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Geology Unit 1: Plate Tectonics

Geology Unit 1: Plate Tectonics. . Volcanoes. Erupting Volcanoes Volcano Video Selection including the Earth at Night. Image:  The Indonesian volcano Anak Krakatau erupts at night (credit: Getty Images/Tom Pfeiffer/ VolcanoDiscovery ). Mt St Helens, 1973. The Cascade Range.

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Geology Unit 1: Plate Tectonics

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  1. Geology Unit 1: Plate Tectonics

  2. .

  3. Volcanoes • Erupting Volcanoes • Volcano Video Selection including the Earth at Night Image: The Indonesian volcano Anak Krakatau erupts at night (credit: Getty Images/Tom Pfeiffer/VolcanoDiscovery)

  4. Mt St Helens, 1973

  5. The Cascade Range

  6. The Bulge of Mt Saint Helens

  7. May 18, 1980 Eruption of Mt. St. Helens

  8. Mt. St. Helens Before and After Mt St Helens Video Scientists Discuss MSH

  9. Mount Saint Helens Mount Saint Helens Video

  10. Mount Saint Helen’s Eruption May 18, 1980 Succession Animation

  11. 1982 Mount Saint Helens Lahar

  12. Plate Tectonic Setting of the Cascades

  13. Cascade Subduction Zone

  14. Oceanic Trench Oceanic trenches are the surficial expression of subduction zones Mt St Helens

  15. Mount Fuji

  16. Popocatepetl, Mexico Pinatubo, Philippines Mt. Fuji, Japan Vesuvius, Naples, Italy

  17. Plate Tectonics

  18. Plate Boundaries

  19. Geology Layout

  20. Plate Tectonics • Plate Tectonics build up mountains and weathering and erosion pull them down.

  21. Basic Idea of Plate Tectonics • The Earth’s surface is divided into a few large thick plates that move slowly and change in size. • Intense geologic activity occurs at plate boundaries

  22. Most Recent Earthquakes • http://earthquake.usgs.gov/earthquakes

  23. The 15 Largest Earthquakes in the United States Location Date Time UTC Magnitude 1. Prince William Sound, Alaska 1964 03 28 03:36:14.0 UTC 9.2 2. Andreanof Islands, Alaska 1957 03 09 14:22:31.9 UTC 9.1 3. Rat Islands, Alaska 1965 02 04 05:01 and 08:40 UTC 8.7 4. East of Shumagin Islands, Alaska 1938 11 10 20:18:41.2 UTC 8.2 5. New Madrid, Missouri 1811 12 16 08:15 UTC 8.1 6. Yakutat Bay, Alaska 1899 09 10 17:04 and 21:41 UTC 8.0 7. Andreanof Islands, Alaska 1986 05 07 22:47 UTC 8.0 8. New Madrid, Missouri 1812 02 07 09:45 UTC ˜8   9. Near Cape Yakataga, Alaska 1899 09 04 00:22 UTC 7.9 10. Fort Tejon, California 1857 01 09 16:24 UTC 7.9 11. Ka'u District, Island of Hawaii 1868 04 03 02:25 UTC 7.9 12. Gulf of Alaska, Alaska 1987 11 30 19:23 UTC 7.9 13. New Madrid, Missouri 1812 01 23 15:00 UTC 7.8 14. Imperial Valley, California 1892 02 24 07:20 UTC 7.8 15. San Francisco, California 1906 04 18 13:12 UTC 7.8

  24. Earthquake Preparedness • Judge Judy

  25. How Earthquakes work National Geographic Taiwan, 1999

  26. Seattle Earthquake • National Geographic http://youtube.com/watch?v=V0WuSCaTYI0

  27. Tsunami Wave National Geographic Tsunami Cruise Boat meets Tsunami Wave Japanese Tsunami

  28. Tsunami Videos • Link to before and after pictures • Indonesian Tsuanmi Video Natioanal Geographic • Tsunami 101 National Geographic

  29. Plate Boundaries

  30. Earthquake and Plate Tectonics

  31. Lithosphere and Asthenosphere • Oceanic Plates – Basalt – Thinner – More Dense • Continental Plates – Granite – Thicker – More Buoyant

  32. Divergent Plate Boundaries • Plates moving apart • Examples • Mid-ocean ridge (Iceland sits on the Mid Atlantic Ridge) • Red Sea

  33. Divergent Plate Boundary

  34. Iceland

  35. Mid Ocean Ridge System

  36. Mid Atlantic Rift

  37. Pangaea The Appalachians were formed as North America, Africa and Europe collide to create Pangaea 300 million years ago.

  38. Sea Floor Spreading

  39. Hydrothermal VentsBlack and White Smokers

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