Lab 5_ Weathering
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Georgia State University *
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Course
1113L
Subject
Geography
Date
Apr 3, 2024
Type
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4
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Lab 5: Weathering
GEOG 1113L – Introduction to Landforms Lab Name: _Michael
Silva_
I. What is Weathering?
1.
What does weathering create/provide and what would Earth’s surface be composed of if
weathering did not happen?
It creates the inorganic material in the soil. If it didn’t happen, earth’s surface would be
composed of bedrock.
2.
What is the difference between weathering and erosion?
Weathering preps the rock materials to be moved and erosion is when the rock actually
moves.
3.
Describe the process of frost wedging (frost action).
Water gets absorbed into the pores of a rock and then once the water freezes the rock
expands and the stress builds up causing the rock to break.
4.
Similar to frost wedging, _salt crystal growth_ fractures rocks through crystal growth
within the pores of the rock. These crystals originate from _minerals_ inside the rock that
later evaporates and leaves behind _mineral grains_.
5.
The two previously mentioned types of weathering are both forms of what?
Granular Disintegration
6.
Which type of weathering causes metal to rust? Oxidation
7.
Weathering that alters minerals in a rock via water, oxygen, carbon, and/or other organic
acids is called what? Chemical Weathering
8.
Which type of weathering causes karst topography? Chemical Weathering
9.
Name three features you might find in a karst landscape.
Dry valleys, sinkholes, and caves
10. What is one fact (from the video) about caves that you find interesting?
That caves have their own ecosystems
11. Tree roots, lichen, and humans all play a part in weathering as well. Which type of
weathering is this called? Biological
II. Weathering Resistance
Use the two images below to answer questions about weathering resistance. Assume all rock
layers in both images have been subjected to the same type/amount of weathering.
Image A:
1.
Which color/pattern represents a rock layer that is MOST resistant to weathering
compared to the others? Dark Grey layer
2.
Which color/pattern represents a rock layer that is LEAST resistant to weathering
compared to the others? Black layer
3.
Which colors/patterns represent rock layers that share the same level of resistance to
weathering compared to the others? White layer with lines
Image B:
4.
Within the red box, which layer appears to be most resistant to weathering (A, B, or C)?
B
5.
Within the red box, which layer appears to be the least resistant to weathering? A
6.
What is one indication that a rock layer is more resistant to weathering?
Surface
Exposure
III. Physical Vs. Chemical Weathering
For each location below, be sure to explore the photo by dragging your mouse around the 360
o
view around you and using the scroll feature on your mouse to zoom in and out on specific parts
of the image. Answer each question that accompanies the link.
1. Visit
Apikuni Falls
in Glacier National Park. Some of these rocks have a white color, but they
have an orange color where they are exposed to water from the waterfall. Which type of
weathering is producing the orange-colored rocks?
●
Carbonation
●
Oxidation
●
Exfoliation
●
Frost wedging
2. Visit
Stone Foundation
in Wisconsin. There is evidence in this 360
O
photo for which type of
weathering?
●
Salt crystal growth
●
Oxidation
●
Exfoliation
●
Frost wedging
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