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Chapter 12-1

Chapter 12-1. Continental Drift. Pan- gaea “ all - earth ” . Note: Our world today is actually a 2’nd or 3’rd generation “super continent” or “ pangea ” !!!. Alfred Wegener “Continental Drift Theory”. Bumper Sticker!. How many words do you know?.

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Chapter 12-1

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  1. Chapter12-1 Continental Drift

  2. Pan-gaea “all - earth” Note: Our world today is actually a 2’nd or 3’rd generation “super continent” or “pangea” !!!

  3. Alfred Wegener “Continental Drift Theory”

  4. Bumper Sticker!

  5. How many words do you know?

  6. a) Matching Rocks! b)Matching Mountain Ranges! c) Matching Fossils!

  7. Sa

  8. More Climatic Evidence of Continental Drift…… • Paleo-glaciation! Refers to the study of Old Glaciers Foundin Africa!!!

  9. These glacial scrapings are found in AFRICA !!!

  10. Continents are still moving today!

  11. Alternate theory of Continental Drift • http://www.youtube.com/watch?v=Hf74Sp0Xe6Q

  12. Unfortunately….. • Wegener’s idea of continental drift (1930) was rejected…. • People said…if “continental drift” is true…..explain how it occurs! Where is the proof ????

  13. Give me the proof!

  14. Harry Hess (American)…. 1950’s …Makes a Startling Discovery…

  15. Its called …...“Sea Floor Spreading” • http://www.youtube.com/watch?v=sruSoUoZAUg&feature=related

  16. This is called “Sea Floor Spreading”

  17. Evidence of SeaFloor Spreading is called “Magnetic Reversal”

  18. Sea Floor Spreading – Review • http://www.youtube.com/watch?v=t-ctk4KR-KU&feature=related

  19. Africa is Splitting Apart!!!

  20. Canadian Tuzo Wilson Puts it all together ! He explains how continental drift occurs! (1965) • Paleomagnetism and Sea Floor Spreading explains continental drift! (and why ….. • A) why fossils on both sides of the ocean are the same • B) why mountain ranges on both sides of the ocean are the same • C) why rocks are the same on both sides of the ocean • D) why coal is found in the Antarctic • E) why paleoglaciation explained rock scrapings in Africa • Continental Drift!!!! --- • The slow movement of continental plates caused by sea floor spreading over hot, rising magma (liquid rock)

  21. Hawaiian Islands ….formed by Hot Spots !!

  22. Summary

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