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Plate Boundaries
Types of Plate Boundaries Convergent Boundaries Divergent Boundaries Transform Fault Boundaries
Convergent Boundaries Convergent Boundaries exist when two plates are colliding together. There are three different types of Convergent Boundaries:  Ocean:Ocean Ocean:Continent Continent:Continent.			 Exists when two plates are being pushed together.
Ocean: Ocean Convergent Two oceanic plates colliding, one has to give and one goes down as the other one rises up. Most have the same density. Creates volcanoes and earthquakes caused by the faults.
Example The Ring of Fire
Ocean:Continent Convergent Oceanic crust will always go down and the continental crust will always go up, because the continental crust is more dense. Earthquakes are caused by the trenches. Partial melting of oceanic and continental crust cause explosive magma.
Example The Mariana Trench – Underwater Volcanoes!
Continent:Continent Convergent Causes a lot of faults by the rocks pushing together.  Potential for earthquake activity. No volcanoes because there is no subduction zone. Enormous mountain ranges.
Example East Africa
Divergent Plate Boundaries Exists when two plats are being pulled apart from one another. There are two different types of Divergent Plate Boundaries: Ocean:Ocean Continent:Continent
Ocean:Ocean Divergent New crust is being made. Underwater mountains and volcanoes exist. Also called a spreading center, the further away from the spreading center, the older the crust.
Example Mid Atlantic Ridge
Continent:Continent Divergent When a continental crust is pulled apart, it causes a rift valley. Not making any new crust.
Example The Appalachian Mountains
Transform Fault Boundary Exists when two plates are sliding past one another. There are two types of Transform Fault Boundaries: Ocean:Ocean Continent:Continent
Ocean:Ocean or Continent:Continet Transform Fault Squeezed in different directions. As they move, earthquakes happen. They can be along side any other plate boundary.
Example The San Andreas Fault
Which Plate Boundaries Cause Volcanoes?
Ocean:Ocean Convergent Ocean:Continent Convergent Ocean:Ocean Divergent
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