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13. volcano notes
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13. volcano notes

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  • 1. Any activity that includes the movement of magma towards or onto Earth’s surface Volcanism:
  • 2. Liquid rock produced under the Earth’s surface Magma:
  • 3. Magma that flows onto the Earth’s surface Lava:
  • 4. A vent or fissure in Earth’s surface through which magma and gases are expelled Volcano:
  • 5. Convergent  Oceanic-Continental • Denser oceanic crust sinks underneath less dense continental crust • As a result an ocean trench and mountains on the continental crust are created • Water, melted crust, and mantle materials form magma • Magma rises to the surface forming a volcanic mountain range Subduction Zone Formation
  • 6. Convergent  Oceanic-Oceanic • One plate subducts under the other and melts into magma • Magma rises to surface and builds up over time to form an island arc Subduction Zone Formation
  • 7. Divergent • Magma rises up to create new crust and form underwater volcanoes Mid-Ocean Ridge Formation
  • 8. • Hot Spot – a volcanically active area of Earth’s surface, commonly far away from a boundary • Magma rises to the surface from a stationary location forming a volcanic island • The plate moves over top of it, creating a chain of islands Hot Spot Formation: