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PLATE TECTONICS

PLATE TECTONICS. Alfred Wegener (1880-1930). Alfred Wegener (1880-1930). The Origin of Continents and Oceans (1915). I. Continental Drift. Pangea: “all lands”. I. Continental Drift A. Fit of the Continents. Fit of the Continents. I. Continental Drift A. Fit of the Continents

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PLATE TECTONICS

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  1. PLATE TECTONICS

  2. Alfred Wegener (1880-1930)

  3. Alfred Wegener (1880-1930) The Origin of Continents and Oceans (1915)

  4. I. Continental Drift

  5. Pangea: “all lands”

  6. I. Continental Drift A. Fit of the Continents

  7. Fit of the Continents

  8. I. Continental Drift A. Fit of the Continents B. Fossil Evidence

  9. I. Continental Drift A. Fit of the Continents B. Fossil Evidence C. Rock Types

  10. I. Continental Drift A. Fit of the Continents B. Fossil Evidence C. Rock Types D. Paleoclimate Evidence

  11. PLATE TECTONICS I. Continental Drift Alfred Wegner (1915) A. Fit of the Continents B. Fossil Evidence C. Rock Types D. Paleoclimate Evidence WHAT IS MISSING………?

  12. II. Mounting Evidence of Contin. Drift

  13. Earth’s magnetic field

  14. Earth’s magnetic field

  15. B. Polar Wandering (S.K. Runcorn, 1950)

  16. II. Mounting Evidence of Contin. Drift • Earth’s magnetic field • Polar Wandering (S.K. Runcorn, 1950) C. Sea Floor Spreading (Harry Hess, 1960)

  17. Sea floor spreading

  18. II. Mounting Evidence of Contin. Drift • Earth’s magnetic field • Polar Wandering (S.K. Runcorn, 1950) C. Sea Floor Spreading (Harry Hess, 1960) D. Geomagnetic Reversals

  19. Geomagnetic Reversals

  20. video

  21. III. Plate Tectonics

  22. III. Plate Tectonics • Concept: an assimilation of the ideas of Wegner (continental drift) with sea floor spreading and geomagnetics

  23. III. Plate Tectonics • Concept: an assimilation of the ideas of Wegner (continental drift) with sea floor spreading and geomagnetics • Plate Boundaries

  24. The Wilson Cycle

  25. III. Plate Tectonics • Plate Boundaries 1. Divergent Hot Spot and Triple Junctions

  26. A divergent boundary…..

  27. A divergent boundary….. animation

  28. A modern-day divergent boundary…..

  29. III. Plate Tectonics • Plate Boundaries 1. Divergent 2. Convergent a. oceanic-oceanic

  30. Converging boundary….. • Oceanic-Oceanic animation

  31. Converging boundary…..

  32. III. Plate Tectonics • Plate Boundaries 1. Divergent 2. Convergent a. oceanic-oceanic b. oceanic-continental

  33. Converging boundary….. • Continental-Oceanic animation

  34. Converging boundary…..

  35. III. Plate Tectonics • Plate Boundaries 1. Divergent 2. Convergent a. oceanic-oceanic b. oceanic-continental c. continental-continental

  36. Converging boundary….. • Continental-Continental animation animation

  37. Transform boundary…..

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