Plate movement and resultant landscape

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Plate movement and resultant landscape

  1. 1. Plate Movement and resultant landscape
  2. 2. Types of plate movements <ul><li>When plates collide or converge </li></ul><ul><li>When plates move apart/diverge </li></ul><ul><li>When plates slide past each other </li></ul>
  3. 3. Types of plate movement and resulting landforms <ul><li>When plates collide or converge: </li></ul><ul><ul><li>Case 1: Collision of an oceanic plate and a continental plate </li></ul></ul><ul><ul><ul><li>Peru-Chile Trench </li></ul></ul></ul><ul><ul><li>Case 2: Collision of 2 oceanic plates </li></ul></ul><ul><ul><li>Case 3: Collision of 2 continental plates </li></ul></ul><ul><li>Where 2 plates converge: </li></ul><ul><ul><li>Destructive plate boundary </li></ul></ul>
  4. 4. Subduction Zone Fold mountains Oceanic-continental convergence
  5. 6. Oceanic-oceanic convergence
  6. 7. Continental-continental convergence
  7. 9. Types of plate movement and resulting landforms (cont) <ul><li>When plates move apart/diverge: </li></ul><ul><ul><li>Case 1: Two oceanic plates move apart </li></ul></ul><ul><ul><ul><li>Mid-Atlantic Ridge </li></ul></ul></ul><ul><ul><li>Case 2: Two continental crusts move apart </li></ul></ul><ul><li>Where 2 plates diverge: </li></ul><ul><ul><li>Constructive plate boundary </li></ul></ul><ul><li>Note: </li></ul><ul><ul><li>over the Earth as a whole, sea-floor spreading and subduction are in equilibrium </li></ul></ul><ul><ul><li>(total amount of crustal mats. At any one time is constant!) </li></ul></ul>
  8. 10. Sea floor spreading
  9. 12. Types of plate movement and resulting landforms (cont) <ul><li>When plates slide past each other: </li></ul><ul><ul><li>along a transform fault </li></ul></ul><ul><ul><li>no crustal material is added or destroyed </li></ul></ul><ul><ul><li>causes stress along fault >>> earthquakes </li></ul></ul><ul><li>Where 2 plates slide past: </li></ul><ul><ul><li>Conservative plate boundary </li></ul></ul><ul><ul><ul><li>San Andreas Fault in California </li></ul></ul></ul>
  10. 14. Summary
  11. 15. Summary (cont) <ul><li>Whenever plate movement occurs, there develops: </li></ul><ul><ul><li>folding </li></ul></ul><ul><ul><li>faulting </li></ul></ul><ul><ul><li>vulcanicity </li></ul></ul><ul><ul><li>earthquakes </li></ul></ul>

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