types of plate boundaries by tessia lee

divergent boundaries

divergent boundaries are when the tectonic plates move away from each other. this creates tension.

this picture represents tension

when tension is present volcanoes, earthquakes, and mid ocean ridges occur. some good examples are the mid atlantic ridge and the east pacific rise. (as shown here)

this volcano is the effect of a divergent boundary
this is the aftermath of a earthquake on a divergent boundary
the picture on the left shows you where the east pacific rise is and the picture on the right is a real picture of it

if its a continental-continental divergent boundary continental rifts may also occur. a good example of this is the east african rift. (as shown here)

this is a map showing you where the east african rift is

in may 2011 the grimsvotn volcano erupted in iceland. this eruption lasted for eight days. flights were canceled and roads were closed but theres no reported deaths.

these are all pictures of grimsvotn erupting

convergent boundaries

convergent boundaries are where the tectonic plates are moving together this creates compression

this is an example of compression

when two continental plates move together mountains are formed (like the ones shown here) and earthquakes occur.

as you can see here earthquakes can cause massive damage

when an oceanic and continental plate move toward each other earthquakes, trenches, and volcanoes occur.

this trench was created because of a convergent boundary

a real world example of a disaster is the tsunami they expect to happen at the cascadia subduction zone. they suspect that a 9.0 earthquake will result in a tsunami. they estimate that a total of 246,500 people will die during this disaster. below is a picture of this.

*subduction is when oceanic crust slides underneath continental crust. when the oceanic crust gets pulled down(because its more dense than the continental crust) to the mantle, creating a trench, the waterlogged crust heats up and water pushes up through the crust to create volcanoes.*

transform boundaries

transform boundaries are when the tectonic plates move past each other, creating shear.

this picture is demonstrating shear

when tectonic plates slide past each other it creates earthquakes and transform faults like the one shown here. the transform fault you see here is one of the most famous ones in the world. its known as the san andreas fault.

this picture shows the danger of transform faults
this picture shows exactly what happens at a transform boundary

as stated before the san andreas is one of the most famous transform faults in the world. lots of earthquakes happen here. lately theres been a swarm of earthquakes near bombay beach california. over 140 evens have happened since september 26th. calculations show that there could be a 7 magnitude earthquake there soon.

on the left is what is predicted to happen and on the right is the san andreas fault right now

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