Name Section EXERCISE 32 PROBLEMS-PART II The following questions are based on a
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Name Section EXERCISE 32 PROBLEMS-PART II The following questions are based on and Figure 32-3, a black-and-w color Map s T-20a and T-20b (in the onlands National Park, Utah. A larger portion of this region is back of the Lab Manual) hite stereogram, showing the entrenched meanders of the Green T-7 in the back of the Lab Manual. 1. In the aerial imagery (Map T-20b), notice that the dry gorge around the half-circle-shaped hill looks like a ridge surrounding a depression. Why does it appear this way Describe one kind of detail on the surface of the cliffs along the Green River that is visible in the aerial photographs, but not on the topographic map. 2. 3. How can different layers of rock be discerned from the aerial photographs? Does all of the vegetation along the river course appear to be the same as that shown along the narrow wash extending to the southwest through Horseshoe Can- yon? 4. Look at the vegetation shown as green in the color aerial photograph (Map T-20b). (a) (b) Explain. river in the southeastern part of the aerial photograph. In what kinds of topogaphic fa- tures might this vegetation be growing? 5. Look for faint, slightly sinuous lines of discontinuous vegetation on the plateau above theExplanation / Answer
1. The rocks in the gorge are incompetent which makes them easier to erode. Since the hills are in half circle shape and the view is taken from the top which makes the hills to appear flatter like a ridge surrounding a depression which is a gorge.
2. In the map the countours values are shown clearly whereas in the topographic map only the visible topography of the area are shown with colour and elevation difference shown with ruggedness or smoothness of the terrain.
3. The different layers of the rock in the aerial photographed can be identified by the change in colour, tone or roughness or smoothness of the terrain.
4.a. The vegetation along the river course is not same throughout extending from southwest through Horseshoe canyon. The vegetation appears from lighter shades to darker shades of green.
b. There is variation in vegetation colour as seen in the image because the darker shades of green indicates that the vegetation is growing actively whereas the lighter shades indicates that the vegetation growth is not active in the area.
5. As seen in the photograph the vegetation is growing on the hilly topography.
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