Download Study Questions for Quiz #9

Study questions for quiz 9
Quiz 9 will focus on chapter 21. Read this chapter carefully. There is a lot of material here.
What happens at convergent plate boundaries?
What are the three types of convergent boundaries?
What three factors play important roles in the final character of convergent margins?
Subduction zones have five different zones that develop within them. What are they?
In contrast, continent-continent collision produces a different response. What is it?
Continental collision is always marked by ______________ which causes ____________.
Why is magma generated in subduction zones?
What is meant by dehydration?
What types of magmas are formed in subduction zones?
How do they erupt?
What forms at depth?
What are plutons?
What are they dominantly composed of?
What type of magma forms in continental collision zones?
How is this magma formed, i.e. what melts to form it?
What type of metamorphism occurs near the trench?
What type of metamorphism occurs near the magmatic arc?
In oceanic-oceanic convergence, what happens to the subducting plate as it descends into the
mantle?
What are the four major structural and topographic features in a subduction zone? Note: look at
the top of figures 21.2 and 21.3
UNDERSTAND THE PROCESSES AND FEATURES SHOWN IN FIGURES 21.2, 21.3, 21.4 AND
21.13! I am thinking of having you recreate one or more of these diagrams for the Exam (not the
quiz)
What are three examples of mountain ranges formed by oceanic-continent collision?
When were the Rocky Mountains deformed?
When were the Appalachian Mountains deformed?
What is unique about the behavior of plates in continent-continent collisions?
What are two examples of mountain ranges formed by continent-continent collision?
Why does continental crust not subduct into the mantle?
Where do we see deep earth quakes?
What is an ‘accretionary wedge’?
O f what is the ‘Mesozoic history of western North America a good example’?
What are three examples of folded mountain belts? (fig 21.14)
How is magma formed in a subduction zone?
What types of rocks are produced from magmas in a subduction zone?
What accounts for the fact that volcanic eruptions at convergent plate boundaries are violent?
What are four famous examples of violent eruptions at convergent plate boundaries?
What is the difference between metamorphism in the forearc versus metamorphism that occurs in
the magmatic arc?
Where is continental crust formed?
What are ‘accreted terranes’?
What are the four types of accreted terranes? See figure 21.28
The basement rock beneath us is from the ‘Wyoming Province. How old is it?
Hotspots and Mantle Plumes
What are mantle plumes and what do they form?
What type of magma forms in a mantle plume?
What does a plume rising in the ocean floor produce?
What does a plume that develops beneath the continent form?
How many calderas form Yellowstone?
What is the relationship between the Snake River Plain and Yellowstone?
How old is the oldest volcanism in the Snake River Plain?
What is the Huckleberry Ridge Ash and how does it compare to the ash produced by Mt St Helens?
What are continental flood basalts (plateau basalts)?