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Evidence for Plate Tectonics

Evidence for Plate Tectonics. By state inner core - solid outer core - liquid lower mantle - ductile solid asthenosphere - ductile solid lithosphere - rigid solid. Earth’s Interior. By composition core - Fe & Ni mantle crust. lithosphere. asthenosphere. Plate Tectonics.

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Evidence for Plate Tectonics

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  1. EvidenceforPlate Tectonics

  2. By state inner core - solid outer core - liquid lower mantle - ductile solid asthenosphere - ductile solid lithosphere - rigid solid Earth’s Interior • By composition • core - Fe & Ni • mantle • crust lithosphere asthenosphere

  3. Plate Tectonics • The earth’s surface is made of plates that move and interact. • plates are rigid lithosphere • most activity is at the margins of the plates • the plates are the surface

  4. Fit of the Continents

  5. Fossil distribution Fit of the Continents • Igneous & sedimentary rocks • geologic structures Glacial Deposits

  6. Seafloor Spreading Shape of the seafloor Age of the seafloor (measured with riometric dating, paleomag, sed thickness)

  7. Locations of Geologic Activity earthquakes volcanoes

  8. Hot Spots

  9. Measured Movement

  10. Measured Movement

  11. Causes of Motion • mantle motion • slab pull • ridge push

  12. History of plate movement

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