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<br />012-11 to 15 inches; reddish gray (5YR 5/2) loam,
<br />dark reddish brown (5YR 3/2) moist; moderate fine
<br />and medium granular and subangular blocky
<br />structure; soft, very friable, slightly sticky and slightly
<br />plastic; medium acid; clear wavy boundary.
<br />B1-15 to 30 inches; reddish brown (5YR 4/3) heavy
<br />loam, dark reddish brown (5YR 3/4) moist; weak
<br />medium and coarse subangular blocky structure;
<br />slightly hard, friable, slightly sticky and slightly
<br />plastic; 5 percent gravel; slightly acid; clear wavy
<br />boundary.
<br />132-30 to 42 inches; reddish brown (5YR 5/4) clay
<br />loam, reddish brown (5YR 4/4) moist; moderate
<br />medium and coarse subangular blocky structure;
<br />hard, friable, slightly sticky and slightly plastic; 10
<br />percent gravel and cobbles; slightly acid; clear
<br />irregular boundary.
<br />C1-42 to 60 inches; reddish brown (2.5YR 5/4) cobbly
<br />clay loam, reddish brown (2.5YR 4/4) moist; organic
<br />mottles that are dark red (2.5YR 3/6) when moist;
<br />massive; hard, firm, sticky and plastic; 20 percent
<br />gravel and cobbles; neutral.
<br />The surface litter is 1 inch to 5 inches thick. The
<br />profile is 5 to 15 percent rock fragments ranging from
<br />gravel to small stones in size above the C horizon and
<br />15 to 30 percent below.
<br />Thornburgh series
<br />The Thornburgh series consists of deep, well drained
<br />soils on mountainsides. These soils formed in alluvium
<br />and colluvium derived from sandstone. Slope is 15 to 65
<br />percent. Average annual precipitation is about 18 inches,
<br />and average annual air temperature is about 43 degrees
<br />F.
<br />These soils are loamy-,'Keletal, mixed Typic
<br />Cryoborolls.
<br />Typical pedon of a Thornburgh channery loam in an
<br />area of Jerry-Thornburgh-Rhone complex, 8 to 65
<br />percent slopes, about 950 feet south and 600 feet east
<br />of the northwest corner of sec. 30, T. 2 N., R. 92 W.
<br />All-0 to 5 inches; very dark grayish brown (10YR 3/2)
<br />channery light loam, very dark brown (10YR 2/3)
<br />moist; moderate very fine and fine subangular
<br />blocky and granular structure; soft, very friable,
<br />slightly sticky and nonplastic; 20 percent channery
<br />fragments; mildly alkaline; clear smooth boundary.
<br />A12-5 to 14 inches; dark grayish brown (10YR 4/2)
<br />channery loam, very dark brown (10YR 2/2) moist;
<br />weak medium and coarse subangular blocky
<br />structure parting to weak fine granular; slightly hard,
<br />very friable, slightly sticky and slightly plastic; 20
<br />percent channery fragments and few angular
<br />cobbles; mildly alkaline; clear wavy boundary.
<br />102-14 to 27 inches; brown (7.5YR 5/4) very channery
<br />loam, dark brown (7.5YR 3/4) moist; weak fine and
<br />Soil survey
<br />medium subangular blocky structure; slightly hard,
<br />very friable, slightly sticky and nonplastic; 35 percent
<br />channery fragments and 15 percent angular
<br />cobbles; mildly alkaline; clear wavy boundary.
<br />C1-27 to 60 inches; pale brown (10YR 6/5) very
<br />channery sandy loam, brown (10YR 4/3) moist;
<br />weak fine and medium subangular blocky structure;
<br />slightly hard, very friable, slightly sticky and
<br />nonplastic; 40 percent channery fragments and 15
<br />percent angular cobbles; mildly alkaline.
<br />The 10- to 40-inch control section is 35 to 65 percent
<br />rock fragments. The profile has hue of 2.5Y to 7.5YR. In
<br />some pedons weak accumulations of lime are in the
<br />lower part of the C1 horizon.
<br />Tisworth series
<br />The Tisworth series consists of deep, well drained
<br />soils on valley floors and broad fans. These soils formed
<br />in alluvium weathered mainly from sedimentary rock with
<br />a high content of gypsum and alkaline salt. Slope is 0 to
<br />5 percent. Average annual precipitation is about 14
<br />inches, and average annual air temperature is about 43
<br />degrees F.
<br />These soils are fine-loamy, mixed Borollic Natrargids.
<br />Typical pedon of Tisworth fine sandy loam, 0 to 5
<br />percent slopes, 650 feet east and 150 feet north of the
<br />southwest corner of the NW1 /4 of sec. 5, T. 1 N., R. 96
<br />W.
<br />A2-0 to 4 inches; pale brown (10YR 6/3) fine sandy
<br />loam, brown (10YR 4/3) moist; weak medium and
<br />coarse platy structure; slightly hard, very friable,
<br />nonsticky and nonplastic; calcareous; strongly
<br />alkaline; abrupt wavy boundary.
<br />B2t-4 to 11 inches; light yellowish brown (10YR 6/4)
<br />clay loam, yellowish brown (10YR 5/4) moist;
<br />moderate medium and coarse prismatic structure
<br />parting to moderate medium subangular blocky;
<br />hard, friable, slightly sticky and slightly plastic;
<br />common thin clay films on ped faces; calcareous;
<br />very strongly alkaline; clear wavy boundary.
<br />C1ca-11 to 20 inches; very pale brown (10YR 7/3) fine
<br />sandy loam, light yellowish brown (10YR 6/4) moist;
<br />weak coarse subangular blocky structure; hard,
<br />friable, nonsticky and slightly plastic; common to
<br />many fine concretions and crystals of gypsum and
<br />calcium carbonate; calcareous; very strongly
<br />alkaline; clear wavy boundary.
<br />C2-20 to 60 inches; very pale brown (10YR 7/3) fine
<br />sandy loam, light yellowish brown (10YR 6/4) moist;
<br />massive; hard, very friable, nonsticky and nonplastic;
<br />calcareous; very strongly alkaline.
<br />The Al horizon, where present, has hue of 10YR to
<br />5YR, value of 5 to 7 when dry and 4 or 5 when moist,
<br />and chroma of 2 to 4 when dry and 3 or 4 when moist.
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