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Alfred Wegener (1880-1930)

Alfred Wegener (1880-1930) . Mid Atlantic Ridge. Mid Ocean Ridge System. Sea Floor “Stripes”. http://atlas.geo.cornell.edu/education/instructor/tectonics/polarity.html. Convergent Margin. Major Lithospheric Plates. Source: NASA. Plate Configuration of PNW. Plate Margins.

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Alfred Wegener (1880-1930)

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  1. Alfred Wegener (1880-1930)

  2. Mid Atlantic Ridge

  3. Mid Ocean Ridge System

  4. Sea Floor “Stripes” http://atlas.geo.cornell.edu/education/instructor/tectonics/polarity.html

  5. Convergent Margin

  6. Major Lithospheric Plates Source: NASA

  7. Plate Configuration of PNW

  8. Plate Margins • Divergent margins: spreading centers where new lithosphere (sea floor) is created • Convergent margins: plates are moving toward each other • Transform margins: plates move past one another without creating or destroying lithosphere

  9. Mantle Convection Source: University Montpellier

  10. Geothermal Gradient

  11. Rate of Plate Movement

  12. Plate Margins Source: USGS

  13. Juan de Fuca Ridge Source: GSC

  14. Plate Margins Source: USGS

  15. East African Rift

  16. Plate Margins Source: USGS

  17. Juan de Fuca Ridge Source: GSC

  18. Continental-Continental Convergence Source: USGS

  19. Himalayas Source: USGS

  20. Transform Margin

  21. Transform Faults Left-Lateral Right-Lateral

  22. Alpine Fault, New Zealand

  23. Volcanism and Plate Margins Source: Smithsonian

  24. Earthquakes and Plate Margins

  25. Plate Tectonics Control • Igneous rock types (type and location of volcanism) • Seismic activity (type and location of earthquakes) • Location of sedimentary basins • Location of uplifts or mountain ranges • Location of ocean basins

  26. Hawaii-Emperor seamount chain

  27. Interval Age (my) Distance (kms) Rate (cm/yr) 1 0.8 180 22.50 2 1.3 3 1.8 4 2.6 5 3.7 6 5.1 7 10.3 8 12 9 18.9 10 20.6 11 27.2 12 42.4 Table

  28. Chart

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