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<br />
<br />GRAND COUNTY ARFl~, COLORADO
<br />Cr-43 to 60 inches; red (10R 576) extremely stony loam,
<br />c ~ red (tOR 4/6) moist; massive; slightly hard, friable,
<br />_ _ . slightly sticky and slightly plastic; 75 percent stones;
<br />neutral.
<br />The content of rock fragments in the B horizon ranges
<br />:-from 35 to 80 percent by volume. The reaction ranges
<br />from neutral to medium acid.
<br />The A2 horizon has hue of 10YR through 5YR, value
<br />-_ pf 5 through 8 dry, 4 through 7 moist, and chroma of 2
<br />`through 4. The B2t horizon has hue of 5YR through 10R,
<br />value of 5 through 7 dry, 4 through 6 moist, and chroma
<br />of 2 through 6. It is clay loam or sandy clay loam and is
<br />=: extremely stony or very stony. Some pedons have a thin
<br />'. Al horizon..~...r.,.~_,.~s-:•~:.-~.: _.~_.. w_
<br />.. Leavitt series I nr
<br />The Leavitt series consists of deep, well drained soils„
<br />~' that (~yned in local alluvial material weathered from
<br />-~ sedimentary rock. Leavitt soils are on fans, terraces, and
<br />mountainsides. Slopes are 0 to 55 percent. The average
<br />_ annual precipitation is about 16 inches, the average
<br />-: annual air temperature is about 39 degrees F, and the
<br />frost-free season is about 35 to 75 days. Elevations are
<br />.• 7,500 to 8,500 feet.
<br />Leavitt soils are similar to Lymanson, Mayoworth,
<br />Woodhall, Cimarron, Youga, and Quander soils and are
<br />near Harsha, Roxal, and Lymanson soils. Lymanson,
<br />Mayoworth, Roxal, and Woodhall soils have bedrock
<br />:: above a depth of 40 inches. Cimarron, Youga, and
<br />Ouander soils lack secondary lime above 40 inches. The
<br />.. Harsha soil has a fl~inner dark colored surface layer.
<br />Typical pedon of Leavitt loam, 0 to 6 percent slopes,
<br />about 0.5 mite east of Hot Sulphur Springs, 2,600 feet
<br />east and 500 feet north of southwest corner sec. 2, T. 1
<br />N., R. 78 W.
<br />A4=0 to 6 inches; grayish brown (tOYR 5/2) loam, very
<br />-`:dark grayish brown (10YR 3/2) moist; moderate
<br />> -<medium platy structure parting to weak fine granular;
<br />__` very triable, slightly sticky and slightly plastic; neu-
<br />- '. trot; clear smooth boundary.
<br />81=6 to 10 inches; brown (10YR 4/3) loam, dark brown
<br />;.' (tOYR 3/3) moist; moderate medium subangular
<br />- ~' :`'blocky structure; slightly hard, very friable, slightly
<br />• ~. sticky and slightly plastic neutral; clear smooth
<br />_ `~' -boundary.
<br />~';~1t-10 to 17 inches; brown (tOYR 5/3) light clay
<br />' `• loam; brown (10YR 4/3) moist; moderate medium
<br />- ->:'.subangular blocky structure; slightly hard, very tri-
<br />- ~' able, sticky and- plastic; thin nearly Continuous clay
<br />_'i.t:.films on faces of peds; mildly alkaline; clear smooth
<br />= .boundary.
<br />...~?2[-17 to 25 inches; brown (10YR 5/3) light clay
<br />bam, brown (10YR 4/3) moist; weak medium pris-
<br />- ' ! '.. matic structure parting to weak medium angular
<br />:. blocky; slightly hard, very triable, sticky and plastic;
<br />•
<br />71
<br />thin continuous clay films on faces of peds; noncal-
<br />careous; mildly alkaline; clear smooth boundary.
<br />Baca-25 to 34 inches; light yellowish brown (10YR .6/4)
<br />light clay loam, yellowish brown (10YR 5/4) moist;
<br />weak medium subangular blocky structure; slightly
<br />hard, very triable, sticky and plastic; calcareous;
<br />moderately alkaline; visible lime seams, clear
<br />smooth boundary.
<br />Cca-34 to 60 inches; pale brown (10YR 6/3) light clay
<br />loam, pale brown (10YR 6/3) moist; massive; hard,
<br />very friable, sticky and plastic; calcareous; moder-
<br />ately alkaline; visible lime seams and streaks.
<br />The thickness of the solum ranges from 28 to 43
<br />inches. The content of rock fragments ranges from 0 to
<br />15 percent by volume. The depth to calcareous material
<br />ranges from 20 to 40 inches.
<br />The Al horizon has hue of 2.5Y through 7.SYR, value
<br />of 3 through 5 dry, 2 or 3 moist, and chroma of 1 or 2.
<br />Reaction is neutral or mildly alkaline. The B2t horizon
<br />has hue of 2.5Y through 7.SYR, value of 5 or 6 dry, 3
<br />through 5 moist, and chroma of 2 through 4. Reaction is
<br />neutral or mildly alkaline. The C horizon has hue of 2.5Y
<br />through 7.5YR. Reaction is moderately or strongly alka-
<br />line.
<br />teighcan series
<br />The Leighcan series consists of deep, well drained
<br />soils thai formed in material weathered from granite and
<br />other. igneous rocks. Leighcan are on mountainsidas and
<br />ridges. Slopes are 15 to 70 percent. The average annual
<br />precipitation is about 32 inches, the average annual' air
<br />temper + :re is about 35 degrees F, and the Trost-free
<br />season is about 10 to 50 days. Elevations are 9,500 to
<br />11,400 Teet.
<br />Leighcan soils are similar to Grenadier, Scout, and
<br />Newcomb soils and are near Newcomb, Scout, Upson,
<br />A4eredilh, Bross, and Minor soils. The subsoil of Grena-
<br />dier soils is more than i8 percent clay. Newcomb, Scoui,
<br />and Upson soils have a base saturation greater than 60
<br />percent to a depth of 30 inches. Meredith, Bross, and
<br />Mirror soils all have'a thick dark colored surface horizon.
<br />Typical pedon of Leighcan gravelly sandy loam, 15 to
<br />70 percent slopes, about 25 miles south of Parshall and
<br />6 miles up the Kinney Greek road, sec. 21, T. 2 S., R. 77
<br />vr,
<br />Oi-2 inches to 0; undecomposed needles, twigs, and
<br />leaves.
<br />A2-0 to 5 inches; pinkish gray (7.5YR 6/2) gravelly
<br />sandy loam, brown (7.5YR 4/2) moist; weak thin
<br />platy structure; soft, very friable, slightly sticky and
<br />nonelastic; 20 percent gravel, 10 percent cobbles;
<br />strongly acid; clear smooth boundary.
<br />82-5 to 25 inches; brown (7.5YR 5/4) very cobbly
<br />sandy loam, dark brown (7.5YR 4/4) moist; weak
<br />coarse subangular blocky structure parting to weak
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