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III. Layers of the Earth

III. Layers of the Earth. IV. Plate Boundaries. IV. Plate Boundaries. Plates move by convection currents in mantle. Plate movement. B. Convergent Plate Boundary. Ocean-Ocean (Subduction). Ocean-Continent (Subduction). Continent-Continent (Collision). C. Divergent Plate Boundary.

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III. Layers of the Earth

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  1. III. Layers of the Earth

  2. IV. Plate Boundaries

  3. IV. Plate Boundaries • Plates move by convection currents in mantle Plate movement

  4. B. Convergent Plate Boundary

  5. Ocean-Ocean (Subduction)

  6. Ocean-Continent (Subduction)

  7. Continent-Continent (Collision)

  8. C. Divergent Plate Boundary

  9. D. Transform Fault Boundary

  10. V. Seafloor Spreading • Oceanic crust is only about 200 million years old, where continental crust is about 3.5 billion years old! • Oceanic crust is constantly being made and subducted.

  11. YOUNG OLD V. Seafloor Spreading

  12. VI. Hot Spots • Caused by rising mantle plumes • Create Volcanoes and Volcanic Islands • Hawaiian Islands • Yellowstone National Park • Azores • Galapagos Hawaiian Islands

  13. VI. Hot Spots

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