Geol 1001 fall final 2013

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saiya9
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252895
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Geol 1001 fall final 2013
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2013-12-12 20:37:59
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Amy Luther lsu
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Amy Luther fall final exam 2 questions
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  1. What type of eruption is likely to create textures such as pahoe hoe, a’a’, and columnar joints?
    A.Basaltic lava flow
    B.Rhyolitic lava flow
    C. Gaseous eruption
    D.Rhyolitic lava flow
    A.Basaltic lava flow
    (this multiple choice question has been scrambled)
  2. Which type of lava has the highest viscosity?
    A) Basalt
    B) Rhyolite
    C)Andesite
    D)Sandstone
    B) Rhyolite
    (this multiple choice question has been scrambled)
  3. Which of these is a pyroclastic material?
    A) a volcanic mudflow
    B)a batholith
    C) a basalt lava flow
    D)volcanic ash
    E) a diorite sill
    D)volcanic ash
    (this multiple choice question has been scrambled)
  4. Volcanoes with steep slopes that form from the accumulation of viscous lava and pyroclastic flows are:
    A) hydrothermal volcanoes
    B) shield volcanoes
    C) stratovolcanoes
    d) none of the above
    C) stratovolcanoes
    (this multiple choice question has been scrambled)
  5. The steepness of slopes on a volcanic mountain is determined primarily by:
    A) the amount of rainfall in the area
    B) the viscosity of eruptive products
    C) none of these
    D) the force with which the magma is pushed upward
    E) the initial temperature of the lava
    B) the viscosity of eruptive products
    (this multiple choice question has been scrambled)
  6. The type of rock which is not a common volcanic rock is:
    A) none of these
    B) gabbro
    C) rhyolite
    D) andesite
    E) basalt
    B) gabbro
    (this multiple choice question has been scrambled)
  7. The type of volcanic hazard that involves a mudflow made of ash is called a:
    A)  lahar
    B)  tsunami
    C)  pyroclastic flow
    D) debris avalanche
    E) lava bomb
    A)  lahar
    (this multiple choice question has been scrambled)
  8. True or false: A volcanic eruption can cause global cooling?
    a) True
    b) False
    a) True
  9. What signs do scientists look for when predicting volcanic eruptions?
    a) changes in earthquake activity
    b) changes in shape
    c) increases in gas and steam emission
    d) All of the above are correct.
    d) All of the above are correct.
  10. Which of the following definitions most accurately pertains to weathering?
    A) the sole process by which regolith becomes soil
    B)none of these statements defines weathering
    C) the downslope movement of loose material under the influence of gravity
    D) the movement of sediment by surface processes involving wind, water, and ice
    E) the physical or chemical breakdown of rock exposed to air, water, and organic matter
    E) the physical or chemical breakdown of rock exposed to air, water, and organic matter
    (this multiple choice question has been scrambled)
  11. Which of these is NOT considered sediment?
    A) Shell fragments
    B) Broken off bedrock
    C) Loose fragments of rocks or minerals
    D) Precipitate
    E) Soil
    E) Soil
    (this multiple choice question has been scrambled)
  12. Which of the following is NOT true of frost wedging in rocks?
    A) it is a form of physical weathering
    B) it only occurs in the polar regions on Earth
    C) it is also called “freeze and thaw”
    D) it increases surface area available for chemical weathering
    E) it is a direct result of water in cracks freezing and expanding by 9% in volume
    B) it only occurs in the polar regions on Earth
    (this multiple choice question has been scrambled)
  13. Chemical weathering involves the breakdown of material due to _____________.
    a. mechanical breakdown of rock
    c. interaction with molten rock
    b. baking in the hot sun
    d. interaction with water or air
    d. interaction with water or air
  14. Why does differential weathering occur?
    A. Chemical weathering attacks some layers, and physical weathering attacks the others.
    B. Some types of rocks don’t weather at all, thus producing cliffs.
    C. Different minerals have different resistances to weathering.
    D. The cliffs formed by chemical weathering protect the rocks below.
    C. Different minerals have different resistances to weathering.
    (this multiple choice question has been scrambled)
  15. What does the presence of a thick, mature soil suggest about the region?
    A) The region is likely very arid.
    B) The region is dynamic, changing often.
    C) The region has been stable for a long period of time.
    D) The region is likely glaciated.
    C) The region has been stable for a long period of time.
