Exploring Geology
5th Edition
ISBN: 9781259929632
Author: Reynolds, Stephen J., Johnson, Julia K., Morin, Paul J.
Publisher: Mcgraw-hill Education,
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Question
Chapter 11.1, Problem 1BYL
To determine
The summary regarding the factors that control regional elevation.
Expert Solution & Answer
Answer to Problem 1BYL
The factors that control regional elevations are the thickness of the crust, temperature of the material, and density of the material.
Explanation of Solution
The primary factor controlling regional elevations are the crustal thickness, although it is also influenced by the temperature and density of materials in the crust and upper mantle.
Areas with a thicker crust are higher when compared to those with a thinner crust. For instance, mountain ranges or orogeny belts contain deep crustal roots. Areas underlain by less dense crust are higher in elevation than areas by more dense crust with a similar thickness.
Elevation is also affected by the temperature of the mantle and crust. Cooler rocks are denser than warmer rocks. Hence, areas containing warm rocks are higher in elevation than those containing cooler rocks.
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Ap
Retreating
glacier
Bedrock
Till
Stratified
drift
▲ Figure 9.7 This diagram showing common depositional landforms depicts a hypothetical area affected by ice
sheets in the recent geologic past. (Drumlin photo courtesy of Ward's Natural Science Establishment; esker photo by Richard P. Jacobs/
JLM Visuals; kame photo by John Dankwardt; kettle lake photo by Carlyn Iverson/Science Source)
Figure 9.9 is a stereogram showing a portion of the area covered by the Whitewater, Wisconsin, topographic map (Figure 9.10, page 160). Use the stereogram and the map to complete the following.
7. The streamlined, asymmetrical hills composed of till, labeled B, are what type of feature?
8. Examine the shape of the features labeled B on the map in Figure 9.10. How can these features be used to determine the direction of ice flow in a glaciated area?
9. Using the features labeled B in Figure 9.10 as a guide, draw an arrow on the map to indicate the direction of ice movement that occurred in this region.
10. What is the likely location of the outwash plain on the map? Identify and label the area "outwash plain." (Hint: Refer to Figure 9.7.)
11. Label the area covered by ground moraine.
12. What term is applied to the numerous almost circular depressions designated with the letter C?
Chapter 11 Solutions
Exploring Geology
Ch. 11.1 - Prob. 1BYLCh. 11.1 - Prob. 2BYLCh. 11.1 - Prob. 3BYLCh. 11.1 - Prob. 4BYLCh. 11.2 - Prob. 1BYLCh. 11.2 - Prob. 2BYLCh. 11.2 - Prob. 3BYLCh. 11.2 - Prob. 4BYLCh. 11.3 - Prob. 1BYLCh. 11.3 - Prob. 2BYL
Ch. 11.3 - Prob. 3BYLCh. 11.4 - Prob. 1BYLCh. 11.4 - Prob. 2BYLCh. 11.4 - Prob. 3BYLCh. 11.5 - Prob. 1BYLCh. 11.5 - Prob. 2BYLCh. 11.5 - Prob. 3BYLCh. 11.5 - Prob. 4BYLCh. 11.6 - Prob. 1BYLCh. 11.6 - Prob. 2BYLCh. 11.6 - Prob. 3BYLCh. 11.7 - Prob. 1BYLCh. 11.7 - Prob. 2BYLCh. 11.7 - Prob. 3BYLCh. 11.8 - Prob. 1BYLCh. 11.8 - Prob. 2BYLCh. 11.8 - Prob. 3BYLCh. 11.9 - Prob. 1BYLCh. 11.9 - Prob. 2BYLCh. 11.9 - Prob. 3BYLCh. 11.10 - Prob. 1BYLCh. 11.10 - Prob. 2BYLCh. 11.10 - Prob. 3BYLCh. 11.11 - Prob. 1BYLCh. 11.11 - Prob. 2BYLCh. 11.12 - Prob. 1BYLCh. 11.12 - Prob. 2BYLCh. 11.12 - Prob. 3BYLCh. 11.13 - Prob. 1BYL
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