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20 True/False questions

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


  2. How do icebergs in the North Atlantic Ocean originate?Melting at the base of the glacier resulting in increased rates of basal slip


  3. Which process occurs where a glacier enters the sea?by calving of large piedmont glaciers in Greenland


  4. Abrasion and plucking generally involve what part of a glacier?Basal slip


  5. A(n) ________ is likely to host a waterfall or steep rapids today.kettle


  6. Approximately how long ago did the last of the great North American ice sheets melt?by calving of large piedmont glaciers in Greenland


  7. A fiord is ________.a stream valley, deepened by glacial erosion, that floods as sea level rises


  8. Which of the following glacial features would typically be found in close proximity?hanging valley and truncated spur


  9. The ________ of the geologic time scale represents the time of the most recent "Ice Age."Pleistocene epoch


  10. ________ is one of the two major flow mechanisms in a glacier.Melting at the base of the glacier resulting in increased rates of basal slip


  11. ________ is the best explanation for a glacial surge.Basal slip


  12. A ________ is an erosional feature specifically produced by alpine glaciation.Cirques


  13. What type of moraine is formed by the merging of two lateral moraines at a junction of two valley glaciers?lateral, valley or alpine glacier


  14. Which of the following is often associated with a cirque basin in high, mountainous terrain?hanging valley and truncated spur


  15. Which one of the following applies to a valley glacier that lengthens (extends its terminus downslope) over a period of many years?Accumulation exceeds wastage.


  16. Where is the world's largest ice sheet located today?calving


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


  18. ________ are erosional features produced by valley/alpine glaciers.U-shaped valley


  19. A ________ forms when stagnant, glacial ice melts after being buried by drift.kettle


  20. What type of moraine would be most useful for tracing diamond-bearing kimberlite fragments directly to their bedrock source area?lateral, valley or alpine glacier