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PLATE TECTONICS.

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Presentation on theme: "PLATE TECTONICS."— Presentation transcript:

1 PLATE TECTONICS

2

3 Alfred Wegener ( )

4 Alfred Wegener ( ) 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

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

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

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15

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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 Earth’s magnetic field

20 Earth’s magnetic field

21

22

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

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

25 Sea floor spreading

26 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

27 Geomagnetic Reversals

28

29 video

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31 III. Plate Tectonics

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

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

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36 The Wilson Cycle

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

39 A divergent boundary…..

40 A divergent boundary….. animation

41 A modern-day divergent boundary…..

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

44 Converging boundary….. Oceanic-Oceanic animation

45 Converging boundary…..

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

47 Converging boundary….. Continental-Oceanic animation

48 Converging boundary…..

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

50 Converging boundary….. Continental-Continental animation animation

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52

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

54 Transform boundary…..

55 Transform boundary….. animation

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

57

58 Hot Spots….. animation

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