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<br />'• CO-CPA-1 U. S, Dept. of Agriculture
<br />4/32 Soil Conservatioq Service
<br />1 (180-1:-11)
<br />CQ9SERVA7'IQl PLAIT MAP AND
<br />SOIL AND CAPJ<BII.ITY F'J~Y LEGEND SREET
<br />Different kinds of soil, range sites, or vooAland sites are separated on thr
<br />map by solid back lines. Within each area is an identifying symSol or
<br />name. The following symbols arc sho.m on your map:
<br />Cascajo Scrics - Ca. E
<br />The Cascajo series consists of deep, excessively
<br />drained soils. These :;oils formed on terraces in gra-
<br />velly sandy alluvium. The slope is 5 to 25 percent, and
<br />elevation is 4,400 to G,000 feet The average annual
<br />precipitation is 12 inches. The average annual tem-
<br />perature is 53° r, and the frost-free scagan is 195 to
<br />175 days. The native vegetation is mainly plains
<br />grasses.
<br />In a repreaenLltive profile (fig. 2) the surface ]ayer
<br />is light-brown very gravelly sandy loam about 10
<br />inches thick. The next layer is very pale brown very
<br />gravelly sandy loam about 11 inches thick. And below
<br />that is very pale brown stratified gravel and sand that
<br />extends to a depth of GO inches or more
<br />Permeability is r:lpid, and the available water
<br />capacity is low. Thc;e soils arc mildly alkaline to
<br />moderately alkaline. Their root zone extends to a depth
<br />of GO inches or more. Tllcse soils arc a source of gravel
<br />for commercial use.
<br />RepresenLltive profile of Cascajo very gravelly
<br />sandy loam, 5 to 25 pcrccnt slopes, in native grass,
<br />0.33 mile north of lllc solltl+ gllartcr corner of sec. 15,
<br />T. 21 S., R. G9 1i'.
<br />A]-0 to G incl+ca, liC~ht-brown (T.;YR G/4) very gravelly
<br />sanJy loam, Jrrrk brown (T.:II'R 4/3) when moist; mod-
<br />erate, medium, granular structure; slightly hard, very
<br />friable; nonstitky anJ nonelastic; GO percent gravel and
<br />cobbles; calcareous; moJcratcly alkaline; clear, wavy
<br />boundary.
<br />AC-G to ]0 inches, li Cllt-brown (T.SYR f,/1) very gmvclly
<br />annrly loam, Jark brown (T.fiYli ~/:1) when moist: weak,
<br />mcvlium, subangalnr bl«ky structure; hard, very friable;
<br />nonplnstic; fiG percent gravel and cobble; enlenrcoaa;
<br />moJcratcly nikaliric; clear, irregular boundary.
<br />Clcn-10 to 21 inches, very pale brown (lOYR RJt) very
<br />gravelly anndy loam, pale brown (lOYR G/9) when
<br />moist; single grai ncd; IInrA, loose; nonstitky and non-
<br />plariic; fi0 pcrccnt gravel, 2U pcrccnt cobblca; enlenreour,
<br />thick lime coatings on bottom of pebble amt cobble;
<br />moJerntely alkaline; clear, wavy Iaundnry.
<br />CZ-21 to GO inche, very ll:+lc brown (lOYlt 7/7) stratified
<br />grovel anJ Coarse cant, brown (IOYII L/~) when moist;
<br />single grainivl; loose; rronslicky amt nonplasGe• GO pcr-
<br />ccnt gravel, 20 percent cobbles; calcareous; moderately
<br />alkaline.
<br />The A7, AC, oral Clea Iwriram range from very gravelly
<br />sandy loam Lo very gravelly snnJ. Coarse fragarenla make
<br />up .lr to KO pcrccnt a( lbc la hurimn, and L l0 2G percent
<br />of these fragnwnla an-'hrurc than a i«he in diameter.
<br />C:+Is-Cascajo very gnvclly s:lndy loam, S to 2fi
<br />percent stapes. This soil is on high alluvial terraces
<br />along the major drainageways. 1'hc areas cover as
<br />much as 'L00 acres. This soil has the profile described
<br />as rcprescntalivc of the series, but in small arcs in
<br />lllc soulllweslcrn part of the survey arcs along the
<br />Tfuddy Creek drainageway it has a thicker, darker
<br />colored surface layer, and in other areas on Lhe I't.
<br />Gerson Military Reservation it is redder.
<br />]ncludc<1 with this soil in mapping arc areas of
<br />Cascljo-Sllale outcrop complex in narrow strips on
<br />very steep side slopes aloof; the Arkansas River. These
<br />areas make up about 20 pcrccnt of Lhe acreage.
<br />]tunofi is moderately slow, and the hazard of erosion
<br />IS Sllgllt
<br />This soil is a source of commercial gravel. Tn many
<br />places near Pueblo, fete gravel is strip mined down to
<br />fete underlying shale. This soil etas potential for tvild-
<br />lifc habitat. 'fhc native vegetation iz mosUy bloc
<br />gr:,ma, sired +lrnpsccd, ncc<1lcandthrcad, cactus, and
<br />yucca (Gq. 3). Capability unit Vlls-2, nonirrigatcd;
<br />Cr:n'd 13rcaks r:u+>•c site.
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