Exam3a_S08_KEY[1]

Exam3a_S08_KEY[1] - Geology 101 Spring 2008 Section 001...

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1 Geology 101 Spring 2008 Section 001 Name (print) ____KEY_____________ TEST #3 Version: A I. Multiple Choice. Read each question carefully and pick the BEST answer. Clearly mark your SCANTRON to indicate your choice. (100 questions; 1 pt each) 1. Heat from a pluton bakes and alters surrounding country rock in a process called _______. 1) bolide metamorphism 2) contact metamorphism 3) differential metamorphism 4) lithostatic metamorphism 5) none of the above 2. Possible heat sources for metamorphism include _______. 1) igneous pluton 2) hydrothermal fluids 3) magma intrusion 4) all of the above 5) none of the above 3. A _____ is an example of a low energy sedimentary environment 1) steep mountain stream 2) beach sands deposited by wave action 3) deep marine 4) all of the above 4. The slope of crossbeds ____ in the direction of fluid flow. 1) shallow 2) steepen 3) remains constant 4) none of the above 5. The gravitational pull measured over a dense, buried ore-body is typically _______ than the surrounding rock and therefore yields a __________ gravitational anomaly. 1) larger, neutral 2) larger, negative 3) smaller, positive 4) larger, positive 6. The boundaries between the four major layers of the Earth’s interior (e.g., crust, mantle, outer and inner core) are defined using _______. 1) elastic rebound theory 2) seismic wave data 3) drilling, e.g., drill cores 4) the structure of Jupiter as an analog 5) all of the above
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2 7. An earthquake with a Richter magnitude M = 8 has wave amplitudes that are _____ larger than those of an earthquake with a Richter magnitude M = 6. 1) 2 times 2) 200 times 3) 100 times 4) 900 times 5) cannot determine 8. An earthquake with a Mercalli index of VIII (eight) is _____ larger than an earthquake with a Mercalli index of VI (six) 1) 2 times 2) 200 times 3) 100 times 4) 900 times 5) cannot determine 9. An earthquake with a Richter magnitude M = 8 has an energy output that is _____ larger than those of an earthquake with a Richter magnitude M = 6. 1) 2 times 2) 200 times 3) 100 times 4) 900 times 5) cannot determine 10. Lithostatic stress that exceeds the rock strength _______ . 1) increases the density of a rock 2) results in uniform strain. 3) increases with depth 4) reduces the volume of a rock 5) all of the above 11. Moving from granite to the ocean, _______. 1) P-wave velocities decrease 2) P-wave propagation terminates 3) S-wave velocities increase 4) none of the above 5) all of the above 12. During _____ rebound, weathering a mountain summit causes the mountain to move ___ in response to erosion and the valley/basin surrounding the mountain moves _____ in response to sediment deposition. 1) isostatic; down; up 2) elastic; down; up 3) isostatic; up; down 4) elastic; laterally; up 5) none of the above
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3 13. Ripple marks _______. 1)
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Exam3a_S08_KEY[1] - Geology 101 Spring 2008 Section 001...

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