Objectives By completing this exercise you will be able to: Recognize stream eroded canyons from topographic profiles. Construct a long profile of a stream and relate slope to stream evolution. Relate changes in the width, length, slope gradient, and depth of a stream canyon to stream evolution Materials: U.S. Geological Survey topographic map of the Soda Canyon Quadrangle, Colorado, 1:62,500 and plastic raised relief model; pencil; color pencils; eraser; millimeter-scale ruler/straight edge. Valley Profiles You will find a vertical scale for constructing a topographic profile across the Mancos River (A- A') and Johnson Canyon (B-B') with map sections below. Each map section is zoomed to the same scale to make construction of a profile easy. Both profiles will constructed to the same scale. To construct your profile, use only index contours (the heavy contour lines). You can skip the other lines in plotting but remember they are still there and give us information about how the profile should look. Note: If you need a refresher on constructing profiles go back and watch the video tutorial again on the Canvas Virtual Lab Module page for this lab module. 450. Stream 500, 500. 550. Y Steps to constructing a topographic profile. Step 1: Identify every place a contour crosses the line of profile on the map. Step 2: Line up your vertical scale with the line of profile. Step 3: Transfer your elevation values from the line of profile to the vertical scale. Step 4 Complete the profile by connecting the points of elevation on the vertical scale with a single smooth continuous line. Make sure ends of your profile follow the slope to the of your graph. X 650 600 550 500 450 4001 Introductory Geology Laboratory Y 650 You have learned to construct 600 topographic profiles in an earlier 550 lab. If you need more help with 500 450 them you should stop and review 400 that lab before proceeding Stream Evolution 2

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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Transcribed Image Text:Objectives By completing this exercise you will be able to: Recognize stream eroded canyons from topographic profiles. Construct a long profile of a stream and relate slope to stream evolution. Relate changes in the width, length, slope gradient, and depth of a stream canyon to stream evolution Materials: U.S. Geological Survey topographic map of the Soda Canyon Quadrangle, Colorado, 1:62,500 and plastic raised relief model; pencil; color pencils; eraser; millimeter-scale ruler/straight edge. Valley Profiles You will find a vertical scale for constructing a topographic profile across the Mancos River (A- A') and Johnson Canyon (B-B') with map sections below. Each map section is zoomed to the same scale to make construction of a profile easy. Both profiles will constructed to the same scale. To construct your profile, use only index contours (the heavy contour lines). You can skip the other lines in plotting but remember they are still there and give us information about how the profile should look. Note: If you need a refresher on constructing profiles go back and watch the video tutorial again on the Canvas Virtual Lab Module page for this lab module. 450. Stream 500, 500. 550. Y Steps to constructing a topographic profile. Step 1: Identify every place a contour crosses the line of profile on the map. Step 2: Line up your vertical scale with the line of profile. Step 3: Transfer your elevation values from the line of profile to the vertical scale. Step 4 Complete the profile by connecting the points of elevation on the vertical scale with a single smooth continuous line. Make sure ends of your profile follow the slope to the of your graph. X 650 600 550 500 450 4001 Introductory Geology Laboratory Y 650 You have learned to construct 600 topographic profiles in an earlier 550 lab. If you need more help with 500 450 them you should stop and review 400 that lab before proceeding Stream Evolution 2

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