Desert Landforms Name Section PROBLEMS-PART II The following questions are based
ID: 295120 • Letter: D
Question
Desert Landforms Name Section PROBLEMS-PART II The following questions are based on Figure 3, a portion of the "Antelope Peak, Arizona" quad- rangle (scale 1:62,500; contour interval 25 feet). In the northern portion of the map, a gently sloping pediment is visible (32°47'52"N, 112 05 21"W). You may view this map in color by going to the Lab Manual website or by scanning the QR code for this exercise. 1. What evidence from the map suggests that the pediment is covered with a mantle of alluvium? 2. (a What kind of landform is illustrated by the cluster of small hills in the northern portion of the map? (b) Explain their development. 3. (a) Describe the location of one clearly defined alluvial fan on the map (b) Which landform-the pediment or the alluvial fan-has a steeper slope? 237Explanation / Answer
1. The excavation of Ventana cave showed the stratigrapgic evidence of the mantle of alluvium covers the mountain pediments and become thicker towards the valley floor.
2. a. The canyon landform is found in the northern portion of the map.
b. Erosion has resulted into the formation of Canyon. When the Colorado River carved out the great grand Canyon by the taking the land down the river with it, left was the river valley with steep cliffs.
3. a. Vekol Wash alluvial fan is found in the northern corner of the Antelope peak of Arizona.
b. Alluvial fans has a steeper slope.