Quiz About Characteristics Of Sedimentary Rocks

42 Questions | Total Attempts: 98

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Quiz About Characteristics Of Sedimentary Rocks

Assessment of characteristics of sedimentary rocks.


Questions and Answers
  • 1. 
    Erosion is the:
    • A. 

      Movement of weathered material from its source site.

    • B. 

      Decomposition of rock.

    • C. 

      Disintegration of rock.

    • D. 

      Disintegration of soil.

  • 2. 
    If all of the grains in a sedimentary rock are about the same size, shape, and composition, the rock can be characterized as:
    • A. 

      Cemented.

    • B. 

      Cross-bedded.

    • C. 

      Graded.

    • D. 

      Well sorted.

  • 3. 
    Sediments are classified as:
    • A. 

      Detrital, clastic, and chemical.

    • B. 

      Detrital and clastic.

    • C. 

      Detrital and chemical.

    • D. 

      Organic, particulate, and crystalline.

  • 4. 
    Detrital sediments and rocks are classified by:
    • A. 

      Mineral composition.

    • B. 

      Grain size.

    • C. 

      The conditions in which they formed.

    • D. 

      Mineral composition and grain size.

  • 5. 
    Chemical sedimentary rocks generally have an interlocking grain texture called
    • A. 

      Clastic

    • B. 

      Porphyritic

    • C. 

      Crystalline

    • D. 

      Detrial

  • 6. 
    The properties used to describe detrital sediment are:
    • A. 

      Size

    • B. 

      Sorting

    • C. 

      Rounding

    • D. 

      All answers apply

  • 7. 
    The designation of sediment grain size, from largest to smallest, is
    • A. 

      Clay, silt, sand, gravel

    • B. 

      Gravel, sand, silt, clay

    • C. 

      Gravel, silt, sand, clay

    • D. 

      Clay, sand, gravel, silt

  • 8. 
    Sorting is a result of:
    • A. 

      transportation of sediment by wind

    • B. 

      Transportation of sediment by running water

    • C. 

      Selective transport and deposition

    • D. 

      Transportation of sediment by ice

  • 9. 
    Graded bedding forms when:
    • A. 

      Erosion planes off a portion of the sea bottom

    • B. 

      Sediment is deposited on a steep slope or grade

    • C. 

      Turbidity currents deposit first coarse sediment then fine sediment

    • D. 

      Turbidity currents deposit first fine sediment followed by coarse sediment

  • 10. 
    The presence of mud cracks in a sedimentary rock is a sign that the rock was deposited
    • A. 

      in a region that was drying

    • B. 

      In a desert

    • C. 

      Beneath a glacier

    • D. 

      In a sand dune

  • 11. 
    Oolithic limestone contains small round fossils the make the rock appear bumpy
    • A. 

      True

    • B. 

      False

  • 12. 
    Which type of rock is formed when marine organisms convert the calcium and carbonate ions dissolved in seawater into shells and other hard body parts?
    • A. 

      Carbonate

    • B. 

      Oolite

    • C. 

      Evaporate

    • D. 

      Clastic

  • 13. 
    An example of a carbonate sedimentary rock is
    • A. 

      Marble

    • B. 

      Pumice

    • C. 

      Granite

    • D. 

      Limestone

  • 14. 
    Lithification, the conversion of sediment to sedimentary rock, is a result of
    • A. 

      Evaporation and precipitation.

    • B. 

      Decomposition and compaction.

    • C. 

      Compaction and cementation.

    • D. 

      Weathering and erosion.

  • 15. 
    Fossils can be preserved with their original composition like bones or hair.
    • A. 

      True

    • B. 

      False

  • 16. 
    Which of the following is not a fossil?
    • A. 

      Petrified wood lying on the desert floor

    • B. 

      Fossilized fern leaves in coal

    • C. 

      The impression of dinosaur tracks in a rock

    • D. 

      The skeleton of your pet fish

  • 17. 
    The important difference in the clastic sedimentary rocks types -- conglomerate, sandstone, shale and siltstone -- is:
    • A. 

      Composition

    • B. 

      Cememt type

    • C. 

      Particle size

    • D. 

      Parent rock

  • 18. 
    Rocks made from sediment laid down by turbidity currents often show
    • A. 

      Graded bedding

    • B. 

      Ripple marks

    • C. 

      Mud cracks

    • D. 

      Dinosaur tracks

  • 19. 
    Which of the following is NOT sediment?
    • A. 

      Minerals consolidated into a rock.

    • B. 

      Solid particles of preexisting rocks yielded by mechanical and chemical weathering.

    • C. 

      Minerals extracted from seawater by organisms to build their shells.

    • D. 

      Minerals derived from solutions containing minerals dissolved during chemical weathering.

  • 20. 
    An example of a clastic sedimentary rock is
    • A. 

      Sandstone

    • B. 

      Mudstone

    • C. 

      Arkose

    • D. 

      All answers apply

  • 21. 
    The difference between the sediments gravel, sand, silt, and clay is
    • A. 

      Grain size.

    • B. 

      Roundness.

    • C. 

      Composition.

    • D. 

      Origin.

  • 22. 
    Fossils are commonly found in igneous and metamorphic rocks.
    • A. 

      True

    • B. 

      False

  • 23. 
    Clastic or detrital sediment larger than 2 millimeters across is
    • A. 

      Gravel.

    • B. 

      Sand.

    • C. 

      Clay.

    • D. 

      Silt.

  • 24. 
    Sediment and sedimentary rocks
    • A. 

      Don't make up as much volume in the crust as do igneous and metamorphic (crystalline) rocks but cover the majority of the surface of the continents.

    • B. 

      Make up about 95% of the Earth's crust by volume.

    • C. 

      Are never older than 10 to 12 million years because they are always weathered and "recycled" quickly in the rock cycle.

    • D. 

      Are interesting to scientists but don't contain ore deposits.

  • 25. 
    Evaporties are formed when chemicals precipitate to form cememt aorund sand-size particles.
    • A. 

      True

    • B. 

      False

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