Download Convergent Plate Boundary Diagrams

Convergent Plate Boundary Diagrams - Key
What’s the problem with the oceanic-oceanic diagram when we use the Aleutians as a reference island arc?
Name:_______________________________________ Date:_______________ Hour:_______ST#_______
Convergent and Divergent Plate Boundary Diagrams
Fill in the blanks with the best term that corresponds with each number.
Resources: http://pubs.usgs.gov/gip/dynamic/understanding.html
http://www.learner.org/interactives/dynamicearth/tectonicsmap/
http://geology.com/nsta/convergent-plate-boundaries.shtml
http://www.scienceclarified.com/landforms/Basins-to-Dunes/Continental-Margin.html
http://www.livescience.com/43220-subduction-zone-definition.html
http://www.universetoday.com/43822/subduction-zone/
Continental-Continental Convergence (C-C Convergent)
1._________________________________________ 4. _________________________________________
2._________________________________________ 5. _________________________________________
3._________________________________________ 6. _________________________________________
a. What is created during a continental-continental collision?
b. Why do the two plates crumple and fold instead of one plate somewhat easily subducting under
another the way it happens with oceanic/continental convergence?
Oceanic-Oceanic Subduction/Convergence (O-O Convergent)
1._________________________________________ 4. _________________________________________
2._________________________________________ 5. _________________________________________
3._________________________________________ 6. _________________________________________
a. What two things are created at oceanic-oceanic subduction zones?
b. Which tectonic plate is more dense, the one on the left or the right? How do you know?
c. What is thought to happen to the plate on the left once it reaches the asthenosphere and continues to
subduct deeper and deeper?
Oceanic-Continental Subduction/Convergence (O-C Convergent)
1._________________________________________ 4. _________________________________________
2._________________________________________ 5. _________________________________________
3._________________________________________ 6. _________________________________________
a. What two things are created at oceanic-continental subduction zones?
b. Why is the oceanic crust subducting under the continental crust?
c. How do some of the mountains on the coast become volcanic (where does the magma originate)?
d. These O-C convergent volcanoes tend to have more violent explosions than the ones in Hawaii due to
the silica content of the continental plates and the steam created out of the water trapped in sediments
that are subducted with the oceanic plate. Which plate material has more silica in it, continental or
oceanic? What is the relationship between silica content and viscosity?
Divergent Boundary
1
2
3
a. What feature of the crust is being created in Diagram 1? Name a location where this occurs.
b. Why is the Rift Valley in Diagram 2 getting filled with water?
c. What will be created on either side of the spreading center in Diagram 3? (2 things!)