2. Today –Hot Spots –Past Plate Motions –Review TEST 1 –LAB: Describing Minerals Wednesday –TEST 1 –Chemistry of Minerals –READ Chapter 5 Next Monday –Rock Forming Minerals –LAB Identifying Minerals

4. Hot Spots

5. Global Distribution of Active Volcanoes Source: http://www.volcano.si.edu/world/location.cfmhttp://www.volcano.si.edu/world/location.cfm

6. 09_16b.jpg

7. 04_22.jpg

8. 04_21.jpg

9. 04_23b.jpg

10. 04_23a.jpg animation

12. 04_22.jpg

14. Past Plate Positions

15. Dating the Sea Floor (Fig. 4.11) animation

16. Magnetometer Fig 3.24a

17. Magnetic Field Strength near PNW Coast Fig 3.24b

18. Magnetic Field Strength Portland Source: http://wrgis.wr.usgs.gov/docs/gump/portland/portland.html

20. Magnetism of a Lava Flow Sequence (Fig 3.25)

21. Magnetic Field Flips Fig. 3.26

22. Magnetic Reversal Time Line (Fig 3.27)

23. Geomagnetic Timescale Fig. 3.30c

24. Cause of Reversals? Fig 3.27 http://www.es.ucsc.edu/~glatz/geodynamo.html

25. Fig 3.28 animation

26. 03_30.jpg

27. Dating the Sea Floor (Fig. 4.11) animation

28. 04_33.jpg Animation of Continental Drift

30. Cause of Plate Tectonics? Fig. 4.32

31. Convection in Mantle Fig. 4.28

32. C_12.jpg

33. C_16.jpg

34. Ridge Push and/or Trench Pull Fig. 4.29

35. Super Continent Cycle? http://www.gps.caltech.edu/~gurnis/Movies/Science_Captions/aggdisp.html http://www.uwgb.edu/dutchs/platetec/plhist94.htm#750my

37. West Coast Tectonics Fig 4.19

38. PNW Earthquakes & Plates

40. 3-D view: http://spike.geophys.washington.edu/SEIS/EQ_Special/WEBDIR_01022818543p/hypos.htmlhttp://spike.geophys.washington.edu/SEIS/EQ_Special/WEBDIR_01022818543p/hypos.html

41. Evidence for Past Subduction Zone Earthquakes?

42. What happens during subduction zone earthquake? Locking and Bulging GPS: ½ in/year Rebound uplift subsidence

43. Ghost Forest

44. And deposition by tsunami Coastal evidence of subduction zone earthquakes

45. Peat Layer topped by Tsunami Sand-Oregon

46. Orphan Tsunami in Japan Jan 29, 1700

47. Last Subduction Zone Earthquakes January 26th 1700 Coast Line from Vancouver Island to Northern California subsided approx. 6ft. M9! (100 times Nisqually earthquake)

48. How frequent? One every 300-800 years. Last one 300 y. a.

50. TEST 1 Chapters 2, 3, 4, prelude, interlude A & E

52. Minerals Crystals Grains in Rocks

53. Quartz Fig. 5.15

54. Metallic vs. Non-Metallic Luster Fig. 5.17

55. Streak Fig. 5.16

56. Table 5.1

57. Cleavage Fig. 5.19

58. 05_19de.jpg

59. Crystal Shapes Fig 5.5

60. 05_18a.jpg

61. Conchoidal Fracture Fig. 5.20

62. Fizz Test (Fig. 5.22)

65. For Wednesday 1/21 TEST 1 –Chapters 2, 3, 4, –prelude, interlude A & E –377-379 Reading-Chapter 5 Minerals