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LAB 6 :

LAB 6 :. EARTH’S MOVING CONTINENTS. Key Question: Have the continents & oceans always been in the same positions they are today?. No,CONVECTION in the mantle DRIVES CONTINENTAL DRIFT. Continental Drift.

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LAB 6 :

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  1. LAB 6: EARTH’S MOVING CONTINENTS Key Question: Have the continents & oceans always been in the same positions they are today?

  2. No,CONVECTION in the mantle DRIVESCONTINENTAL DRIFT

  3. Continental Drift Continents are not in a fixed position. They have moved and will continue to move over time.

  4. Alfred Wegener – Proposed the theory of continental drift (1912)

  5. Evidence Supporting CONTINENTAL DRIFT THEORY and that the supercontinentPANGEAonce existed

  6. Evidence for Continental Drift Continents fit like a puzzle: for example the east coast of South America and the west coast of Africa fit together.

  7. Evidence for Continental Drift Fossil Evidence: 300mya each continent had the same plant fossil

  8. Evidence for Continental Drift Modern Mammals: for example, today each continent has similar yet distantly related insect eating mammals.

  9. Evidence for Continental Drift Glacial Grooves: Marks carved in the land as glaciers moved over them

  10. Evidence for Continental Drift Suture Zones: Area where continents collide/join together. Mountains form

  11. Evidence for Continental Drift MOUNTAIN RANGES LINE UP when the continents are moved together

  12. Evidence for Continental Drift SIMILAR ROCK TYPES: Located across Oceans

  13. Evidence for Continental Drift GPS (Global Position System): satellite based system that measures plate movement

  14. 225 Million Years Ago

  15. 200 Million Years Ago

  16. 135 Million Years Ago

  17. 65 Million Years Ago

  18. Present Day

  19. Breakup of PANGEA

  20. Ring Of Fire

  21. The Future…

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