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Plate Tectonics

Plate Tectonics. Continental Drift. Antonio Snider-Pelligrini Alfred Wegener Arthur Holmes. Antonio Snider-Pellegrini, 1858. Apres. Avant. Continental Drift. Alfred Wegener. What did Wegener notice?. The fit of the continents, as shown by the geographer Snider-Pelligrini

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Plate Tectonics

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  1. Plate Tectonics

  2. Continental Drift • Antonio Snider-Pelligrini • Alfred Wegener • Arthur Holmes

  3. Antonio Snider-Pellegrini, 1858 Apres Avant

  4. Continental Drift Alfred Wegener

  5. What did Wegener notice? • The fit of the continents, as shown by the geographer Snider-Pelligrini • Fossil Locations

  6. Arthur Holmes • Holmes was an English geologist who in the 1930’s speculated that the circular motion of the mantle carried the continents along in much the same way as a conveyor belt. This idea influenced some of the workers who truly put forward the theory of Plate Tectonics.

  7. What were the other indications that the earth was made up of plates?

  8. Distribution of Earthquakes

  9. Mapping of the Sea floor

  10. Cross-section through Earth

  11. Types of Plate Boundaries • Convergent • Oceanic-Oceanic • Oceanic-Continental • Continental-Continental Divergent Mid-Atlantic Ridge East African Rift Zone

  12. Oceanic-Oceanic

  13. Arcs and trenches

  14. Mount Pinatubu

  15. Oceanic-Continental

  16. Mt. Rainier, Cascade Range

  17. Andes Mountains, Peru

  18. Continental-Continental

  19. Or in other words

  20. Tibetan Plateau

  21. Cross-section

  22. Divergent Plate Boundaries

  23. Iceland

  24. Mid-Atlantic Rift, Iceland

  25. Krafla

  26. African Rift

  27. Oldoinyo Lengai, East African Rift

  28. 'Erta 'Ale (Ethiopia)

  29. Hot Spots

  30. Map of World’s Hotspots

  31. Wahaula Visitor Center

  32. Mauna Loa

  33. Hawaii from Space

  34. Pacific Basin and the hotspot train

  35. Transform Faults

  36. San Andreas Fault

  37. Calaveras Fault

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