• Converging plates can be oceanic, continental, or one of each.
  • A subducting plate creates volcanoes.
  • Many of the world's volcanoes are the result of subduction at a convergent plate boundary.
  • Melting at divergent plate boundaries is due to release of pressure.
  • Lava erupts through long cracks in the ground, or fissures.
  • Seafloor spreading creates new seafloor in the rift valleys.
  • Rifting in a continent can create a new ocean eventually.
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