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The Sea Floor

The Sea Floor. Continental vs. oceanic crust. What is Continental Drift?. The idea that the plates are floating and moving around on a liquid mantle. Evidence of Continental Drift and Plate Tectonics. 1. Discovery of Mid-Ocean ridges. 2. The fact that the earth fits together like a puzzle.

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The Sea Floor

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  1. The Sea Floor

  2. Continental vs. oceanic crust

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

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

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

  6. 3. Similar species found on different continents

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

  8. 5. Distribution of earthquakes and volcanoes

  9. 6. Magnetic anomalies on the sea floor

  10. Fossils found on high on mountains

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

  12. Direction of plate movement

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

  14. Diverging Boundary – mid ocean ridge

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

  16. Oceanic crust to continental crust – subduction zones

  17. Continental crust to Continental crust

  18. Transform Boundary

  19. San Andres Fault

  20. Seamount

  21. Island Arc Formation

  22. Atolls

  23. Atoll formation

  24. Continental Margins

  25. Mid Ocean Ridges

  26. Hydrothermal Vents

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