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Structure of the Earth

Structure of the Earth. Crust = solid outermost layer Mantle = middle layer Core = inner layer outer core = liquid inner core = solid. Internal Heat Drives Geological Activity. Why do we have continental drift?. Convection: hot rock rises, cool rock falls.

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Structure of the Earth

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  1. Structure of the Earth Crust = solid outermost layer Mantle = middle layer Core = inner layer outer core = liquid inner core = solid

  2. Internal Heat Drives Geological Activity Why do we have continental drift? Convection: hot rock rises, cool rock falls.

  3. Internal Heat Drives Geological Activity Why do we have continental drift? Earth has molten center Convection current form in mantle The crust moves with these currents Convection: hot rock rises, cool rock falls & the solid surface of the Earth moves

  4. Surface of Earth Divided into Pieces called "Plates"

  5. Surface of Earth Divided into Pieces called "Plates" Figure 1-21

  6. Most Volcanoes form at plate boundaries

  7. Most Earthquakes occur at plate boundaries

  8. Types of Plate Boundaries Transform boundaries Figure 1-30

  9. Transform boundary Example: San Andreas Fault in CA

  10. Transform boundary Example: San Andreas Fault in CA

  11. Types of Plate Boundaries Divergent boundaries Figure 1-25

  12. Types of Plate Boundaries Divergent boundaries Example: Mid ocean ridge

  13. Types of Plate Boundaries Continental collision Convergent boundaries continental collision Figure 1-27

  14. Types of Plate Boundaries Convergent boundaries Subduction

  15. Hawaii = Hot spot

  16. What kind of plate boundaries are there off Washington’s coast?

  17. Cascadia subduction zone in side view http://en.wikipedia.org/wiki/Image:Subduction.jpg

  18. http://www.nps.gov/archive/olym/geology/accretion.htm

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