Unit 3 Sculpting Earth's Topography_ Lab Practical on Soil Formation (2

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Arizona State University, Tempe *

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111

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Geography

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Apr 3, 2024

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pdf

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2/24/24, 7:22 PM Unit 3 Sculpting Earth's Topography: Lab Practical on Soil Formation (2.5 points): GPH 111: Intro to Physical Geography (202… https://canvas.asu.edu/courses/172892/quizzes/1298455 1/3 Unit 3 Sculpting Earth's Topography: Lab Practical on Soil Formation (2.5 points) Due No due date Points 2.5 Questions 5 Time Limit None Instructions Attempt History Attempt Time Score LATEST Attempt 1 8 minutes 1 out of 2.5 Score for this quiz: 1 out of 2.5 Submitted Feb 24 at 7:22pm This attempt took 8 minutes.  Question 1 0 / 0.5 pts You Answered podzolization Correct Answer laterization calcification salinization This image shows a soil pro±ile produced by laterization. The signature appearance of such a soil pro±ile is a reddish color throughout almost the entire depth of the soil pro±ile. This reddish color is from iron oxides that are concentrated over time. The abundant water moving downward This lab practical tasks you with identifying the soil-forming (pedogenic) process that generated a soil profile. You will be shown pictures of soil profiles, and you are tasked with analyzing the soil-forming processes that led to that profile. Some of the pictures require our class logon (gph111) and password (gaia) You should have watched the soils lecture. You can also obtain the same information from online readings Choice 1: 111PedogenesisRitter.pdf (https://canvas.asu.edu/courses/172892/files/77690431/download?wrap=1) Choice 2: http://www.physicalgeography.net/fundamentals/10u.html (http://www.physicalgeography.net/fundamentals/10u.html) ( archive (https://canvas.asu.edu/courses/172892/files/77690530/download?wrap=1) ) The potential processes are: Laterization associated with a tropical rainforest environment. Podzolization associated with a coniferous forest. Calcification associated with semi-arid or desert vegetation. Salinization associated with saline groundwater closed to the surface. Gleization associated with a bog environment. What soil-forming (pedogenic) process generated this soil profile (https://www.asu.edu/courses/gph111/labs/lp_soils/11.jpg) .

2/24/24, 7:22 PM Unit 3 Sculpting Earth's Topography: Lab Practical on Soil Formation (2.5 points): GPH 111: Intro to Physical Geography (202… https://canvas.asu.edu/courses/172892/quizzes/1298455 2/3 through the soil leaches material other than iron (and aluminum oxides). Thus, what remains (iron and aluminum oxides) are concentrated over time, and the iron oxide turn the entire soil pro±ile a reddish color.  Question 2 0 / 0.5 pts podzolization Correct Answer gleization You Answered laterization calcification This Google Street view could only have been produced by gleization. Gleization requires waterlogging. The extremely wet conditions and low- lying terrain allowed bogs to form. The organic matter only partially decayed in these bogs, leading to the formation of peat.  Question 3 0.5 / 0.5 pts calcification podzolization gleization Correct! laterization This Google Street view could only have been produced by laterization. The laterization soil-forming regime leaches almost everything out of the soil except for the iron and aluminum oxidies. It is the iron oxides that give the reddish coloration. The reason why vegetation is able to grow, despite nutrients being leached out, is that the trees roots are outstanding at recycling the nutrients.  Question 4 0.5 / 0.5 pts laterization podzolization gleization Correct! calcification This image shows a soil pro±ile produced by calci±ication. The signature appearance of such a soil pro±ile is a white layer that is dominated by calcium carbonate deposition. If the climate is semi-arid, there will be a brown A horizon that has some organic matter and the carbonate will be lower down in the soil; this is because more rainwater leaches the carbonate to a greater depth. If the climate is arid, this brown A horizon will be lacking and the carbonate will be closer to the surface.  Question 5 0 / 0.5 pts laterization Correct Answer podzolization This is a Google Street view (https://www.google.com/maps/@53.4011764,-7.2507803,3a,75y,52.93h,57.28t/data=!3m6!1e1!3m4!1sTC0jYF99ZEVWFb75rlnnpg!2e0!7i13312!8i6656) of a dirt road in Ireland. The hint is that this location used to be a peat bog. Please zoom in and look carefully at the soil. You might be able to see that it is composed of the partially decayed remains of plants. What soil-forming regime generated this type of soil (called a histosol)? This is a Google Street view (https://www.google.com/maps/@3.9428413,11.5892605,3a,75y,195.1h,73.88t/data=!3m8!1e1!3m6!1s- qzOVl_Qyehw%2FVwo_F0Nf3eI%2FAAAAAAAAAJ4%2Fr2oextZByms6xtS1hp0p1-8vl6SKae_- A!2e4!3e11!6s%2F%2Flh4.googleusercontent.com%2F-qzOVl_Qyehw%2FVwo_F0Nf3eI%2FAAAAAAAAAJ4%2Fr2oextZByms6xtS1hp0p1- 8vl6SKae_-A%2Fw203-h101-n-k-no%2F!7i8192!8i4096) of a dirt road in Cameroon. I am hoping that the reddish color of all of the soil will make the question easier. What soil forming process generated all of the reddish soil that you see as you spin around the view? What soil-forming (pedogenic) process generated this soil profile (https://www.asu.edu/courses/gph111/labs/lp_soils/15.jpg) . What soil-forming (pedogenic) process generated this soil profile (https://www.asu.edu/courses/gph111/labs/lp_soils/1.jpg) .

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