Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER VIII MOUNTAINS AND PLATEAUS 163-164. Profile of Kocky Mountains in Colorado (Fig. 123).—We horizontal scale, same as in figure; vertical scale J inch = 5,000 feet. Represent sea level by a base-line 4 inches long. Make first profile east and west by Colorado Springs. Locate along the base-line Colorado Springs at the east base of the mountains, Pike's Peak summit, middle of South Park, crest of Mosquito Range, Arkansas River, crest of Sawatch Range, and two or three minor crests along the line to the westward. Colorado Springs is 6,000 feet above the sea, and the plain slopes eastward gently. Pike's Peak has an altitude of about 14,000; South Park and Arkansas Valley, 8,000 to 9,000; the Sawatch Range about 14,000, and Mosquito Range about 11,000. The vertical can be erected in accordance with these figures and the profile drawn. Make a similar profile from east to west along the line of the word " park" in San Luis Park and compare it with the first, noting differences. Compare your profiles with the geological section of the Front Range (Fig. 125). Where does this section belong, if its line were drawn on the map (Fig. 123) ? In learning the structure of these mountain ranges from the text and from Fig. 125, consult also Gannett's Physiographic Types, folio ii, Hogbacks. His map, view, section, and text explain quite fully " Rocky Mountain structure." 165. Colorado Plateaus.—Echo Cliffs Sheet and Kaibab Sheet. If the group of sheets noted in the Teacher's Guide is available, the study can be made to cover the entire region. Review exercise 27a. Note scale and contour interval. What is the altitude of Paria Plateau? The direction of slope? Height of Vermilion Cliffs? For a general view of such cliffs see Fig. 126. Altitude of plateau south of Vermilion Clif...