Lab 11

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Cochise County Community College District *

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101

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Geography

Date

Dec 6, 2023

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docx

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7

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G101 Lab 11 How the Earth was Made: Grand Canyon This lab is largely in response to student feedback which calls on Human Geography to ‘ground’ the Physical Geography in relation to human experience. We will be looking at the Grand Canyon and how it was formed from a Physical Geography perspective and listening to a member of the Havasupai tribe speak of their historical and contemporary relationship to that place and what it means practically and cosmologically. For those you who may be science majors and may feel that this ‘lab’ is not aligned with a science course or who may feel even that it is inappropriate and a misuse of instructor authority to bring so much cultural consideration to a science course, I think that is a legitimate perspective. Luckily, I suspect that I am more concerned about that than any of you are. I want to explain that I am continually seeing people struggling for a way to situate themselves in an ever more globalized world where we are tasked with making choices that will inform the world long after we as individuals have passed. Lab 7 showed us how hard it can be to fit places into climate classifications, and that not everyone agrees on the classification criteria, let alone which places belong in which category or when those categories may be useful and when they may distort understandings of specific places at specific times. Much of this class has been learning new vocabulary and giving language to things that may make them seem static and isolated (boundaried, discrete), but in actuality, everything we have looked at is interrelated and part of continual interconnected dynamic processes. Humans are no different. We are one variable in these processes impacting and impacted by our interdependencies. Given that the economy is globalized, that natural processes are planetary, and that we are facing climate change as a global citizenry, we will need to be discerning with how we categorize and classify knowledges as they are experienced by ourselves and others. This lab will include viewing and responding to three separate pieces of media (two documentaries and six slides). There will be a total of about an hour and a half of viewing the media and answering a total of 18 questions related to the media. (You will likely have to review pieces of the media after the initial viewing to answer some questions. I suggest reading the questions before viewing the media.) Please watch “How the Earth was Made: Grand Canyon” at ( https://www.youtube.com/watch? v=LaxaE7tcwu4 ). Then answer the following questions according to the understandings of the geologists in the documentary. 1. How much water can flow down the 1,450-mile-long Colorado River every hour? (3:50) 2. What was John Wesley Powell known for? (4:40) 3. What is significant about the 1.7 billion year old Vishnu Schist? (5:50)
4. What did the calcium ratio in the garnets found in the Vishnu Schist tell geologists about the depth at which the Vishnu Schist formed? (7:30) 5. Approximately how many times has the area around the Grand Canyon been under an ocean after the original six-mile-high mountains there were eroded? (9:30) 6. The rock layers in the Grand Canyon are distinct, yet most of them are a red or yellowish color. Why? (10:30) What does that indicate about the structural integrity of the rock? 7. The Laramide Orogeny that caused the uplift of the Colorado Plateau was different than other mountain building events. How? (13:30) Now, please look over the next 6 slides and answer the questions below. You are welcome to view the links on the last slide but are not required to.
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