    (this multiple choice question has been scrambled)
  16. Which of these locations is least likely to develop a soil?
    A) A sloped region distant from an active river
    B) A mountainside
    C) A floodplain
    D) A flat region distant from an active river
    D) A flat region distant from an active river
    (this multiple choice question has been scrambled)
  17. The zone of leaching is the area in which _______________.
    A. organic matter gathers to create a soil horizon
    B. weathered bedrock forms a soil horizon
    C. minerals are dissolved and removed from soil
    D. minerals are precipitated and added to soil
    C. minerals are dissolved and removed from soil
    (this multiple choice question has been scrambled)
  18. The zone of leaching is the area in which _______________.
    a. weathered bedrock forms a soil horizon
    b. organic matter gathers to create a soil horizon
    c. minerals are precipitated and added to soil
    d. minerals are dissolved and removed from soil
  19. Which of the following does NOT affect soil thickness?
    A. vegetation type
    B. time
    C. types of animals
    D. climate
    C. types of animals
    (this multiple choice question has been scrambled)
  20. Approximately how much of the Earth’s crust is made up of sedimentary rocks?
    A) 5%
    B) 25%
    C) 50%
    D) 95%
    E) 75%
    A) 5%
    (this multiple choice question has been scrambled)
  21. Which choice is NOT one of the five steps in making a clastic sedimentary rock?
    A) Thermal expansion
    B) Deposition
    C) Erosion
    D) Transportation
    E) Lithification
    A) Thermal expansion
    (this multiple choice question has been scrambled)
  22. What causes sediment deposition?
    A) Water or wind velocity increases and sediment settles out of solution
    B) Water or wind velocity drops and sediment settles out of solution
    C) Debris separates from the substrate.
    D) Clasts compact and squeeze out water and air.
    B) Water or wind velocity drops and sediment settles out of solution
    (this multiple choice question has been scrambled)
  23. Match the sedimentary rock type shale with the corresponding grain size below:
    A) clay
    B) sand
    C) pebble
    D) silt
    E) boulder
    A) clay
    (this multiple choice question has been scrambled)
  24. Which of these indicates the rock was deposited close to the source?
    A) Abundant silt
    B) Hematite cement
    C) Well-sorted grains
    D) Well-rounded grains
    E) Angular grains
    E) Angular grains
    (this multiple choice question has been scrambled)
  25. How are clastic sedimentary rocks classified?
    A) Foliation
    B) Composition
    C) Texture
    D) Grain size
    E) Age
    D) Grain size
    (this multiple choice question has been scrambled)
  26. The remains of sea organisms with shells made of silica accumulate on ocean bottoms as biochemical sediment that eventually forms a type of rock called:
    A) chert
    B) sandstone
    C) gneiss
    D) rock salt
    E) limestone
    A) chert
    (this multiple choice question has been scrambled)
  27. Which process forms chemical sedimentary rocks?
    A) Growth of shell masses.
    B) Precipitation of minerals from a solution.
    C) Accumulation or alteration of organic matter.
    D) Cementation of loose fragments produced by weathering.
    B) Precipitation of minerals from a solution.
    (this multiple choice question has been scrambled)
  28. The two possible forms of sediment production that allow CaCO3 to form are:
    A) biochemical and chemical
    B) chemical and clastic
    C) clastic and organic
    D) biochemical and clastic
    A) biochemical and chemical
    (this multiple choice question has been scrambled)
  29. The type of sedimentary structure that describes a layer of sediment in which the grain size steadily decreases from the bottom to the top of the layer is called:
    A) graded bedding
    B) a bedding plane
    C) mud cracks
    D) bedding
    E) cross-bedding
    A) graded bedding
    (this multiple choice question has been scrambled)
  30. Mud cracks are a special type of sedimentary structure that allows you to tell what about a layer of sediment?
    A) Type of organic material that was present at the time of deposition
    B) The age of the sediment
    C) The direction of current flow
    D) Which way is right-side up
    D) Which way is right-side up
    (this multiple choice question has been scrambled)
  31. Which of the following is NOT a type of sedimentary structure?
    A) graded bedding
    B) rock color
    C) mudcracks
    D) ripple marks
    E) cross-bedding
    B) rock color
    (this multiple choice question has been scrambled)
  32. Sedimentary bedding indicates:
    A) Changes in the processes that deposited sediment.
    B) That sediment is deposited by flowing water.
    C) That sediment was deposited in the ocean basins.
    D) That the sediment dried out after it was deposited.
    A) Changes in the processes that deposited sediment.
    (this multiple choice question has been scrambled)
  33. What is the most likely depositional environment of an outcrop of sandstone with 3 meter tall cross-beds?
    A) Lake
    B) Desert
    C) Deep ocean
    D) River
    E) Beach
    B) Desert
    (this multiple choice question has been scrambled)
  34. If you see a sequence of sedimentary rocks with limestone at the base, shale above and sandstone on top, what has happened to sea level over time?
