1. PLATE TECTONICS

3. Alfred Wegener (1880-1930)

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

5. I. Continental Drift

6. Pangea: “all lands”

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

8. Fit of the Continents

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

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

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

17. 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………?

18. II. Mounting Evidence of Contin. Drift

19. A.Earth’s magnetic field

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

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

25. Sea floor spreading

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

27. Geomagnetic Reversals

29. video

31. III. Plate Tectonics

32. A.Concept: an assimilation of the ideas of Wegner (continental drift) with sea floor spreading and geomagnetics

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

35. The Wilson Cycle

36. III. Plate Tectonics A.Plate Boundaries 1. Divergent Hot Spot and Triple Junctions

37. A divergent boundary…..

38. animation

39. A modern-day divergent boundary…..

41. III. Plate Tectonics A.Plate Boundaries 1. Divergent 2. Convergent a. oceanic-oceanic

42. Converging boundary….. Oceanic-Oceanic animation

43. Converging boundary…..

44. III. Plate Tectonics A.Plate Boundaries 1. Divergent 2. Convergent a. oceanic-oceanic b. oceanic-continental

45. Converging boundary….. Continental-Oceanic animation

46. Converging boundary…..

47. III. Plate Tectonics A.Plate Boundaries 1. Divergent 2. Convergent a. oceanic-oceanic b. oceanic-continental c. continental-continental

48. Converging boundary….. Continental-Continental animation

49. Transform boundary…..

52. III. Plate Tectonics A.Plate Boundaries 1. Divergent 2. Convergent a. oceanic-oceanic b. oceanic-continental c. continental-continental 3. Transform

53. Transform boundary…..

54. animation

55. III. Plate Tectonics A.Plate Boundaries 1. Divergent 2. Convergent a. oceanic-oceanic b. oceanic-continental c. continental-continental 3. Transform 4. Other (hotspots)

56. Hot Spots….. animation