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Unformatted text preview: Name: Geology 101 Exam 2 Monday, October 27, 2008 This exam consists of 40 multiple-choice questions. Only one answer of the four given is correct. Blacken the appropriate circle on your computer form to indicate your selection. Erase completely any stray marks on the form. NOTE : There are only four responses on your exam and Fve on the computer form. Never blacken the Ffth circle on the computer form. 1. During metamorphism, the ______ of a rock may change. a. mineralogy b. texture c. chemical composition d. mineralogy, texture, and chemical composition 2. What type of metamorphism is caused by high temperature and high pressure imposed over a large volume of crust? a. metasomatism b. contact c. regional d. cataclastic 3. What type of metamorphism is caused by igneous intrusions? a. burial b. contact c. regional d. cataclastic 4. Metamorphic rocks: a. often contain fossils b. commonly are layered c. are rarely found associated with convergent plate boundaries d. none of the above 5. Which of the following metamorphic rocks forms by subduction of oceanic crust? a. amphibolite b. eclogite c. hornfels d. granulite 6. In what plate tectonic setting(s) does regional metamorphism occur? a. divergent plate margins b. transform plate margins c. convergent plate margins d. all of these 7. Which of the following sequences describes the metamorphic changes in shale with increasing pressure and temperature? a. schist gneiss slate b. gneiss slate schist c. slate schist gneiss d. gneiss schist slate 8. The principle of superposition states that _______. a. sediments are deposited as horizontal layers b. the present is the key to the past c. undisturbed sedimentary layers get younger from bottom to top d. a fault that cuts a sedimentary rock is younger than the rock 9. Fossils became abundant in the geologic record about ______ years ago. a. 540 million b. 250 million c. 65 million d. 10 thousand 10. Which of the following varies the rate of radioactive decay? a. a change in temperature b. a change in pressure c. a change in humidity d. none of these 11. Which of the following radioactive isotopes is the most useful for dating very young (<10,000 year old) wood and charcoal. a. rubidium-87 b. carbon-14 c. potassium-40 d. uranium-238 12. Human beings (Homo Sapiens) evolved during which geologic era? a. Cenozoic b. Mesozoic c. Paleozoic d. all of these 7. Which of the following sequences describes the metamorphic changes in shale with increasing pressure and temperature?...
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- Fall '07