Convergent Plate
Boundaries
Finz 2011
What are the 3 types of
Convergent Plate Boundaries?
• Convergent Continent-Ocean
• Convergent Ocean-Ocean
• Convergent Continent- Continent
Convergent Continent-Ocean
Plate Boundary
• Occurs when an ocean plate collides
with a continental plate
• The ocean plate will ALWAYS go
underneath the continental plate
• The process of the ocean plate going
underneath a continental plate is called
- SUBDUCTION
What forms at a Convergent
Continent-Ocean Boundary?
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New Metamorphic Mountains
Ocean trenches
Subduction zone for plate melting
Magma chamber from melted plate
Continental Volcano above magma
chamber
What kinds of Earthquakes occur at an
Convergent Continental-Ocean Boundary?
• Along the subduction zone there will be:
– shallow EQ’s
– intermediate EQ’s
– deep EQ’s
• All these EQ’s occur along a 45° angle
Convergent Ocean-Ocean Plate
Boundary
• Occurs when an ocean plate collides
with another ocean plate
• The most dense ocean plate will
ALWAYS go underneath the less dense
plate
• The process of an ocean plate going
underneath another ocean plate is called
- SUBDUCTION
What forms at a Convergent
Ocean-Ocean Boundary?
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Ocean trenches
Subduction zone for plate melting
Magma chamber from melted plate
Oceanic Volcano above magma chamber
A series of new islands called an
Archipelago or an Island Arc
– an archipelago is a chain of volcanic islands
What kinds of Earthquakes occur at an
Convergent Ocean-Ocean Boundary?
• Along the subduction zone there will be:
– shallow EQ’s
– intermediate EQ’s
– deep EQ’s
• All these EQ’s occur along a 45° angle
Convergent Continent-Continent
Plate Boundary
• Occurs when a continental plate collides
with another continental plate
• The two continents deform because of
the collision
• Both plates are bent up and down
What forms at a Convergent
Continent-Continent Boundary?
• New Metamorphic Mountains
What kinds of Earthquakes occur at an
Convergent Continent-Continent Boundary?
• Along the collision zone there will be:
– shallow EQ’s
– intermediate EQ’s
– deep EQ’s
Transform Fault or Side-by-side
Plate Boundary
• Occurs along a crack in a tectonic plate
• Each plate will slide past one another
What forms at a Transform Fault
or Side-by-side Boundary?
• Fault lines
• Rift Valleys
What kinds of Earthquakes occur at a
Transform Fault or Side-by-side Plate
Boundary?
• Along the friction zone there will be:
– shallow EQ’s
– intermediate EQ’s
– deep EQ’s
Japanese Tsunami Videos
• http://www.youtube.com/watch?v=oWzdgBNfhQU
• Graphic• http://www.youtube.com/watch?v=dJBS94GVyuo&feature=fvst
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http://video.pbs.org/video/1863101157 - long video
http://www.youtube.com/watch?v=GL5gVPoz-uE
http://www.youtube.com/watch?v=naQZ0PR3S6w
http://www.youtube.com/watch?v=iLZcjfWfuO8&feature=edu&li
st=PL0A49CA0F0E6D8EDA