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Types of plate boundaries

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

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Types of plate boundaries

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  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 rockdestroyed 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. 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. 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

  22. The Andes

  23. Transform plate boundaries

  24. North American plate Pacific plate

  25. Volcanoes and Plate boundaries

  26. The interior of Planet Earth

  27. Model of the Earth’s interior

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

  29. Model 1

  30. Model 2

  31. The Plates

  32. Plate boundaries and Hot spots

  33. Summary:

  34. Mountain roots

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