Geology Test 3

16 Questions

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Geology Quizzes & Trivia

Help with geology test 3


Questions and Answers
  • 1. 
    A member of a group of sedimentary rocks that consist primarily of microscopic   silica crystals. ----- may be either organic or inorganic, but the most common forms are inorganic. 
  • 2. 
    A detrital sedimentary rock composed of clay-sized particles (<0.002 mm).
  • 3. 
    Clastic rocks composed of particles that range in diameter from 1/16 millimeter to 2 millimeters in diameter. ------- make up about 25% of all sedimentary rocks. 
  • 4. 
    A sedimentary rock composed of detrital sediment particles less than 0.004 millimeter in diameter. ----- tends to be red, brown, black, or gray, and usually originates in relatively still waters. 
  • 5. 
    A coarse-grained, foliated metamorphic rock marked by bands of light-colored minerals such as quartz and feldspar that alternate with bands of dark-colored minerals. This alternation develops through metamorphic differentiation.
  • 6. 
    A hard, dark-colored, dense metamorphic rock that forms from the intrusion of magma into shale or basalt.
  • 7. 
    A coarse-grained, nonfoliated metamorphic rock derived from limestone or dolostone.
  • 8. 
    A high-grade metamorphic rocks that contains granitic layers or regions that in most cases formed by partial melting of the rock. 
  • 9. 
    A foliated metamorphic rock that develops from slate and is marked by a silky sheen and medium grain size. 
  • 10. 
    An extremely durable, nonfoliated metamorphic rock derived from pure sandstone and consisting primarily of quartz. 
  • 11. 
    A coarse-grained, strongly foliated metamorphic rock that develops from phyllite and splits easily into flat, parallel slabs. 
  • 12. 
    A fine-grained, foliated metamorphic rock that develops from shale and tends to break into thin, flat sheets. 
  • 13. 
    Chemical limestone is precipitated from____.
    • A. 

      Halite

    • B. 

      Chert

    • C. 

      Dolomite

    • D. 

      Calcite

  • 14. 
    Silica is precipitated from------.
    • A. 

      Halite

    • B. 

      Calcite

    • C. 

      Chert

    • D. 

      Dolomite

  • 15. 
    What are the two important evaporites that form the subset of precipitation.
  • 16. 
    What are the important replacement minerals in diagenesis? What do they form? Answer Example:  Answers for part 1 Answers for Part 2