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Author Question: Glaciers are powerful agents of erosion and deposition, and during the Quaternary Ice Age, these ... (Read 32 times)

stock

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on: Jul 14, 2018
Glaciers are powerful agents of erosion and deposition, and during the Quaternary Ice Age, these flowing masses of ice reshaped much of the North American continent.
 
  Discuss three of the effects of Ice Age glaciers that are not related to erosion or deposition.
  What will be an ideal response?

Question 2

Match the landscape feature with the material from which it is formed. Answers will be used more than once.
 
  A) outwash
  B) solid rock
 
  13) glacial erratic
  14) cirque
  15) esker
  16) horn
  17) drumlin
  18) moraine


wshriver

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Reply #1 on: Jul 14, 2018
Answer to Question 1

Answer: In addition to erosional and depositional features, other effects of Ice Age glaciers include the forced migration of organisms and adjustments of the crust by rebounding upward after removal of the immense load of ice. Advance and retreat of ice sheets caused significant changes to the paths followed by rivers. Proglacial lakes formed when glaciers acted as dams to create lakes by trapping glacial meltwater or blocking rivers. In response to the cooler and wetter glacial climate, pluvial lakes formed in areas such as present-day Nevada. Ice sheets are nourished by water that ultimately comes from the ocean, so when ice sheets grow, sea level falls, and when they melt, sea level rises. Lower sea levels during the Ice Age meant that now-isolated landmasses were connected, allowing the migration of people and other animals between islands and continents.

Answer to Question 2

Answers: 13) B 14) B 15) A 16) B 17) B 18) B


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