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<br /> <br />I <br /> <br />" <br /> <br />~jl <br /> <br />I <br /> <br />Geologic erosion is conspicuous along rocky canyons and shale slopes. <br />Severe accelerated water erosion is principally confined to stream <br />bank cutting and deep gullying in narrow valleys and swales. Portions <br />of this unit are ....ithin "Frail Watershed Lands" !:I that have been <br />described and inventoried by the Bureau of Land Management. <br /> <br />I <br /> <br />I <br /> <br />Soil Mapping Unit 3: Shallow rocky and deep moderately dark colored <br />soils of the uplands. <br /> <br />I <br /> <br />This is the largest unit in the Basin. <br />or slightly more than 34 percent of the <br />broad belt lying between the deserts and <br />Evacuation, Cottonwood, Douglas, Spring, <br /> <br />It extends over 839,000 acres <br />Basin. Much of it covers a <br />unit 5. Major creeks are: <br />Yellow and Piceance. <br /> <br />I <br /> <br />I <br /> <br />- <br /> <br />.~ <br /> <br />, <br /> <br />" <br />, <br /> <br />~ <br /> <br />- <br /> <br />- <br /> <br />.r.." <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br /> <br />" ~ <br /> <br />" <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />, <br /> <br />.. <br /> <br />:;?- <br /> <br />--,.A.e <br />- ~_. ~. <br />..~- .... <br />- <br />.,.~. <br /> <br />, - <br /> <br />I <br /> <br />-, <br /> <br />I <br /> <br />,-.,. <br />"~ <br /> <br />~ <br /> <br />- -- <br /> <br />- <br /> <br />- <br /> <br />I <br /> <br />Spring grazing <br />(Soil Mapping Unit 3) <br /> <br />I <br /> <br />The landscape is highly dissected by creeks and their intermittent <br />tributaries. There is a repeating pattern of narro~ alluvial valleys <br />along creeks flanked by canyons or very steep rocky slopes which rise <br />to higher lying uplands. Narro~ bands of rolling upland or mesas <br />form divides between upper reaches of creek tributaries. <br /> <br />I <br /> <br />I <br /> <br />!! Jensen, Cyril L. "A Preliminary Study and Report on Frail Watershed <br />Lands". U. S. Department of the Interior, 1964. <br /> <br />I <br /> <br />.17 - <br />