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Questions and Answers
What is the primary reason for the extensional deformation in the East African Rift Valley?
What is the primary reason for the extensional deformation in the East African Rift Valley?
- The underlying mantle is rising from below and stretching the overlying continental crust (correct)
- The Pacific Ring of Fire is expanding
- The African plate is being pushed together
- The Red Sea is shrinking
What type of volcanism is common in areas of extensional deformation?
What type of volcanism is common in areas of extensional deformation?
- Strombolian
- Andesitic
- Basaltic and rhyolitic (correct)
- Phreatomagmatic
What is the name of the region in the western U.S. where extensional deformation and volcanism are occurring?
What is the name of the region in the western U.S. where extensional deformation and volcanism are occurring?
- East African Rift Valley
- Pacific Ring of Fire
- Basin and Range Province (correct)
- Rio Grande Rift
What is the name of the zone around the Pacific Ocean where many active and dangerous volcanoes are located?
What is the name of the zone around the Pacific Ocean where many active and dangerous volcanoes are located?
What is the process by which the crust is being stretched and eventually rifted apart in the East African Rift Valley?
What is the process by which the crust is being stretched and eventually rifted apart in the East African Rift Valley?
What type of fault is produced by extensional deformation?
What type of fault is produced by extensional deformation?
What is the name of the process by which the underlying mantle rises from below and melts to produce magmas?
What is the name of the process by which the underlying mantle rises from below and melts to produce magmas?
What is the name of the region where the African plate is being split?
What is the name of the region where the African plate is being split?
What type of eruptions are common in Iceland?
What type of eruptions are common in Iceland?
What is the type of volcanism that occurs in the Mid-Atlantic Ridge?
What is the type of volcanism that occurs in the Mid-Atlantic Ridge?
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