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Plate Boundaries

Plate Boundaries

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Plate Boundaries

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  1. Plate Boundaries

  2. 2 Types of Plates • Ocean plates - plates below the oceans • Continental plates - plates below the continents

  3. Divergent Boundaries • Boundary between two plates that are moving apart or rifting   • RIFTING causesSEAFLOOR SPREADING

  4. Features of Divergent Boundaries • Mid-ocean ridges • rift valleys • fissure volcanoes

  5. The Mid-Ocean Ridge

  6. The East African Rift Valley

  7. Convergent Boundaries • Boundaries between two plates that are colliding   • There are 3 types…

  8. Type 1 • Ocean plate colliding with a less dense continental plate • Subduction Zone: where the less dense plate slides under the more dense plate • VOLCANOES occur at subduction zones

  9. Andes Mountains, South America

  10. Type 2 • Ocean plate colliding with another ocean plate • The less dense plate slides under the more dense plate creating a subduction zone called a TRENCH

  11. Japan Island Chain

  12. Type 3 • A continental plate colliding with another continental plate • Have Collision Zones: • a place where folded and thrust faulted mountains form.

  13. Appalachian Mountains

  14. Transform Fault Boundaries • Boundary between two plates that are sliding past each other • EARTHQUAKES occuralong faults

  15. San Andreas Fault, CA