Multiple Choice Questions Metamorphic Rocks - Chapter 7

Each chapter will include a few questions designed to test your knowledge of material covered in the chapter and in the Internet-based resources. Your answers are not being recorded. Try the following.

  1. In regional metamorphism the source of increased temperature and pressure is _________ .

    a local intrusive heat source
    impact metamorphism
    the increase in temperature with increasing depth of burial
    due to increased rate of radioactive decay

  2. A Geologist suffers from a black eye after yelling "Gneiss!!!" to a classmate, who happened to be sunning on a large boulder. The geologist really meant to tell the classmate that the rock they were laying on _______________ .

    would fizz with the application of acid
    is commonly used in billiard table construction
    demonstrates schistosity
    is a high-grade, silicate-rich, mineralogically banded metamorphic rock

  3. A combination of shallow earthquakes, tension, and contact metamorphism characterizes ___________ .

    transform fault margins
    spreading centers
    continent/continent margins
    subduction type margins

  4. In contact metamorphism there is a ____________ .

    local heat source
    frictional heat source
    regional heat source

  5. Within a 50 mile traverse you walk from a shale into a slate into a phyllite. You are walking in the direction of _________ .

    increasing metamorphic grade
    decreasing metamorphic grade
    increasing degree of contact metamorphism

  6. Marble is a metamorphic rock that forms from a ___________ parent .

    granite
    limestone
    sandstone
    shale

  7. The pressure and heat that drive metamorphism result from which three forces?

    The internal heat of the Earth, the weight of overlying rocks, and horizontal pressures developed as rocks become deformed
    The weight of the overlying rocks, solar heating, and nuclear fusion
    Horizontal pressures developed as rocks deform, bonding, heat released during crystallization
    Internal heat of the Earth, nuclear fission, heat released during chemical weathering

  8. A geothermometer is?

    a device that measures temperature in deep drill holes
    a device that measures current rock temperatures at the surface
    a mineral assemblage that can reveal the minimum temperature attained during heating
    the range of temperatures experienced by a rock during its geologic history

  9. Which type of pressure will result in the alignment of metamorphic minerals?

    contact pressure
    directed pressure
    confining pressure
    chemical pressure

  10. During metamorphism, changes in the bulk composition of a rock occur primarily as a result of __________?

    increases in pressure
    increases in temperature
    reaction with hydrothermal fluids
    all of these

  11. What type of metamorphism is caused by high temperature and high pressure imposed over a large volume of crust?

    burial
    contact
    regional
    cataclastic

  12. A rock that has undergone cataclastic metamorphism would most likely display which of the following?

    preserved sedimentary layering
    pulverized rock fragments
    new minerals
    large olivine crystals

  13. What is the most prominent textural feature of regional metamorphic rocks??:

    foliation
    bedding
    cataclasis
    ripples

  14. Which of the following statements about metamorphism of a shale is false?

    with increasing metamorphism, the clay minerals breakdown to form micas
    with increasing metamorphism, the grain size of the minerals gets smaller
    with increasing metamorphism, foliation develops
    with increasing metamorphism, the amount of water decreases

  15. Which mineral is responsible for the strong foliation in a schist?

    quartz
    calcite
    mica
    foliate

  16. Which of the following metamorphic rocks can not form from a shale?

    schist
    marble
    hornfels
    slate

  17. Which of the following metamorphic rocks is not paired with its true parent rock?

    greenstone-basalt
    quartzite - quartz arenite
    schist - shale
    hornfels - dolomite

  18. Which of the following index minerals forms at the highest metamorphic grade?

    chlorite
    sillmanite
    biotite
    garnet

  19. Which of the following processes will cause metamorphism?

    a change in the chemical environment
    an increase in temperature
    an increase in pressure
    all of these

  20. What is the pressure on a rock at 15 kilometers depth?

    about 5 times atmospheric pressure
    about 50 times atmospheric pressure
    about 500 times atmospheric pressure
    about 5000 times atmospheric

  21. ______ is the process where rocks previously metamorphosed under high-grade conditions are later metamorphosed under low-grade conditions.

    metasomatism
    cataclasis
    foliation
    retrograde metamorphism

  22. Metasomatism is ________.

    the change in the bulk composition of a rock during metamorphism
    metamorphism caused by nearby intrusions
    metamorphism caused by tectonic movements along faults
    the parallel alignment of minerals in a metamorphic rock

  23. Hydrothermal metamorphism is very common in which of the following settings?

    at continental collision zones
    along shallow faults
    at mid-ocean ridges
    in mid-continental regions

  24. Metamorphism occurs ______.

    adjacent to igneous intrusions
    along faults
    in subduction zones
    in all of these settings

  25. In which of the following metamorphic environments would you expect to find bedding and other sedimentary structures to be preserved.

    burial metamorphism
    along faults
    contact metamorphism
    regional metamorphism

  26. The parallel alignment of mica in a metamorphic rock is an example of ______.

    porphyroblasts
    bedding
    metasomatism
    foliation

  27. What is the relationship between metamorphic foliation and sedimentary bedding?

    sedimentary bedding is required in order for a rock to develop metamorphic foliation
    sedimentary bedding and metamorphic foliation are two terms for the same phenomenon
    sedimentary bedding and metamorphic foliation are generally parallel
    there is no regular relationship between sedimentary bedding and metamorphic foliation

  28. Which of the following is not used to classify foliated rocks?

    crystal size
    the texture of the parent rock
    the degree to which minerals are segregated into lighter and darker bands
    the metamorphic grade

  29. Which of the following sets is arranged in order of increasing metamorphic grade?

    shale - slate - phyllite
    phyllite - gneiss - schist
    phyllite - slate - schist
    schist - shale - gneiss

  30. Which of the following rocks represents the highest metamorphic grade?

    slate
    schist
    phyllite
    gneiss

  31. Metamorphic rocks with segregated light and dark minerals are called _______.

    slate
    schist
    phyllite
    gneiss

  32. During metamorphism a quartz arenite will change into what type of rock?

    slate
    schist
    quartzite
    gneiss

  33. A normal geothermal gradient is approximately _________ .

    3000 degrees C per km
    300 degrees C per km
    30 degrees C per km
    3 degrees C per km

  34. Which of the following metamorphic rocks forms in the forearc of a subduction zone?

    amphibolite
    blueschist
    quartzite
    gneiss

  35. Which of the following rocks can be considered gradational between an igneous rock and a metamorphic rock?

    geniss
    quartzite
    migmatite
    schist

  36. For the Barrovian sequence given above intensity of metamorphism:

    increases from left to right
    increases from right to left
    cannot be determined from the diagram

  37. In the figure above, the A isograd is the ________ isograd

    amphibole
    muscovite
    biotite
    garnet

  38. In the figure above, what mineral would not be present in zone B?

    garnet
    chlorite
    biotite
    quartz

  39. In the figure above, the C isograd is the _________ isograd

    kyanite
    muscovite
    staurolite
    sillmanite

  40. In the figure above, zone D should contain which of the following minerals?

    amphibole
    sillmanite
    calcite
    kyanite

  41. A rock rich in garnet and pyroxene that forms at extremely high pressures and moderate to high temperatures is called a(n) _________ .

    amphibolite
    hornfels
    granulite
    eclogite

  42. The zeolite facies occurs in which pressure-temperature regime?

    area A
    area B
    area C
    area D

  43. The eclogite facies occurs in which pressure-temperature regime?

    area A
    area C
    area E
    area G

  44. The greenschist facies occurs in which pressure-temperature regime?

    area C
    area D
    area E
    area F

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