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Saguache County Area, Colorado
<br />seams, and as coatings on the bottom of pebbles;
<br />calcareous; moderately alkaline: clear smooth
<br />boundary.
<br />IICca-13 to 60 inches; extremely gravelly sand; some
<br />visible carbonates coating rock fragments;
<br />calcareous; moderately alkaline.
<br />Depth to the calcareous material ranges from 6 to 20
<br />inches. Depth to the TIC horizon and depth to the base
<br />of the argillic horizon range from 11 to 20 inches. Rock
<br />fragments are mainly 1 /2 inch to 10 inches in diameter.
<br />pes Moines Series
<br />The Des Moines series consists of deep, well drained
<br />soils that are on tans on alluvial valley floors. These soils
<br />famed in alluvium. The slope is 0 to 2 percent. The
<br />average annual precipitation is about 12 inches, and the
<br />average annual air temperature is about 41 degrees F.
<br />These soils are clayey-skeletal, montmorillonitic Pachic
<br />ArgiborollS.
<br />Typical pedon of Oes Moines gravelly clay loam, 0 to 2
<br />percent slopes, about 1,700 feet east and 100 feet south
<br />or Ine NW corner of sec. 29, T. 42 N., R, 7 E.
<br />At-0 to 6 inches; gray (tOYR 5/1) gravelly clay loam,
<br />very dark gray (10YR 3/1) moist; weak 1me granular
<br />structure; slightly hard, friable, sticky and plastic; 75
<br />percent gravel and 10 percent cobblestones; mildly
<br />alkaline; clear smooth boundary.
<br />8211-6 to t2 inches; gray (10YR 5/t) very gravelly
<br />heavy silty clay loam, very dark gray (tOYR 3!t)
<br />moist; moderate fine subangular blocky structure;
<br />hard, friable, sticky and plastic; 25 percent gravel
<br />and 10 percent cobblestones; mildly alkaline; Clear
<br />smooth boundary.
<br />8221-t2 to 77 inches; gray (tOYR 5/t) very gravelly
<br />heavy sandy clay loam, very dark gray (tOYR 3/t)
<br />moist; moderate medium subangular blocky
<br />structure; very hard, Triable, sticky and slightly
<br />plastic; 40 percent gravel and 10 percent
<br />cobblestones; mildly alkaline; clear wavy boundary.
<br />Ct-17 to 25 inches; light brownish gray (tOYR 6/2)
<br />very cobbly sandy clay loam, dark grayish brown
<br />(tOYR d12) moist; massive; slightly hard, friable,
<br />nonsticky and nonplastic; 30 percent gravel and 20
<br />percent cobblestones; mildly alkaline; gradual wavy
<br />lxwndary.
<br />~-26 to 60 inches; light brownish gray (tOYR 6/2)
<br />extremely cobbly sandy clay loam, dark grayish
<br />brown (tOYR 4!2) moist; massive: slightly hard,
<br />triable, sticky and slightly plastic: 25 percent gravel
<br />and 50 percent cobblestones; mildly alkaline.
<br />jhe 821t horizon is a silty clay or clay loam tnat is 35
<br />50 percent rock fragments. The H221 honzon is 35 to
<br />93
<br />to 60 percent gravel and t0 to 50 percent cobblestones.
<br />Thin, neaAy continuous clay films are in the B horizon.
<br />The Des Moines soils in Saguache County Area are
<br />slightly drier than the soils of the Des Moines series, anc
<br />there/ore, they are taxadjuncts to the series. For Des
<br />Moines soils in the survey area, the average annual
<br />precipitation is about 12 inches; but for the series, it is
<br />about 20 inches.
<br />Dunul Series
<br />The Dunul series consists of deep, somewhat
<br />excessively drained soils that are on fans and terraces
<br />on alluvial valley floors. These soils formed in very
<br />gravelly alluvium. The slope is 0 to 1 percent. The
<br />average annual precipitation is about 7 inches, and the
<br />average annual air temperature is about 41 degrees F.
<br />These soils are sandy-skeletal, mixed, frigid Typic
<br />7orriorthents.
<br />Typical pedon of Dunul very gravelly sandy loam,
<br />about 250 leer nosh and 50 feet west of the SE corner
<br />of sec. 35, T. at N., R. 7 E.
<br />Ap-0 to 6 inches; brown (tOYR 5/3) eery gravelly
<br />sandy loam, dark brown (tOYR 4/3) moist; weak
<br />tine granular structure; slightly hard, very triable,
<br />nonsticky and nonplastic; 50 percent gravel, 10
<br />percent cobblestones; calcareous; moderately
<br />alkaline; clear smooth boundary.
<br />Ctca-6 to t4 inches; pale brown (10YR 6/3) very
<br />gravelly sand, brown (lOYR 4/3) moist; many
<br />distinct (tOYR 8/4) coatings, and disseminated
<br />calcium carbonate; massive; loose, nonsticky and
<br />nonplastic: about 45 percent gravel, 15 percent
<br />cobblestones; calcareous; moderately alkaline; clear
<br />smooth boundary.
<br />Gt-t4 to 60 inches; pale brown very gravelly sand;
<br />about 45 percent gravel and 15 percent
<br />cobblestones.
<br />Depth to calcareous material and depth to the Cca
<br />horizon range from 4 to 10 inches. Rock fragments make
<br />up 35 to 75 percent of the soil profile.
<br />Garita Series
<br />The Garita series consists of deep, well drained soils
<br />on tans and loot slopes. These soils formed in
<br />calcareous gravelly alluvium derived mainly from basalt.
<br />The slope is 0 to 35 percent. The average annual
<br />precipitation is about 7 inches, and the average annual
<br />air temperature is about 41 degrees F.
<br />These soils are loamy-skeletal, mixed, (rigid Typic
<br />Calciorthids.
<br />Typical pedon of Garita gravelly loam, 0 to 3 percent
<br />slopes, about 2,100 feet south and 1,200 feet west of
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