2002-04-11_REVISION - M1986159 - Laserfiche WebLink

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PUEBLO AREA, COLORADO thick lime coatings on bottom or pebbles and cobbles; modentelp alkallnc; dear, wavy boundary. C2-21 to 60 inches, very pole brown (tOYR 7/3) atrsGfied gravel and caarse sand, brown (lOYR 6/J1 when moist; single gained; loose; nonsticky and nonplastir; 50 per- cent gravel, 20 percent cobbles; vales reoun; moderately alkaline. The At, AC, and Clta horizons nnRe from very grtvelly ur.dy loam to very grseclly sand. Cuaras fragments make up a5 to BO percrnt of the <:2 hari:an, and 5 to 25 ptreent of these fragments are more than a in<hts in diameter. :1 F;-('a.caio very gravelly sandy loam, 5 to 2.'i the underlying shale. This soil has potential for wild- life habitat. The native vegetation Is mostly blue grams, sand dropseed, needlcandthrcad, cactus, and yucca (fig. 3). Capability unit Vlls-2, nonirrigated; as zuu acres. on the scarps. range site; Shale outcrop not asslgnea co a range stte. Denver Series The Denver series consists of deep, well-drained soils. These soils formed on uplands in clayey alluvium or residuum that wa.9 derived from shale. T}te slope i~ 3 to 9 percent, and elevation is 6,000 to 7,200 feet. Thr average annual precipitation is 17 inches. T}te average annual temperature is 48° F, and the frost-free season is 115 to 145 days. The native vegetation is mainly plains grasses. In a representative profile the surface layer is grayish-brown clay loam about 7 inches thick. Thr upper part of the subsoil is grayish-brotvn clay loan and clay ntxrut 15 inches thick, and the lower part i~ grayish-brown clay about Lt inches thick. The under lying layer is grayish-brown clay about 74 inches thick This soil is a soune of commercial gravel. In many Ftvure J.-i'^scaio sail. can pro.ide auitahle food and co•er h places near Pueblo, the gravel is strip mined down to wnalite, but water is not araibble in many places. Fipure :.-I'roGlr of l"astajo yarn Rravelly candy Inam.