Distribution of mammals in Colorado Distribution of mammals in Colorado distributionofma31972arms Year: 1972 20 MONOGRAPH MUSEUM OF NATURAL HISTORY NO. 3 Fig. 5. Map of Colorado and parts of adjacent states showing principal hydrographic features; numbers apply to major watersheds, identified in text. Irregular north-south line in Colorado is the Continental Divide. (Modified from map, 'United States of America showing extent of public land surveys. . . ,' 1:2,500,000, Geological Survey and Bureau of Land Management, 1965.) corridor). Streamside vegetation may be in- appropriate as c
Distribution of mammals in Colorado Distribution of mammals in Colorado distributionofma31972arms Year: 1972 20 MONOGRAPH MUSEUM OF NATURAL HISTORY NO. 3 Fig. 5. Map of Colorado and parts of adjacent states showing principal hydrographic features; numbers apply to major watersheds, identified in text. Irregular north-south line in Colorado is the Continental Divide. (Modified from map, 'United States of America showing extent of public land surveys. . . ,' 1:2,500,000, Geological Survey and Bureau of Land Management, 1965.) corridor). Streamside vegetation may be in- appropriate as cover or food supply for a given species. Disruption of vegetation by canyons or floodplains may create an im- passable barrier of long-term significance. Major drainage features of Colorado and adjacent areas are indicated in figure 5, and are identified by number in the following text. Four major streams of the western United States head in the mountains of Colo- rado—the Rio Grande, Arkansas, Platte, and Colorado. The Rio Grande (1) rises in the San Juan Mountains southeast of Silverton, and flows eastward in a broad trough to the San Luis Valley. Turning southward at Ala- mosa, it flows into New Mexico, having lost much of its flow to the artesian basin sus- pended beneath the San Luis Valley. Major tributaries in Colorado are Culebra Creek and the Conejos River. The northern part of the San Luis Valley is an internal drainage basin (2), receiving the waters of Saguache, Cres- stone, and Medano creeks. The Arkansas River (3) heads in the Sa- watch Range above Leadville. The Upper Arkansas flows through a generally narrow
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