Lab 5 Assignment complete

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Georgia State University *

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113

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Geography

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Apr 3, 2024

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docx

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Lab 5: Weathering GEOG 1113L – Introduction to Landforms Lab Name: ____Jack Davis_________ 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 provides nonorganic materials in the soil where the vegetation needs it in order to grow. If weathering did not occur then it would be solid bedrock. 2. What is the difference between weathering and erosion? Erosion is the rock actually moving while weathering just prepares the rock materials to be moved 3. Describe the process of frost wedging (frost action). The rock breaks due to stress from water freezing inside the pores of the rock which make it expand until its ready 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 that have dissolved through water___ 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 disintegrationn 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? The carbonation weakening the limestone 9. Name three features you might find in a karst landscape. Sink holes caves and dry valley 10. What is one fact (from the video) about caves that you find interesting? I find it pretty cool that caves are their own entire ecosystsems where unique life grows out of. 11. Tree roots, lichen, and humans all play a part in weathering as well. Which type of weathering is this called? Biological weathering
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 with the black dashes layers
Image B: 4. Within the red box, which layer appears to be most resistant to weathering (A, B, or C)? A 5. Within the red box, which layer appears to be the least resistant to weathering? B 6. What is one indication that a rock layer is more resistant to weathering? Depending on how much of the surface is exposed to water, heat, wind 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? a. Carbonation b. Oxidation
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