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Types of Plate Boundaries

Page history last edited by coylem@... 13 years, 11 months ago

 

 

 

Types of Plate Boundaries and the Results of Each Type

 

 

 

 

Continental:Oceanic Convergent 

 

            

 

Results: Subduction zone, basaltic oceanic crust is more dense than granitic continental crust.  Deep Ocean Trenches, Stratovolcanoes and Volcanic Mts. on Land. ex. Cascade Mountains in the Pacific Northwest US and the Andes Mountains in South America.  Compression, Reverse faulting, strong earthquakes.

 

 

 

Oceanic:Oceanic Convergent

 

   

 

 

Results: Subduction zone.  Deep Ocean Trenches, Island Arcs, Undersea Volcanism.  ex. Mariana Trench, Japan, Aleutian Islands (Alaska), Phillipines, Sumatra (2004 Tsunami).  Compression, Reverse faulting, strong earthquakes.

 

 

 

Continental:Continental Convergent

 

      

 

Results: Folded Mountains on Land.  ex. Himalayan Mts., the Alps in Europe, the Appalachian Mts. (ancient orogonies or mountain building events) in the Eastern United States.  Compression, Reverse faulting, Strong earthquakes.

 

 

 

Oceanic:Oceanic Divergent

 

 

Results:  Mid-Ocean ridges surrounded by new oceanic crust, the newest crust is closest to the rift zone.  Tension, Normal faulting, weak earthquakes.  ex. Mid-Atlantic Ridge, East Pacific Rise.

 

 

 

Continental:Continental Divergent

 

 

Results:  Young plate boundaries, rift valleys that may eventually fill with ocean water creating a new ocean and then it becomes an oceanic-oceanic divergent boundary/mid-ocean ridge.  Tension.  Normal faulting, weak earthquakes.  ex. Great Rift Valley Africa, Lake Superior in North America (ancient/dormant rift).

 

 

 

Transform Boundaries

 

 

Results:  Moderate Earthquakes on land or on the ocean floor, shearing force.  ex. San Andreas fault (California, USA), North Anatolian fault (Turkey, active), Chaman fault (Pakistan, active), Dead Sea fault (Middle East).

 

 

 

 

 

 

 

 

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