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Plate tectonics

Plate tectonics. A Layered Earth. Classifying the layers by composition. Crust Oceanic crust Continental crust Mantle Core. Classifying the layers by physical properties. Lithosphere Asthenosphere Mantle Core. Isostatic equilibrium buoyancy Source of Internal heat Radioactive decay

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Plate tectonics

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  1. Plate tectonics A Layered Earth

  2. Classifying the layers by composition • Crust • Oceanic crust • Continental crust • Mantle • Core

  3. Classifying the layers by physical properties • Lithosphere • Asthenosphere • Mantle • Core

  4. Isostatic equilibrium • buoyancy • Source of Internal heat • Radioactive decay • Conduction • convection

  5. The Evidence for layering • Earth quakes • Primary and secondary seismic waves • Shadow zones

  6. Continental Drift • Pangaea • panthalassa

  7. Seafloor spreading • Subduction zones • Plate tectonics

  8. Plate Boundaries • Divergent plate boundaries • mid Atlantic ridge • Convergent plate boundaries • Transform plate boundaries

  9. Divergent plate boundaries • Ocean – Ocean • Continent - Continent

  10. Convergent plate boundaries • Ocean – Ocean • Island arc • Ocean – Continent • Continent - Continent

  11. Confirmation of Plate Tectonics • Paleomagnetism • Apparent Polar wandering • Hot spots • Atolls and Guyots • Age and distribution of sediments • Terranes

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