Gly Test 3 Practice Ch 18

48 Questions | Total Attempts: 46

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Gly Test Quizzes & Trivia

Questions and Answers
  • 1. 
    The ________ is not the name of a Pleistocene glacial episode in North America.
    • A. 

      Dakotan

    • B. 

      Kansan

    • C. 

      Illinoian

    • D. 

      Nebraskan

  • 2. 
    The ________ was the most recent Pleistocene glacial episode in North America.
    • A. 

      Dakotan

    • B. 

      Kansan

    • C. 

      Indianan

    • D. 

      Wisconsinan

  • 3. 
    ________ is one of the two major flow mechanisms in a glacier.
    • A. 

      Basal slip

    • B. 

      Crevassal slip

    • C. 

      Frost heaving

    • D. 

      Morainal sliding

  • 4. 
    Where is the world's largest ice sheet located today?
    • A. 

      Greenland

    • B. 

      Russia, Siberia

    • C. 

      Iceland

    • D. 

      Antarctica

  • 5. 
    Approximately how long ago did the last of the great North American ice sheets melt?
    • A. 

      1500 yrs

    • B. 

      1.5 million yrs

    • C. 

      15,000 yrs

    • D. 

      150,000 yrs

  • 6. 
    ________ has/have speeds comparable to those of a flowing alpine glacier.
    • A. 

      Soil creep

    • B. 

      Streams

    • C. 

      Mudflows

    • D. 

      Basaltic lava flows

  • 7. 
    The bottom or downward tip of a crevasse marks the ________.
    • A. 

      Boundary between parts of the glacier moving by basal sliding and crevassal slip

    • B. 

      Boundary between the basal sliding and external flowage zones

    • C. 

      Bottom of the basal sliding zone

    • D. 

      Top of the internal deformation and flowage zone

  • 8. 
    Which one of the following applies to a valley glacier that lengthens (extends its terminus downslope) over a period of many years?
    • A. 

      Wastage exceeds accumulation.

    • B. 

      Accumulation exceeds wastage.

    • C. 

      Accumulation and wastage are about equal.

    • D. 

      None of the above

  • 9. 
    Abrasion and plucking generally involve what part of a glacier?
    • A. 

      The internal, flowage zone

    • B. 

      The snout zone

    • C. 

      The surface, brittle zone

    • D. 

      The basal, sliding zone

  • 10. 
    A ________ cross-valley profile is typical of canyons and valleys eroded and deepened by alpine or valley glaciers.
    • A. 

      U

    • B. 

      Y

    • C. 

      V

    • D. 

      S

  • 11. 
    ________ are erosional features produced by valley/alpine glaciers.
    • A. 

      Moraines

    • B. 

      Cirques

    • C. 

      Eskers

    • D. 

      Drumlins

  • 12. 
    A(n) ________ is a depositional feature composed of till and only associated with continental glaciation, not with alpine glaciers.
    • A. 

      Till

    • B. 

      Outwash

    • C. 

      Solid rock

    • D. 

      Outwash deposit

  • 13. 
    Which of the following glacial features would typically be found in close proximity?
    • A. 

      Cirque and terminal moraine

    • B. 

      Outwash plain and horn

    • C. 

      Hanging valley and truncated spur

    • D. 

      Drumlin and fiord

  • 14. 
    A(n) ________ represents a former meltwater channel or tunnel in glacial ice that was filled
    • A. 

      Esker

    • B. 

      Yazoo ridge

    • C. 

      Valley plain

    • D. 

      Kettle

  • 15. 
    What type of moraine would be most useful for tracing diamond-bearing kimberlite fragments directly to their bedrock source area?
    • A. 

      Terminal, valley or alpine glacier

    • B. 

      Terminal, continental ice sheet

    • C. 

      Recessional, continental ice sheet

    • D. 

      Lateral, valley or alpine glacier

  • 16. 
    Which one of the following samples and experimental measurements would provide the most information about the Earth's climate over the last 100,000 years or so?
    • A. 

      Cores from sea ice in the Arctic Ocean; NaCl content

    • B. 

      Sediment cores from a terminal moraine in Ohio; sand-to-clay ratio

    • C. 

      Sediment cores from a Pleistocene loess deposit in the state of Mississippi; SiO2 content

    • D. 

      Cores from the Greenland ice sheet; ratios of the oxygen isotopes (0-18/0-16)

  • 17. 
    ________ is the best explanation for a glacial surge.
    • A. 

      The climate cools suddenly and a retreating glacier begins to advance

    • B. 

      Heavy snowfalls resulting in avalanches in the zone of accumulation

    • C. 

      Melting at the base of the glacier resulting in increased rates of basal slip

    • D. 

      Crevasses opening suddenly near the snout of a glacier

  • 18. 
    All of the following descriptions apply to stratified drift (not glacial till) except for ________.
    • A. 

      Deposited directly from melting ice

    • B. 

      Sand and gravel beds

    • C. 

      Deposits are often layered and well-sorted

    • D. 

      Deposited by glacial meltwater streams

  • 19. 
    A(n) ________ is similar in appearance to a sinkhole of a karst area.
    • A. 

      Moraine

    • B. 

      Esker

    • C. 

      Cirque

    • D. 

      Kettle

  • 20. 
    Which one of the following prominent landforms, located from the Wasatch Range, UT, westward to the Sierra Nevada, CA, formed during the Pleistocene glacial episodes?
    • A. 

      Terminal moraines of continental ice sheets that moved south from Canada

    • B. 

      Old shorelines of large, pluvial lakes

    • C. 

      Erosional features produced by continental glaciation

    • D. 

      Subaerial deltas submerged by the post-glacial rise in sea level

  • 21. 
    A fiord is ________.
    • A. 

      A stream valley, deepened by glacial erosion, that floods as sea level rises

    • B. 

      A glacier-cut valley that is dammed by an end moraine and a large lake is formed

    • C. 

      A glacier-cut valley which sinks below sea level due to glacial rebound after the ice melts

    • D. 

      A large, kettle-pocked moraine left as an island when sea level rises following melting of the ice

  • 22. 
    Which process occurs where a glacier enters the sea?
    • A. 

      Kaming

    • B. 

      Calving

    • C. 

      Surging

    • D. 

      Drowning

  • 23. 
    The ________ of the geologic time scale represents the time of the most recent "Ice Age."
    • A. 

      Pleistocene era

    • B. 

      Pliocene epoch

    • C. 

      Pleistocene epoch

    • D. 

      Pliocene era

  • 24. 
    Which of the following is the correct listing of the North American glacial stages from older to younger?
    • A. 

      Indianan, Kansan, Nebraskan, Ohioan

    • B. 

      Kansan, Illinoian, Iowan, Dakotan

    • C. 

      Nebraskan, Indianan, Illinoian, Wisconsinan

    • D. 

      Nebraskan, Kansan, Illinoian, Wisconsinan

  • 25. 
    Which one of the following statements concerning glaciers is not true?
    • A. 

      Ice sheets are larger than ice caps.

    • B. 

      Piedmont glaciers form on lowlands at the base of mountainous terrain.

    • C. 

      The volume of water tied up in the Antarctic ice sheet is about the same as the total discharge of the Amazon River in one year.

    • D. 

      Long, extended, alpine glaciers occupied valleys in most high, mountainous areas in the United States, Canada, and Europe at one or more times during the past two million years.

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