exam I f03 - Geological Disasters Exam I September 25, 2003...

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1 Geological Disasters Exam I September 25, 2003 Instructions: Turn in only the opscan sheet when you are finished; be sure that your name and your student number is correct on the opscan. Choose the best answer. 1. What are the correct axis labels for the location where the question marks occur on the diagram below? Most Fear Least Fear ? ? 1. not observable, not probable 4. observable, probable 2. observable, not controlable 5. not controable, probable 3. controlable, probable 6. not observable, not controlable 2. ? Amphibole Quartz Albite Anorthite K-feldspar Pyroxene ? Muscovite Diorite Andesite Granite Rhyolite Basalt Gabbro On the diagram above, which minerals fit into the blank spaces, where the question marks are? 1. Biotite, Plagioclase 4. Plagioclase, Sanadine 2. Biotite, Olivine 5. Chrysotile, Talc 3. Calcite, Dolomite 3. Which site has volcanic features caused by a mantle hot spot? 1. Aleutian Islands 4. Hawaii 2. Japan 5. Mt. St. Helens 3. Krakatau
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2 4. The lithosphere is found 1. in the earth’s mantle and crust. 4. in the earth’s outer core. 2. in the earth’s upper atmosphere. 5. in the earth’s inner core. 3. at the base of the continental crust. 5. Most, but not all, volcanoes occur 1. in California. 4. near faults. 2. near ocean basins. 5. near plate boundaries. 3. on continents. 6. A rock consisting of a coarse-grained mixture of potassium feldspar, quartz, and muscovite would be called a 1. granite 4. diorite 2. gabbro 5. andesite 3. rhyolite 6. basalt 7. According to the concept of isostacy 1. continents float up on the mantle because they have a lower density. 2. warm, dry parts of the lithosphere dissolve in the asthenosphere. 3. warm, low density oceanic crust sinks at subduction zones. 4. the earth's surface will eventually become nearly flat. 5. the inner core is solid. 8. An instrument that is used to identify minerals based on their crystal structure is a(n) 1. x-ray diffractometer. 4. electron microprobe. 2. seismograph. 5. linear accelerator. 3. scanning electron microscope. 6. x-ray photoelectron spectromoter. 9. A sheet of rock formed by the injection and cooling of magma in a vertical fracture is called a 1. sill. 4. batholith.
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exam I f03 - Geological Disasters Exam I September 25, 2003...

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