Geology Test II-b

33 Questions  I  By Shopkin6
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Geology Quizzes & Trivia
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  • 1. 
    Rocks that are high in silca content melt at lower temperatures than rocks with low silica content:
    • A. 

      Ture

    • B. 

      False


  • 2. 
    Rocks with high silica content have higher specific gravity than rocks with low silica content:
    • A. 

      True

    • B. 

      False


  • 3. 
    One way to decompress rocks and causing melting is to
    • A. 

      Open a rift in the seafloor or on the continent

    • B. 

      Subduct some seafloor down a trench

    • C. 

      Bury the seafloor under sediments

    • D. 

      Bury the crust under lava flows


  • 4. 
    A batholith is
    • A. 

      Made up of a single igneous intrusion

    • B. 

      A volcanoclastic rock body

    • C. 

      A common feature at midocean ridges

    • D. 

      A feature that forms when seafloor is subducted under a continent


  • 5. 
    A sill is an igneous intrusion that
    • A. 

      Is parallel to the host sedimentary beds

    • B. 

      Intersects host sedimentary beds at a high angle

    • C. 

      Is an extrusive igneous rock

    • D. 

      Forms through cataclasis


  • 6. 
    All other factors being equal, intrusive rocks that form deep within Earth ________  than intrusive rocks that cool near the surface
    • A. 

      Are more felsic

    • B. 

      Contain smaller portions of volatiles

    • C. 

      Cool more slowly

    • D. 

      Cool more rapidly


  • 7. 
    An island volcanic occurs at ______
    • A. 

      The Andes Mountains

    • B. 

      The Aleutian Islands of Alaska

    • C. 

      Mt. Saint Helens

    • D. 

      Hawaii


  • 8. 
    Coarse grained granite is most similar in mineral composition to fine-grained ________
    • A. 

      Basalt

    • B. 

      Rhyolite

    • C. 

      Andesite

    • D. 

      Komatiite


  • 9. 
    In 79 C.E. the citizens of Pompeii in the Roman Empire were buried by pyroclastic debris derived from an eruption of
    • A. 

      Mt. Olympus

    • B. 

      Olympus Mons

    • C. 

      Mt. Vesuvius

    • D. 

      Mt. St. Helens


  • 10. 
    If a volcano is erupting a gassy, felsic magma, then it is most likely to be _____.
    • A. 

      An "effusive" eruption

    • B. 

      An explosive eruption

    • C. 

      None of the above


  • 11. 
    The majority of rocks that occur on the surface of the Earth are
    • A. 

      Intrusive igneous rocks

    • B. 

      Extrusive igneous rocks

    • C. 

      Sedimentary rocks

    • D. 

      Metamorphic rock


  • 12. 
    A void left by an air bubble that was trapped when lava solidified into rock is termed ________.
    • A. 

      A vesicle

    • B. 

      A lahar

    • C. 

      An effusive chondrite


  • 13. 
    The volcanoes of the US Pacific Northwest are active examples of ____________.
    • A. 

      Continental rift volcanism

    • B. 

      Island arc volcanism

    • C. 

      Continental arc volcanism

    • D. 

      Continental hot-spot volcanism


  • 14. 
    Which of the following is characterized of volcanism in continental rifts?
    • A. 

      Large volumes of mafic magma in the crust

    • B. 

      Possible presence of a super plume

    • C. 

      Eruptions of basalt that cover broad areas

    • D. 

      All of the above

    • E. 

      None of the above


  • 15. 
    Which of the following volcanic settings is NOT likely to produce pillow basalt?
    • A. 

      Island arcs

    • B. 

      Oceanic hot spots

    • C. 

      Mid ocean ridges

    • D. 

      Continental hot spots


  • 16. 
    Olivine is the ________ mineral to crystallize out of a melt at depth and the __________ mineral to weather away at the surface
    • A. 

      First/last

    • B. 

      Last/first

    • C. 

      Last/last

    • D. 

      First/first


  • 17. 
    The Andes are active examples of _______________
    • A. 

      Continental rift volcanism

    • B. 

