Geology 100 Self-Test 5

Answer the questions below and then click "submit" to send your answers.

  1. Explain how erosion and isostasy create a relatively thin and stable continental crust.

    2. Your answer:

  2. How do the sequences of sedimentary rocks in cratons differ from those in mountain belts?

    3. Your answer:

  3. What is the sequence of events that accounts for a mountain belt that is bounded on either side by a craton?

    4. Your answer:

  4. The mountain belt that forms the western part of North America is called the

    5. Your answer:
    Appalachians
    North American Cordillera
    Andes
    Himalaya

  5. The craton

    6. Your answer:
    covers the central part of the United States and Canada
    has only 1,000-2,000 m of sedimentary rock overlaying basement rock
    has rock beneath any sedimentary rock that is old plutonic and metamorphic rock
    all of the above

  6. Which is not a stage in the history of a mountain belt?

    7. Your answer:
    subsidence
    orogenic
    accumulation
    uplift and block-faulting

  7. To explain fold and thrust belts, simultaneous normal faulting, and how once deep-seated metamorphic rocks rise to an upper level in a mountain belt, geologists use a model called

    8. Your answer:
    ectonism
    rogeny
    gravitational collapse and spreading
    faulting

  8. Which is not a type of terrane?

    9. Your answer:
    accumulated
    exotic
    suspect
    accreted

  9. Which of the following is a source for terranes?

    10. Your answer:
    microcontinents
    ocean crustal fragments
    fragments of distant continents
    all of the above

  10. Place these stages of mountain belt development in order: a. uplift and block faulting b. orogeny c. accumulation d. erosion to a craton

    11. Your answer:
    a,b,c,d
    c,b,a,d
    a,d,c,b
    d,b,c,a