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3.5 3.0- 2.5 1 mile 2.0- 1.5 1.0- A Figure 11 Stereogram of the Campti, Louisiana, area. (Courtesy of U.S. Geological Survey) 3. Using Figure 5C as a reference, identify the type of feature found at each of the following letters on the map in Figure 10: Letter C (Old River): Oxbow Labe Point, Ban Letter D: Letter E: Yazao tributaries. Letter F: Backswamp 4. If no contour lines cross the Red River and the contour interval is 20 feet, what is the maximum gradient of section of the Red River? (Note: Although the red lines that cross the river resemble contour lines, they are land boundaries established by the French, using the long-lot survey system.) Maximum gradient: 0.42 feet per mile 5. Identify and label examples of a point bar, a cutbank, and an oxbow lake on the stereogram in Figure 11.

3.5 3.0- 2.5 1 mile 2.0- 1.5 1.0- A Figure 11 Stereogram of the Campti, Louisiana, area. (Courtesy of U.S. Geological Survey) 3. Using Figure 5C as a reference, identify the type of feature found at each of the following letters on the map in Figure 10: Letter C (Old River): Oxbow Labe Point, Ban Letter D: Letter E: Yazao tributaries. Letter F: Backswamp 4. If no contour lines cross the Red River and the contour interval is 20 feet, what is the maximum gradient of section of the Red River? (Note: Although the red lines that cross the river resemble contour lines, they are land boundaries established by the French, using the long-lot survey system.) Maximum gradient: 0.42 feet per mile 5. Identify and label examples of a point bar, a cutbank, and an oxbow lake on the stereogram in Figure 11.

Applications and Investigations in Earth Science (9th Edition)
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
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5. Identify and label examples of a point bar, a cutbank, and an oxbow lake on the stereograham and figure 11.
### Understanding River Features: Analyzing a Stereogram of the Red River, Campti, Louisiana #### Figure 11: Stereogram of the Campti, Louisiana Area This figure presents two stereographic images of a section of the Red River in Campti, Louisiana. The images are from the U.S. Geological Survey. A stereogram helps visualize geographical features in three dimensions when viewed with a stereoscope. **Key Observations:** - The river exhibits multiple meanders, with notable features including oxbow lakes and cutbanks. - The left image displays a clearer oxbow lake at position "C." #### Tasks and Analysis **3. River Features Identification** Using Figure 5C as a reference, identify the features marked by specific letters on the map in Figure 10: - **Letter C (Old River):** Oxbow Lake - **Letter D:** Point Bar - **Letter E:** Yazoo Tributaries - **Letter F:** Backswamp **4. Gradient Calculation** To find the maximum gradient of the Red River given a contour interval of 20 feet: **Maximum Gradient:** 0.42 feet per mile **5. Identification of River Features in the Stereogram** Identify and label the following in the stereogram of Figure 11: - **Point Bar:** Sediments deposited on the inside bends of meanders. - **Cutbank:** The eroded outer bank on the outside of the meanders. - **Oxbow Lake:** A U-shaped water body formed from a meander cutoff from the main river channel. **6. Comparative Analysis Statement** Write a statement comparing the width of the meander belt of the Red River to the width of its floodplain: "The width of the meander belt, the zone in which the river freely migrates and creates meanders, is significantly smaller compared to the expanse of its floodplain, which is the broader area surrounding the river that floods during high discharge events." This detailed analysis enhances understanding of river dynamics and geomorphological features, crucial for geographic studies and environmental planning.
Transcribed Image Text:### Understanding River Features: Analyzing a Stereogram of the Red River, Campti, Louisiana #### Figure 11: Stereogram of the Campti, Louisiana Area This figure presents two stereographic images of a section of the Red River in Campti, Louisiana. The images are from the U.S. Geological Survey. A stereogram helps visualize geographical features in three dimensions when viewed with a stereoscope. **Key Observations:** - The river exhibits multiple meanders, with notable features including oxbow lakes and cutbanks. - The left image displays a clearer oxbow lake at position "C." #### Tasks and Analysis **3. River Features Identification** Using Figure 5C as a reference, identify the features marked by specific letters on the map in Figure 10: - **Letter C (Old River):** Oxbow Lake - **Letter D:** Point Bar - **Letter E:** Yazoo Tributaries - **Letter F:** Backswamp **4. Gradient Calculation** To find the maximum gradient of the Red River given a contour interval of 20 feet: **Maximum Gradient:** 0.42 feet per mile **5. Identification of River Features in the Stereogram** Identify and label the following in the stereogram of Figure 11: - **Point Bar:** Sediments deposited on the inside bends of meanders. - **Cutbank:** The eroded outer bank on the outside of the meanders. - **Oxbow Lake:** A U-shaped water body formed from a meander cutoff from the main river channel. **6. Comparative Analysis Statement** Write a statement comparing the width of the meander belt of the Red River to the width of its floodplain: "The width of the meander belt, the zone in which the river freely migrates and creates meanders, is significantly smaller compared to the expanse of its floodplain, which is the broader area surrounding the river that floods during high discharge events." This detailed analysis enhances understanding of river dynamics and geomorphological features, crucial for geographic studies and environmental planning.
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