L4.2: Plate Boundaries

• PLATE BOUNDARIES

  ● Divergent Boundaries

  ● Convergent Boundaries

  ○ Oceanic-continental convergence

  ○ Oceanic-oceanic convergence

  ○ Continental-continental convergence

  ● Transform Plate Boundaries
• ● Convergent Boundaries: Plates colliding by moving towards each other. The zone of plate convergence is the site of destruction.
• Oceanic-continental convergence: OC collides with CC causing it to subduct into the asthenosphere because it’s denser.
• Oceanic-oceanic convergence: When two OC collides, the one farther from the continental crust will subduct. As the subducting plate is pushed deeper into the mantle, it melts. The magma creates rises and erupts and forms a line of volcanoes.
• Continental-continental convergence: When two CC collides, the lithosphere cannot subduct; they just smash together. The material has nowhere to go but up. Earthquakes and metamorphic rocks resulted from the tremendous forces of the collision. This results in mountain ranges because the crust is too thick for the magma to get through.
• ● Transform Plate Boundaries: Plates slip past one another without the production or destruction of the crust. Experiences massive earthquakes. San Andreas Fault ● Note: sa continental continental convergence, sabi ni sir magsusubduct yung cc that’s closer to the oceanic crust.