    A) Sea level fell
    B) Sea level remained the same
    C) You cannot tell from this information
    D) Sea level rose
    A) Sea level fell
    (this multiple choice question has been scrambled)
  35. What is the current depositional environment of southern Louisiana?
    A) Lake
    B) Desert
    C) Beach
    D) Delta
    E) River
    D) Delta
    (this multiple choice question has been scrambled)
  36. Which of these is not a continental depositional environment?
    A) Desert
    B) Lake
    C) Delta
    D) River
    C) Delta
    (this multiple choice question has been scrambled)
  37. Which of the following statements about metamorphism is FALSE?
    A) metamorphic means “change of form”
    B) during metamorphism, existing minerals are transformed into new minerals
    C) metamorphism involves melting of existing rocks to form new minerals
    D) metamorphism is controlled by pressure, temperature, fluids, and time
    E) metamorphic rocks form from existing sedimentary, igneous, or metamorphic rocks
    C) metamorphism involves melting of existing rocks to form new minerals
    (this multiple choice question has been scrambled)
  38. The preexisting rock that is subsequently altered to form a metamorphic rock is termed a ____________.
    a. parent rock
    c. protolith
    b. source rock
    d. premetarock
    c. protolith
  39. Which of these is most likely to change the composition of a metamorphic rock?
    A) Contact metamorphism
    B) Pressure decrease
    C) Interaction with hydrothermal fluids
    D) Compression
    E) Temperature increase
    C) Interaction with hydrothermal fluids
    (this multiple choice question has been scrambled)
  40. Which of these is mostly likely to create a preferred alignment of minerals in a metamorphic rock?
    A) Temperature increase
    B) Compression
    C) Interaction with hydrothermal fluids
    D) Pressure decrease
    E) Contact metamorphism
    B) Compression
    (this multiple choice question has been scrambled)
  41. Which factor has the strongest effect on the degree of metamorphism?
    A) Stresses
    B) Compression
    C) Pressure
    D) Interaction with hydrothermal fluids
    E) Temperature
    E) Temperature 
    (this multiple choice question has been scrambled)
  42. How are metamorphic rocks classified?
    A) Grain size
    B) Color
    C) Texture
    D) Hardness
    E) Mineralogy
    C) Texture
    (this multiple choice question has been scrambled)
  43. Which mineral is stable at many temperatures and pressures?
    A) Diamond
    B) Feldspar
    C) Clay
    D) Quartz
    E) Muscovite
    D) Quartz
    (this multiple choice question has been scrambled)
  44. Metamorphism of limestone produces:
    A) granulite
    B) marble
    C) quartzite
    D) hornfels
    E) slate
    B) marble
    (this multiple choice question has been scrambled)
  45. Which series goes from lowest to the highest metamorphic grade for foliated metamorphic rocks?
    A) Slate/ Gneiss / Schist / Migmatite
    B) Migmatite / Gneiss / Schist / Slate
    C) Migmatite / Schist / Slate / Gneiss
    D) Slate / Schist / Gneiss / Migmatite
    D) Slate / Schist / Gneiss / Migmatite
    (this multiple choice question has been scrambled)
  46. Which process can increase the temperature of a rock without increasing the pressure?
    A) Tectonic burial
    B) Transportation
    C) Magma intrusion
    D) Burial of a rock in a depositional basin
    C) Magma intrusion
    (this multiple choice question has been scrambled)
  47. Which type of metamorphism is most likely to create foliated rocks?
    A) Hydrothermal metamorphism
    B) Regional metamorphism
    C) Contact metamorphism
    B) Regional metamorphism
    (this multiple choice question has been scrambled)
  48. Which plate boundary is most likely to have regional metamorphism?
    A) Divergent boundary
    B) Hot spot boundary
    C) Transform boundary
    D) Convergent boundary
    D) Convergent boundary
    (this multiple choice question has been scrambled)
  49. What is the actual location of an earthquake called?
    A) Fault scarp
    B) Fault plane
    C) Focus (hypocenter)
    D) Epicenter
    C) Focus (hypocenter)
    (this multiple choice question has been scrambled)
  50. Which seismic wave travels the fastest?
    A) Speed wave
    B) P-wave
    C) Surface wave
    D) S-wave
    B) P-wave
    (this multiple choice question has been scrambled)
  51. What seismic wave cannot travel through liquid?
    A) Speed wave
    B) S-Wave
    C) Surface wave
    D) P-Wave
    B) S-Wave
    (this multiple choice question has been scrambled)
  52. Of the following, which causes the most earthquakes?
    a. meteorite impacts  
    c. the explosion of a volcano
    b. a sudden slip on an existing fault
    d. a giant landslide
    b. a sudden slip on an existing fault
  53. Seismometers, being able to detect ground movements of a millionth of a millimeter, are useful to governments worldwide for detecting not only earthquakes but _______________.
    a. landslides 
    c. avalanches
    b. nuclear bomb tests
    d. bombing raids
    b. nuclear bomb tests 

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