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The Earth’s interior

Plate Tectonics What is it and what makes it work? Steven Earle, Geology Department Malaspina University-College. The Earth’s interior. 1000 C. 4000 C. 7000 C. Pea-soup analogy. mantle convection. Heat transfer from the core to the mantle produces slow convection of the mantle material.

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The Earth’s interior

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  1. Plate TectonicsWhat is it and what makes it work?Steven Earle, Geology DepartmentMalaspina University-College

  2. The Earth’s interior 1000 C 4000 C 7000 C

  3. Pea-soup analogy

  4. mantle convection Heat transfer from the core to the mantle produces slow convection of the mantle material (in the order of centimetres per year)

  5. Mantle convection produces lateral forces at the boundary between the mantle and the crust

  6. Lateral forces at the crust-mantle boundary push the crust around – in different directions – and this leads to the motion of crustal plates. The plates are moving at rates of cm/year

  7. Plate motions

  8. Divergent boundary

  9. Convergent boundary Subduction

  10. Transform boundary

  11. Plates of the Earth’s crust

  12. Plates around North America

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