L2- Stories That Stick Flashcards
What happens at a constructive plate boundary?
The oceanic and continental plates move apart
What happens at a destructive plate boundary?
The plates collide
When are collision zones formed?
Collision zones are formed when two continental plates collide. Neither plate is forced under the other so a form fold mountain is formed.
How thick is continental crust?
30 to 50 km thick
How thick is oceanic crust?
6km to 10km thick
Is continental crust more dense or less dense? And which one do you think is subducted?
Continental crust is less dense so cannot be subducted!
Name a few examples of what you might get at a destructive plate boundary?
Andes mountains (Peru) Destructive earthquakes (around 9.5 magnitude) Tsunamis
Does andesitic magma have a lower temperature?
Yes, andesitic magma has a lower temperature than normal magma!
Name the two types of plate boundary?
Destructive
Constructive