valley E.g. West African rift

9. Oldoinyo volcano erupts inside the Africa rift zone

10. Rift valleys will increase in size till water fills them to form a Sea

11. So was the Atlantic Ocean!
The Red Sea and the Gulf of Aden were once rift valleys.
So was the Atlantic Ocean!

12. The formation of the Atlantic ocean

13. Convergent plate boundaries

14. Types Convergent plate boundaries
Oceanic-oceanic convergence
E.g. Japan, New Zealand
Oceanic - continental convergence
E.g. Andes, Sierra Nevada's
Continental-continental convergence
E.g. Himalayas

15. Oceanic-oceanic convergence
Subduction zone with deep trench!

16. Trench
Island arc
Piled up sedimentary rock:
This rock will go through the rock cycle as the ocean floor subducts (metamorphic then melt into magma)!!

17. Japan is an example of an Island Arc system
Trench
Island arc

18. Continental-continental convergence

19. The sub-continent of India has collided with the Eurasian continent to form the: Himalayas and Mnt. Everest!!

20. Old ocean sediments
Mountains: Folded Rocks due to collision
Uplifted plateau

21. Oceanic - continental convergence:
Subduction Zone!! – Rock is DESTROYED!
Crust is pushed up: (UPLIFT) – Mountain building.
E.g. Andes mountains

23. The Andes

25. Transform plate boundaries

27. North American plate
Pacific plate

28. Volcanoes and Plate boundaries

29. The interior of Planet Earth

30. Model of the Earth’s interior

32. Model of how convection currents in the mantle drive plate tectonics

33. Model 1

34. Model 2

35. The Plates

36. Plate boundaries and Hot spots

37. Summary:

38. Mountain roots