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Plate Tectonics and Earth History

Plate Tectonics and Earth History. Breakup and Assembly of Pangaea. Locating the Continents. Since 200 m.y. ago: Magnetic Stripes In Pangaea: Fit of Edges Before Pangaea Fossil Assemblages Collision History Climate Indicators Paleomagnetism. Magnetic Dip.

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Plate Tectonics and Earth History

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  1. Plate Tectonics and Earth History

  2. Breakup and Assembly of Pangaea

  3. Locating the Continents • Since 200 m.y. ago: Magnetic Stripes • In Pangaea: Fit of Edges • Before Pangaea • Fossil Assemblages • Collision History • Climate Indicators • Paleomagnetism

  4. Magnetic Dip • The earth’s magnetic field has both a horizontal and a vertical direction

  5. Locating the Ancient Continents • Paleomagnetism gives paleolatitudes accurate to about 10 degrees • There is no way of determining paleolongitude • The further back we go, the more pieces are unaccounted for

  6. Assembly of Pangaea

  7. Rodinia

  8. Closure of the Tethys

  9. Pangaea, 220 m.y.

  10. 80 m.y.

  11. The Mediterranean, 20 m.y.

  12. The Mediterranean, 15 m.y.

  13. The Mediterranean, 6 m.y.

  14. Why Does the Middle East Have so Much Oil?

  15. The Collision of India and Asia

  16. Earthquakes in Asia

  17. Plate Tectonics and Western North America

  18. Western U.S. and the Andes

  19. How the West Was Stretched

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