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MESA GRAVELLY CLAY LOAM (5%to 10°k slopes) Map Symbol "MoC This soil is on old high terraces and along small streams that have cut into the terraces. It has a profile that is similar to the one described as typical of the Mesa Senes, but the surface layer is 15 to 40 percent gravel and cobblestones. Most of the acreage is west of the Uncomphgre River. RAVOLA ROCK OUTCROP ii ROUGH BROKEN LA Rock outcrop and Rough broken land (Rr) is made up of shallow soils and bare rock outcrops on the steeply sloping sides of mesas The higher parts consist of massive Gifts of Cretaceous sandstone, and the lower parts of mixed collwium. The slope range is 10 to 40 percent. Included in the areas mapped are soils like those described as typical Travessilla series and scattered pockets of Shavano soils. The main acreage is in the western part of the [Delta- This generally is used as native range. It Is used as corpland only where it oHurs in fields with soils that are tilled. This soli is difficult to irrigate because of the slope and is difficult to till because of the gravel and cobblestones. It is not highy susceptible to erosion. (Cap. Unit ~'irl nortirrigated; I. c-2 imgated) ~D, Map Symbol "Rr" Montrose] Area. This land type supports a fair cover of grasses, sage, and cactus, and a scattering of juniper. It is suitable only as range. The steep slopes and areas of Rock outcrop restrict the movement of Livestock and lint the amount of forage available to them. Erosion Is a moderate hazard, and julhes are common. (Capability unit VI Is-3 nonirrigated) Map Symbol "Ru" Rough broken land (Ru) is on the steeply sloping (Delta-Montrose] Area but is mainly in the westem sides of mesas. It consists of exposures of and soulheastem parts. sedimentary shale and sandstone, extrrrnely gravely allwral material, collwlal debris, and shallow soils. This land type is unsuitable for tllage and is used Typically, Orchardand Mesa soils have formed in the exGusivety as native range. It supports a fair to good gravelly alluvium, which is at the upper part Of the cover of native grass, sage, pctus, and brush, Many slopes. Midway on the slope are almost barren areas are bare, and the steep upper slopes cannot exposures of sedimentary shale and sandstone. At bereached by cattle. Nevertheless, these areas are the base are shallow soils, ex posures of sedimentary valuable as range and fumish grazing late in summer rock, and cdlwial debris. The slope range is 10 to and in fall. (Capability unit Vlls-3 nonimgated) Fi0 percent This land type occurs throughout the MACK CLAY LOAM (2 to 5% slopes) Map Symbol "Ma8" This sdl is On upland slopes and old alluvial fans. It yields of suitable crops i( well managed. It is mae has a profile siimilar to the one descrobed as typicaai difficult to irrigate than Mack Gay loam, 0 to 2 percent of the Mack series. Most of the acreage is in the slopes. It is moderately susceptible to erosion if westem third of the (Delta-Montrose] Area poorly managed. (Capability Unit Vle-lnon-imgated; This soil is suited to tilled crops and produces good I Ile-1 irrigated SHAVANO SANDY CLAY LOAM, (5°k to 10% slopes) Map Symbol "ShC" This soil is on the tops of mesas and on upland hlUs This soil supports a fair cover of native grass. brush, and ridges. It has a profile similar to the one and scattered trees and is used mairdy as range. It is described as typical of the Shavano series. Most of not suitable for tillage. It is moderately susceptible ro the acreage is in the westemn and soulheagstem erosion. (Capability unit Vle•1) parts of the (De7a•Monfrose] Area. I 7 he wnd and gravel resources to he mined at this site arc obviously best deuribed as the A4r~~~u (7ur Luanr, nrup symhol M/A soils. Only they have hewn found to have up to 250 E 1 MontrosoCo 1 SruvanoCirav 1 AmandAppl 1 Exhl tattroa