Ignite
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Transcript of Ignite
Plate Boundaries
Types of Plate BoundariesConvergent BoundariesDivergent BoundariesTransform Fault Boundaries
Convergent BoundariesConvergent Boundaries exist when two plates
are colliding together. There are three different types of Convergent Boundaries: 1. Ocean:Ocean2. Ocean:Continent 3. Continent:Continent.
Exists when two plates are being pushed together.
Ocean: Ocean ConvergentTwo 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 ConvergentOceanic 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 ConvergentCauses 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 BoundariesExists when two plats are being pulled apart
from one another.There are two different types of Divergent
Plate Boundaries:1. Ocean:Ocean 2. Continent:Continent
Ocean:Ocean DivergentNew 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 DivergentWhen a continental crust is pulled apart, it
causes a rift valley.Not making any new crust.
Example
The Appalachian Mountains
Transform Fault BoundaryExists when two plates are sliding past one
another.There are two types of Transform Fault
Boundaries:1. Ocean:Ocean2. Continent:Continent
Ocean:Ocean or Continent:Continet Transform FaultSqueezed 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 ConvergentOcean:Continent ConvergentOcean:Ocean Divergent