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LSU GEOL 1001 - CHAPTER 4 Plate Tectonics, - Exam # 2 questions and answer
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- Louisiana State University
LSU GEOL 1001 - CHAPTER 4 Plate Tectonics, - Exam # 2 questions and answer
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LSU Geology 1001 Exam 3 questions and answers written exam update What are the three main types of stress? - compression, tension, and shear What type of rock forms through solid -state alteration of a previously existing rock, by heating, pressure, and/or fluid chemistry? - metamorphic Which numbered site is likely to have a thin sequence of sediments over crystalline rocks of the basement? - 2, the continental platform The southern San Andreas fault near Los Angeles is considered a candidate for a major earthquake because: - this segme nt of the fault has not moved for more than 100 years Which of the following is most likely to occur at shallow crustal levels? - brittle deformation What geologic events are expressed in this cross section showing the interpreted geologic setting of the eastern U.S. during middle Paleozoic time? - all of these What location on the surface would provide easily gathered information about what is below the surface, without using expensive machines? - mine dump at A and rocky hill at B What is true of refl ection versus refraction? - All of these are true. The Himalaya are: - the highest mountain range in the world and contain Earth's highest peak The shaded areas on this map have significant earthquake risks because: - stress generated on far-off plate bo undaries can reactivate ancient faults Which of the following statements is NOT true about clastic sedimentary rocks? - To be called a sandstone, quartz must make up more than 95 percent of the grains. The top cross section below shows earthquakes along the San Andreas fault before October 17, 1989 and the one on the bottom shows earthquakes along the same fault after that date. These two cross sections illustrate that: - all of these Which of the following is a major source of earthquakes associated wit h continental collisions? - all of these Which of the following is a characteristic of S -waves? - all of these Which statement best describes how region 5 will look in the future? - close to sea level because it will be underlain by a combination of oceanic crust and thin continental crust In what sites can extension occur near a subduction zone? - all of these Which of these numbered features is on the continental shelf? - 1 The image, indicating the path of a seismic wave through a segment of the Earth, shows: - The image shows all of these In which of the following environments is the lithosphere likely to be thinnest? - beneath a mid -ocean ridge How wide do you think the narrow ocean between the central and eastern continents will be 20 million years in the future? - nearly twice as wide as it is today What will happen during movement on these normal faults ? - the fault blocks will rotate in the same direction, like books sliding on a shelf Overall, a P -wave increases in velocity with depth. This implies that: - rocks are increasing in density with depth Hot spots have helped define the outlines of the con tinents by: - shaping the boundaries along which continents separate, due to location of the rift arms Which of the following rocks cannot be metamorphosed? - all of these can be metamorphosed The refracted wave shown in the diagram has passed into a mat erial that caused it to: - slow down Which of the following describes lineation? - All of these describe lineation. On this map of the area around Yellowstone, which feature is interpreted to record the position of the hot spot over time? - 2, the Snake River Plain Hot spots form linear island chains because: - the plate moves relative to the underlying hot spot Which of these numbers is near a continental shelf? - 3 From the answers provided, select the oldest environment represented by this rock sequence. - a river system What regional effects influence continental interiors? - all of these
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