      Island arc volcanism

    • C. 

      Continental arc volcanism

    • D. 

      Continental hot spot volcanism


  • 18. 
    The slow build up and sudden release of stress of faults in earthquakes is described as_______
    • A. 

      Stick-slip behavior

    • B. 

      Fault throw

    • C. 

      Normal faulting

    • D. 

      Reverse faulting


  • 19. 
    "Seismic Waves" refer to
    • A. 

      Episode of ground shaking

    • B. 

      Energy transmitted as a result of an earthquake

    • C. 

      Earthquake activity

    • D. 

      Sudden slip along an existing fault


  • 20. 
    Reverse faulting is generally associated with crustal
    • A. 

      Extension

    • B. 

      Shortening

    • C. 

      Compression

    • D. 

      Decompression

    • E. 

      Both b and c


  • 21. 
    Thrust faulting differ from reverse faults in the _____________.
    • A. 

      Sense of the motion or "throw"; and the hanging wall moves up relative to the footwall in thrust faults, and down relative to the footwall in reverse faults

    • B. 

      Sense of crustal stress

    • C. 

      The angle of the faulting plane with a horizontal plane; thrust faults are steeper than reverse faults

    • D. 

      The angle of the fault plane makes with the horizontal plane; reverse faults are steeper than thrust faults


  • 22. 
    Why doesn't slip occur on faults all the time?
    • A. 

      Resistance due to decompression

    • B. 

      Resistances due to friction

    • C. 

      Resistance due to viscosity

    • D. 

      Temperature effects


  • 23. 
    Hydrolysis, oxidation, and chelation are all examples of __________.
    • A. 

      Erosion

    • B. 

      Chemical weathering

    • C. 

      Physical weathering

    • D. 

      Deposition


  • 24. 
    Which of these is not considered a type (or class) of sedimentary rocks?
    • A. 

      Clastic

    • B. 

      Biochemical

    • C. 

      Organic

    • D. 

      Chemical

    • E. 

      None of the above


  • 25. 
    Which of the following represents the correct ordering, from fine to coarse, for sedimentary detritus?
    • A. 

      Clay, silt, sand, cobble, gravel, boulder

    • B. 

      Clay, sand, silt, boulder, cobble, gravel

    • C. 

      Sand, silt, clay, gravel, boulder, cobble

    • D. 

      Clay, silt, sand, gravel, cobble, boulder


  • 26. 
    When sediments first accumulate, they almost always contain ______
    • A. 

      Quartz

    • B. 

      Calcite

    • C. 

      Fossils

    • D. 

      Water


  • 27. 
    Which of the following sediments might not contain much water when they form?
    • A. 

      Pyroclastic deposits

    • B. 

      Aeolian deposits

    • C. 

      Siliceous oozes

    • D. 

      A & B


  • 28. 
    Diagenisis is the process that converts unconsolidated sediments to
    • A. 

      Rocks

    • B. 

      Schists

    • C. 

      Melts

    • D. 

      Ore deposits


  • 29. 
    The protolith is the rock that
    • A. 

      Formed when the earth was cooled

    • B. 

      Was metamorphosed to make the present rock

    • C. 

      Formed when diagenisis was completed

    • D. 

      That was deposited by wind


  • 30. 
    If we could identify the protolith of a metamorphic rock, we could
    • A. 

      Determine the metamorphic grade

    • B. 

      Determine the age of the rock

    • C. 

      Learn something about pre-metamorphic process

    • D. 

      Determine how deeply it has been buried


  • 31. 
    When a limestone is metamorphosed a ___________ is produced
    • A. 

      Slate

    • B. 

      Gneiss

    • C. 

      Amphibolite

    • D. 

      Marble


  • 32. 
    A schist is formed at _____________temperature than a slate
    • A. 

      Higher

    • B. 

      Lower

    • C. 

      The same


  • 33. 
    Which of the following metamorphic rocks would tell you the most about metamorphic conditions?
    • A. 

      A marble

    • B. 

      A quratzite

    • C. 

      A slate

    • D. 

      The same information


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