BuyFind

Fundamentals of Physical Geography

2nd Edition
James Petersen
Publisher: CENGAGE L
ISBN: 9781133606536
BuyFind

Fundamentals of Physical Geography

2nd Edition
James Petersen
Publisher: CENGAGE L
ISBN: 9781133606536

Solutions

Chapter 12, Problem 1FQ
Textbook Problem

Chapter 12, Problem 1FQ, FIGURE 12.1 This boulder, which was once hard and solid, has undergone disintegration and

FIGURE 12.1 This boulder, which was once hard and solid, has undergone disintegration and decomposition due to conditions at Earth’s surface.

Why are some exposed parts of the boulder darker than others?

Expert Solution
To determine

The reason why some exposed parts of the boulder are darker than others.

Answer to Problem 1FQ

The darker areas may have undergone weathering and thereby generate new, darker compounds such as iron oxides, while the lighter areas are exposed to the surface more recently following the removal of weathered products.

Explanation of Solution

Weathering can be defined as the process that involves the breakdown of rock material into smaller particles at or near the surface of the Earth. The process of weathering takes place when a rock is exposed to an environmental condition that supports weathering. It can be a change in pressure, temperature, or substances mainly water. As a result of weathering, the rocks are weakened and broken. These broken particles are known as clasts, and it can be small or large. Continuous weathering that takes place on detached fragments breaks them into smaller particles, and thus they become susceptible to other exogenic processes such as erosion, transportation, and deposition.

Some of the exposed parts of boulders are darker than others due to the fact that the areas have undergone weathering, and new, darker compounds such as iron oxides are formed. The lighter areas are the parts of boulders that are exposed to the surface recently after the removal of weathered products.

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Chapter 12 Solutions

Fundamentals of Physical Geography
Ch. 12 - FIGURE 12.19 Multiple cross-cutting joint sets are...Ch. 12 - Can you see how the topography of the Ridge and...Ch. 12 - FIGURE 12.23 (a) In 2012 this massive boulder...Ch. 12 - How might vegetative cover or moisture content...Ch. 12 - What other constructed features might be damaged...Ch. 12 - FIGURE 12.27 Solifluction has formed these...Ch. 12 - FIGURE 12.28 Eventually this overhanging sandstone...Ch. 12 - How would the angle of repose of rounded particles...Ch. 12 - FIGURE 12.31 (a) A small snow avalanche in the...Ch. 12 - FIGURE 12.33 Results of a mudslide in California....Ch. 12 - FIGURE 12.34 Slump is the common name for a...Ch. 12 - FIGURE 12.36 This small debris flow in western...Ch. 12 - FIGURE 12.37 A 1995 debris flow in La Conchita,...Ch. 12 - How is weathering important to the processes of...Ch. 12 - In what ways is mass wasting similar to, yet...Ch. 12 - What are four processes involving expansion and...Ch. 12 - Distinguish between hydration and hydrolysis.Ch. 12 - Why is there more chemical weathering overall in...Ch. 12 - How are joints, fractures, and other voids in a...Ch. 12 - What are the distinguishing characteristics of...Ch. 12 - What is soil creep and what factors facilitate it?Ch. 12 - Describe the principal differences between (a) a...Ch. 12 - What are some ways by which mass wasting hazards...Ch. 12 - If you were an urban planner in a large industrial...Ch. 12 - A mass of wet sediment, including numerous large...Ch. 12 - Using Google Earth, identify the principal type of...

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