Chapter 10

1. The Canadian Shield is composed primarily of: A. young sedimentary rocks. B. old sedimentary rocks. C. young metamorphic rocks. D. old metamorphic rocks.

2. The rocks of the Canadian Shield are excellent sources of: A. petroleum. B. coal. C. iron. D. salt.

3. The rocks of the Canadian Shield represent: A. Roots of ancient mountain belts B. Large tracks of preserved ocean floor C. Fossil coal swamps D. Rich dinosaur bone beds

4. As you move away from the Canadian Shield the rocks generally become: A. older. B. younger.

5. Which tectonic province of North America is the youngest? A. Canadian Shield B. Coastal Plain C. Appalachian fold belt D. the Cordillera

A. increases B. decreases C. stays the same 6. In the Appalachian fold belt, the intensity of deformation as you go from the coast inland. A. increases B. decreases C. stays the same

7. The Valley and Ridge province of the Appalachian fold belt is characterized by highs (ridges) and lows (valleys) controlled by: A. folding. B. faulting. C. igneous intrusions. D. A and B. E. B and C.

8. The Coastal Plain province is characterized by: A. high-intensity fold belts. B. large igneous intrusions. C. flat-lying sedimentary layers. D. large mountains. E. active volcanism.

9. The North American Cordillera is a mountain belt that extends from Alaska to: A. Oregon. B. California. C. Arizona. D. Guatemala. E. It only occurs in Alaska.

10. The development of the North American Cordillera occurred mainly in the: A. Precambrian. B. early Paleozoic – late Paleozoic. C. late Paleozoic – early Mesozoic. D. late Mesozoic – early Cenozoic. E. early Cenozoic – late Cenozoic.

11. The Basin and Range province developed as the result of: A. continental collision. B. continental extension. C. transform faulting.

A. passive B. active C. dynamic 12. What type of continental margin occurs when a plate boundary coincides with the edge of a continent? A. passive B. active C. dynamic

13. Active margins can be characterized by: A. earthquakes. B. volcanic activity. C. mountain building. D. All of the above.

A. magmatic addition. B. accretion. C. volcanism. D. erosion. 14. The Pacific Northwest of North America has grown through time as a result of: A. magmatic addition. B. accretion. C. volcanism. D. erosion.

15. Most new continental crust is produced: A. at spreading centers. B. along continent–continent collisional boundaries. C. in subduction zones. D. along transform boundaries.

16. The crust composing exotic terranes is 16. The crust composing exotic terranes is the adjacent continental crust. A. different from B. similar to C. Neither. Exotic terranes are composed of mantle.

17. Orogeny includes all of the following except: A. folding. B. faulting. C. erosion. D. magmatic addition. E. metamorphism.

18. During the Paleozoic, North America was part of: A. Gondwana. B. Laurentia. C. Baltica.

19. How many supercontinents are hypothesized to have existed in Earth’s history? B. 2 C. 3 D. 4

A. random B. linear C. finite D. continuous 20. Which of the following terms best describes the pattern of tectonic activity represented by the Wilson cycle? A. random B. linear C. finite D. continuous