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Plate Tectonics

This comprehensive overview of plate tectonics explores Harry Hess's sea floor spreading theory, detailing the mechanics of divergent, convergent, and transform boundaries. Discover how tectonic plates interact, causing geological phenomena such as earthquakes, volcanic activity, and the formation of mountain ranges. The text discusses the evidence supporting continental drift, including Pangaea, and highlights real-world examples like the Great Rift Valley and the San Andreas Fault. Engage with quizzes to test your knowledge of tectonic processes and their impact on Earth's landscape.

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Plate Tectonics

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  1. Plate Tectonics By: J. Farr

  2. Harry Hess’s theory of Sea floor spreading • Sea floor spreads apart • Magma moves upward and flows through the cracks

  3. Pangaea • http://www.ig.utexas.edu/research/projects/plates/images/pangea.jpg

  4. Divergent Boundary Definition: Two Plates moving apart • dl.ccc.cccd.edu/.../ geology100/IntroLecture1.htm

  5. Convergent Boundary Oceanic Plate is forced under the less dense Continental Plate. courses.unt.edu/.../ exam1images/Fg16_09b.jpg600 x 400 pixels - 131k

  6. Transform Boundary Two plates slide past one another

  7. Wegener’s Theory • Provided evidence of Continental drift but, didn’t know how or why.

  8. Effects of Plate Tectonics Fault Block Mountains Strike Slip faults Mountains Volcanoes Earthquakes

  9. Fault Block Mountain Diverging Plates Ex: The Great Rift Valley of Africa http://www.longitudebooks.com/images/book_large/EAF91.jpg

  10. Strike Slip Faults Cause Earthquakes One plate is sliding past another. Ex: San Andreas Fault Plates move suddenly and vibrations are felt within Earth which are felt as Earthquakes

  11. Converging Continental Plates Plates move together Force causes folding of rock layers These become Mountain Ranges

  12. Converging Oceanic Plates One plate slides under the other Melting occurs Volcanoes are formed Entire Mountain Ranges can be formed

  13. Fun Fact Hawaii is moving towards Japan at a rate of 8.3cm per year.

  14. Quiz • What are the 3 different types of boundaries that occur with Sea Floor Spreading? • What are some of the effects of Plate tectonics?

  15. Bibliography • California Content Standards • http://www.cde.ca.gov/cfir/ • 6th Grade Standards • Pangea • http://www.ig.utexas.edu/research/projects/plates/images/pangea.jpg • Diagram of Pangea • Convergent Boundary • courses.unt.edu/.../ exam1images/Fg16_09b.jpg600 x 400 pixels - 131k • Divergent Boundary • dl.ccc.cccd.edu/.../ geology100/IntroLecture1.htm • Great Rift Valley of Africa • http://www.longitudebooks.com/images/book_large/EAF91.jpg • The Way The Earth Works • http://www.lhsgems.org/images/Tectonics.gif • diagram of Earth’s movement

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