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Tectonic Processes: Plate Tectonics

Tectonic Processes: Plate Tectonics. November 16 th , 2011. Plate Tectonics. Seven Large and Many small plates. 80km thick Move a few cm a year. Types of movement. Convergent Divergent Transform-Fault ( ie . Slip and slide). Subduction. Oceanic plate collides with continental plate

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Tectonic Processes: Plate Tectonics

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  1. Tectonic Processes: Plate Tectonics November 16th, 2011

  2. Plate Tectonics • Seven Large and Many small plates • 80km thick • Move a few cm a year

  3. Types of movement • Convergent • Divergent • Transform-Fault (ie. Slip and slide)

  4. Subduction • Oceanic plate collides with continental plate • Forming a deep oceanic trench (long, narrow, deep basin) • Ex. Boundary between the oceanic Nazca Plate and the continental South American Plate

  5. Continental Plates Collides • Himalayas

  6. Divergent Boundaries • Mid-Atlantic Ridge • Sea Floor spreading

  7. Transform-Fault • Plates move horizontally • San Andreas Fault Line

  8. Pangaea Theory • 1912 by Alfred Wegener • Supercontinent • Split up between 200 and 300 million years ago

  9. Six Key Proofs • Coastline fit • Geologic fit • Paleoclimatology • Pale glaciation • Fossil Correlation • Palemagnetism

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