Chapter 14 _Friday Apr 4_

Chapter 14 _Friday Apr 4_ - Title Page Photo Plate...

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1 Title Page Photo Plate Tectonics Vulcanism Diastrophism
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2 From Rigid Earth to Plate Tectonics • Wegener’s Continental Drift – Fig. 14-1 http://geoweb.princeton.edu/courses/WebWhacker_2.0/WebWhacker_Database/WW171.html
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3 Wegener’s Theory based on: •Transatlantic connection • Rock types and geological history •Fossils
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4 – Fig. 14-2 Wegener’s flaw – no plausible propelling mechanism
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5 Plate Tectonics • Convection: The missing propelling mechanism – Movement of mass due to changes in its density caused by gain or loss of heat heat H - H + heat Core Mantle Lithosphere
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6 • The Evidence 1. Ocean floor mapping • Extensive mid-ocean ridge system
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7 The Evidence 2. Seafloor spreading • Harry Hess (1962) – Fig. 14-7
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8 The Evidence 3. Verification of sea floor spreading a. Core sampling – Glomar Challenger – Fig. 14-8
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9 3. Verification of sea floor spreading b. Paleomagnetism – Matthews and Vine (1963) – Fig. 14-8
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10 • Age of the ocean floors based on paleomagnetism – Fig. 14-9
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11 The Evidence 4. Plate Tectonics: Theory combining sea-floor spreading and drift theories – Fig. 14-10 http://en.wikipedia.org/wiki/Plate_tectonics
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12 • Plate Boundaries 1. convergent 2. divergent 3. transform – Fig. 14-11. Types of Plate Boundaries
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13 – Divergent Plate Boundaries: Origin of Ocean Basins – Fig. 14-12
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14 • Rift Valley Formation – Begins on a continent – Grows to become linear sea (“proto-ocean”) – Constructive boundary (rock is created) – Fig. 14-13
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15 • Jordan Rift Valley http://en.wikipedia.org/wiki/Great_Rift_Valley
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This note was uploaded on 04/13/2008 for the course GEO 101 taught by Professor Shapiro during the Spring '08 term at Rutgers.

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Chapter 14 _Friday Apr 4_ - Title Page Photo Plate...

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