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Blanco County Area, Colorado
<br />a *a series
<br />The Razorba series consists of deep, well drained
<br />ils on mountainsides. These soils formed in residuum
<br />d colluvium derived from sandstone. Slope is 30 to 75
<br />rcent. Average annual precipitation is about 20 inches,
<br />d average annual air temperature is about 38 degrees
<br />These soils are coarse-loamy, mixed Pachic
<br />Voborolls.
<br />Typical pedon of Razorba channery sandy loam, 30 to
<br />percent slopes, about 1,900 feet west and 140 feet
<br />rth of the SW1 /4SE1 /4 of sec. 21, T. 3 S., R. 102 W.
<br />-1 inch to 0; litter of leaves, twigs, and bark in various
<br />stages of decomposition.
<br />1-0 to 9 inches; dark grayish brown (10YR 4/2)
<br />channery sandy loam, very dark grayish brown
<br />(10YR 3/2) moist; weak fine granular structure; soft,
<br />very friable, nonsticky and nonplastic; about 20
<br />percent channery fragments; calcareous; moderately
<br />alkaline; clear wary boundary.
<br />2-9 to 20 inches; dark grayish brown (10YR 4/2)
<br />channery sandy loam, very dark grayish brown
<br />(10YR 3/2) moist; weak fine granular structure; soft,
<br />very friable, nonsticky and nonplastic; about 30
<br />p cent channery fragments; calcareous; moderately
<br />e; clear wary boundary.
<br />3 to 35 inches; dark grayish brown (10YR 4/2)
<br />channery sandy loam, very dark grayish brown
<br />(10YR 3/2) moist; weak fine granular structure; soft,
<br />very friable, nonsticky and nonplastic; about 30
<br />percent channery fragments; calcareous; moderately
<br />alkaline; clear wavy boundary.
<br />-35 to 60 inches; grayish brown (10YR 5/2)
<br />channery sandy loam, dark grayish brown (10YR
<br />4/2) moist; massive; soft, very friable, nonsticky and
<br />nonplastic; about 25 percent channery fragments;
<br />calcareous; moderately alkaline.
<br />-he mollic epipedon is 16 to 40 inches thick. The A
<br />izon has value of 4 or 5 when dry, and it has chroma
<br />? or 3. The average content of coarse fragments,
<br />stly channery fragments, ranges from 15 to 25
<br />cent. The C horizon has value of 5 to 8 when dry,
<br />i it has chroma of 2 or 3. It is channery sandy loam or
<br />y channery sandy loam.
<br />dcreek series
<br />"he Redcreek series consists of shallow, well drained
<br />s on mountainsides and ridges. These soils formed in
<br />idy eolian and residual material derived from
<br />,areous sandstone. Slope is 5 to 30 percent. Average
<br />iual recipitation is about 15 inches, and average
<br />i temperature is about 43 degrees F.
<br />oils are loamy, mixed (calcareous), frigid Lithic
<br />is Torriorthents.
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<br />Typical pedon of a Redcreek sandy loam in an area of
<br />Redcreek-Rentsac complex, 5 to 30 percent slopes,
<br />about 900 feet north of the southwest corner of sec. 18,
<br />T. 3 S., R. 96 W.
<br />Al-0 to 4 inches; brown (7.5YR 5/4) sandy loam, dark
<br />brown (7.5YR 4/4) moist; weak fine granular
<br />structure; soft, very friable, nonsticky and nonplastic;
<br />mildly alkaline; clear smooth boundary.
<br />AC-4 to 11 inches; brown (7.5YR 5/4) sandy loam,
<br />dark brown (7.5YR 4/2) moist; weak medium
<br />subangular blocky structure parting to fine granular;
<br />soft, friable, nonsticky and nonplastic; calcareous;
<br />moderately alkaline; clear wavy boundary.
<br />C1-11 to 16 inches; very pale brown (10YR 7/3)
<br />channery sandy loam, light yellowish brown (10YR
<br />6/4) moist; massive; slightly hard, friable, nonsticky
<br />and nonplastic; calcareous; moderately alkaline;
<br />clear wavy boundary.
<br />R-16 inches; hard sandstone.
<br />Depth to sandstone ranges from 10 to 20 inches. The
<br />A horizon has hue of 10YR or 7.5YR, value of 5 or 6
<br />when dry and 4 or 5 when moist, and chroma of 2 to 4.
<br />The C horizon has value of 6 or 7 when dry and 5 or 6
<br />when moist, and it has chroma of 3 or 4.
<br />Redrob series
<br />The Redrob series consists of deep, somewhat poorly
<br />drained soils on alluvial valley floors, low terraces, and
<br />flood plains along major streams. These soils formed in
<br />mixed alluvium. Slope is 0 to 3 percent. Average annual
<br />precipitation is about 16 inches, and average annual air
<br />temperature is about 40 degrees F.
<br />These soils are fine-loamy over sandy or sandy-
<br />skeletal, mixed (calcareous), frigid Fluvaquentic
<br />Haplaquolls.
<br />Typical pedon of Redrob loam, 150 feet south and 730
<br />feet east of the northwest corner of sec. 29, T. 1 N., R.
<br />93 W.
<br />All-0 to 4 inches; grayish brown (10YR 5/2) light
<br />loam, dark brown (10YR 3/3) moist; weak coarse
<br />platy structure parting to moderate fine subangular
<br />blocky; slightly hard, very friable, slightly sticky;
<br />mildly alkaline; abrupt smooth boundary.
<br />A12-4 to 17 inches; grayish brown (10YR 5/2) loam,
<br />very dark grayish brown (10YR 3/2) moist; moderate
<br />fine and medium subangular blocky structure;
<br />slightly hard, friable, slightly sticky and slightly
<br />plastic; mildly alkaline; clear wavy boundary.
<br />AC-17 to 35 inches; grayish brown (10YR 5/2) stratified
<br />loam, sandy loam, and loamy sand, dark grayish
<br />brown (10YR 4/2) moist; faint variegated very dark
<br />gray (10YR 3/1, moist) and dark brown (10YR 3/3,
<br />moist) lenses; common fine and medium distinct
<br />strong brown (7.5YR 5/6, moist) and yellowish
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