Forest physiography; physiography of the United States and principles of soils in relation to forestry . s of the main summits of the two ranges.* TREK GROWTH The Park Range is covered with large timber similar to that foundon the Colorado Range. The main types are pines above and aspensand small low trees along the lower or dry timber line. In the localalluvium-floored basins timber is wanting, as in Egeria Park and theparks along the Yampah, except for a fringe of cottonwoods borderingthe streams.^ SAWATCH RANGE The Sawatch Range extends for over So miles from the Mountain ofthe Holy Cross (
Forest physiography; physiography of the United States and principles of soils in relation to forestry . s of the main summits of the two ranges.* TREK GROWTH The Park Range is covered with large timber similar to that foundon the Colorado Range. The main types are pines above and aspensand small low trees along the lower or dry timber line. In the localalluvium-floored basins timber is wanting, as in Egeria Park and theparks along the Yampah, except for a fringe of cottonwoods borderingthe streams.^ SAWATCH RANGE The Sawatch Range extends for over So miles from the Mountain ofthe Holy Cross (lat. 39° 28) southward to the San Luis Valley. Forthis entire distance [it] literally bristles with lofty points about 10 ofwhich rise above 14,000 feet and many more are 13,000 feet above sea 1 Hayden Reports, 1873, pp. 178, 18S, 189, 436, 437. 2 Idem, pp. 65-66. 3 Idem, 1874, p. 71. * Arnold Hague, U. S. Geol. Expl. of the 40th Par. (King Surveys), vol. 2, 1877, pp. S. B. Ladd, U. S. Geol. and Geog. Surv. of Col. and Adj. Terr. (Hayden Surveys),1874. P- 441- ROCKY ? MOUNTAINS. Ill 371. Scale of Miles Fig. 125. • Extent of the former glacier systems in parts of the Park, (east) and the Sawatch (west)ranges of Colorado, Leadville quadrangle, (After Capps, U. S. Geol. Surv.) 372 FOREST PHYSIOGRAPHY level. It has a rather symmetrical outline, and its pointed summitsvary but little in either form or height.^ On the east is the valley of theupper Arkansas; on the west is the valley of the Gunnison. Like theneighboring ranges on the north and east it is a great anticlinal upliftwhose central axis is composed of crystalline rocks from which sedi-mentary formations dip away at various angles. This type of structureis, however, complicated on the southwestern flank of the range byvolcanic flows which wrap about the Sawatch crystallines, as theCachetopa Hills — a portion of the great igneous field of the San Juanregion. Because of this and other structural irregularities,
Size: 1401px × 1783px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
