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The interior structure of the earth<br />
The interior structure of the earth<br />
The crust and part of the upper mantle = lithosphere<br /> about 100 km thick <br />Less dense than the material below it ...
The plastic layer below the lithosphere = asthenosphere<br />The plates of the lithosphere float on the asthenosphere<br /...
The interior structure of the earth<br />The Crust<br />Two types of crust:<br />Continental<br />Oceanic<br />
Differences between oceanic crust and continental crust?<br />Continental crust is composed of granite while the oceanic c...
How this tears the surface apart<br />
In 1912 a German scientist named Alfred Wegener proposed the theory that the crustal plates are moving over the mantle. Th...
Pangaea<br />
The Spreading Continents<br />
Plate Boundaries Map<br />Major plates only<br />
Plate Boundaries Map<br />
Types of Plate Boundaries<br />
Types of Plate Boundaries<br />
Rift Valleys - ccd<br />
Oceanic Convergence<br />
Oceanic to Continental Convergence<br />
Continental Collision<br />
Transform Faults<br />
The future?<br />
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Plate tectonics axb

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An introduction to plate tectonics

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Plate tectonics axb

  1. 1. The interior structure of the earth<br />
  2. 2. The interior structure of the earth<br />
  3. 3. The crust and part of the upper mantle = lithosphere<br /> about 100 km thick <br />Less dense than the material below it so it “floats”<br />The interior structure of the earth<br />The Lithosphere<br />
  4. 4. The plastic layer below the lithosphere = asthenosphere<br />The plates of the lithosphere float on the asthenosphere<br />The interior structure of the earth<br />The Asthenosphere<br />
  5. 5. The interior structure of the earth<br />The Crust<br />Two types of crust:<br />Continental<br />Oceanic<br />
  6. 6. Differences between oceanic crust and continental crust?<br />Continental crust is composed of granite while the oceanic crust is composed of basalt. <br />The density of the continental crust is less than the oceanic crust, thus it floats higher on the mantle.<br />
  7. 7. How this tears the surface apart<br />
  8. 8. In 1912 a German scientist named Alfred Wegener proposed the theory that the crustal plates are moving over the mantle. This was supported by fossil and rock type evidence; also matching of coastline shapes.<br />
  9. 9.
  10. 10.
  11. 11. Pangaea<br />
  12. 12. The Spreading Continents<br />
  13. 13.
  14. 14. Plate Boundaries Map<br />Major plates only<br />
  15. 15. Plate Boundaries Map<br />
  16. 16. Types of Plate Boundaries<br />
  17. 17. Types of Plate Boundaries<br />
  18. 18. Rift Valleys - ccd<br />
  19. 19. Oceanic Convergence<br />
  20. 20. Oceanic to Continental Convergence<br />
  21. 21. Continental Collision<br />
  22. 22. Transform Faults<br />
  23. 23. The future?<br />

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