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Chap 2 OCE1001 Figueroa

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Chap 2 OCE1001 Figueroa
1. Identify all of the types of plate boundaries that are associated with active volcanism.
a. Divergent
b. Convergent
2. Identify all of the different observations Alfred Wegener used to support his theory of continental drift.
a. Fossil distribution
b. Match of mountain belts among North America, Europe, and Greenland
c. Fit of continents, matching rock units
d. Glacial deposits (moving away from Antartica)
3. Identify all of the different observations used to support Harry Hess' theory of seafloor spreading.
a. Which of the following observations support the theory of seafloor spreading
i. Seafloor magnetic anomalies
4. How does the density of Earth’s composition change as you get closer to the core?
a. The density of Earth materials increases as the core is approached.
5. What is the mechanism by which lithospheric plates move?
a. Seafloor spreading
6. What is a subduction zone?
a. oceanic trench site of crust destruction
7. How are magnetic stripes on the seafloor created?

8. What are the 3 types of plate boundaries?
a. Divergent
b. Convergent
c. Major transform
9. Describe the 3 types of plate boundaries including their geological features.
a. Divergent: move apart
i. Ocean-Ocean (new seafloor created) mid-ocean ridge ii. Continent-Continent (continent breaks apart) continental rift, shallow sea
b. Convergent: move together
i. Ocean-Ocean (seafloor destroyed) ocean trench ii. Ocean-Continent (seafloor destroyed) ocean trench iii. Continent-Continent (mountain building) mountain range
c. Transform: move past each other
i. Ocean (seafloor conserved) transform vault ii. Continent (seafloor conserved) transform vault
10. What method is used to study the structure of the mantle?
a. Seismic tomography
11. List the layers of Earth based on physical properties and on chemical properties, from the surface to the center.
a. The crust and the mantle are divided into the following layers in order of increasing depth:
i.
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