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.

5. Identify and label examples of a point bar, a cutbank, and an oxbow lake on the stereograham and figure 11.