Tectonic plates
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16 Terms
How big are eruptions at Divergent margins?
small and effusive
Why are eruptions small?
basaltic lava has a low gas content and high viscosity
Features of Earthquakes at Divergent margins
Shallow, less than 60km deep and under 5.0 magnitude
What plate combinations can we have at Divergent margins?
Oceanic-oceanic and Continent-continent
What are collision zones?
occurs when tectonic plates meet at a convergent boundary both bearing continental lithosphere
Features of collision zone earthquakes
Shallow, high magnitude
What plate combinations can we have at Collision margins?
Oceanic-oceanic, Continent-continent, Oceanic-Continent
Features of Conservative boundary earthquakes
shallow, high magnitude, destructive
What plate combinations can we have at Conservative margins?
Oceanic-continent
What direction does a divergent plate move?
The plates move away from eachother
What magnitude are Divergent earthquakes?
Low magnitude
What direction do convergent plates move?
They move towards each other and one subducts
Which plate boundary does Subduction occur?
Convergent
What direction does conservative plates move?
They slide against eachother
Name 3 characteristics of Oceanic plates
High density, Basaltic rock. 7-10km thick
Name 3 characteristics of Continental plates.
Less dense, Granite rock and 25-70km thick
Note 
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