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RECEIVED
<br />Saguache County Area, Colorado •
<br />~ 'APR 19 1999 s5
<br />Div~s~un of Minerals 6 Geology
<br />hard, friable, slightly sticky and slightly plastic; 15
<br />percent gravel; neutral; clear smooth boundary.
<br />82g-8 to 12 inches; grayish brown (10YR 5/2) gravelly
<br />sandy clay loam, dark brown (10YR 3/2) moist;
<br />common medium distinct yellowish brown (tOYR
<br />5/4) mottles; weak fine granular structure; slightly
<br />hard, friable, slightly sticky and slightly plastic; 20
<br />percent gravel, 10 percent cobblestones; neutral;
<br />clear smooth boundary.
<br />IIC2-12 to 60 inches; variegated but mainly light brown
<br />very gravelly loamy sand; 30 percent gravel, 10
<br />percent cobblestones; neutral.
<br />Depth to the seasonal water table is 1.0 to 1.5 feet.
<br />Depth to the IIC horizon ranges from 12 to 20 inches.
<br />The upper part of the control section is 20 to 35 percent
<br />clay. Hue ranges from 5Y through 7.SYR. Mottling
<br />ranges from distinct to prominent.
<br />Graypoint Series
<br />The Graypoint series consists of deep, well drained
<br />soils on broad fans and terraces on alluvial valley floors.
<br />These soils formed in alluvium derived principally from
<br />basalt. The slope is 0 to 3 percent. The average annual
<br />precipitation is about 8 inches, and the average annual
<br />air temperature is about 41 degrees F.
<br />These soils are fine-loamy over sandy or sandy-
<br />skeletal, mixed, frigid Typic Haplargids.
<br />Typical pedon of Graypoint gravelly sandy loam, 0 to 3
<br />percent slopes, about 150 feet south and 1,750 feet
<br />west of the NE corner of sec. 32, T. 42 N., R. 7 E.
<br />Al-0 to 4 inches; grayish brown (10YR 5/2) gravelly
<br />sandy loam, dark grayish brown (10YR 4/2) moist;
<br />weak coarse platy structure that parts to weak tine
<br />granular; soft, very friable, nonsticky and nonplastic;
<br />about 20 percent gravel; mildly alkaline; clear
<br />smooth boundary.
<br />B2t-4 to 10 inches; grayish brown (10YR 5/2) sandy
<br />clay loam, dark grayish brown (10YR 4/2) moist;
<br />weak coarse prismatic structure that parts to
<br />moderate medium subangular blocky; hard, friable,
<br />sticky and plastic; thin nearly continuous clay films
<br />on ped Taces; about 10 percent gravel; mildly
<br />alkaline; clear smooth boundary.
<br />Baca-10 to 13 inches; light brownish gray (tOYR 6/2)
<br />gravelly sandy clay loam, grayish brown (10YR 5/2)
<br />moist; weak coarse subangular blocky structure;
<br />hard, friable, sticky and slightly plastic; thin patchy
<br />clay films on ped Laces and coating pebbles; 25
<br />percent gravel; calcium carbonate coating bottom of
<br />pebbles; calcareous; mildly alkaline; clear smooth
<br />boundary.
<br />C1ca-13 to 16 inches; pale brown (10YR 6/3) very
<br />gravelly sandy loam, brown (10YR 5/3) moist;
<br />massive; soft, very friable, nonsticky and nonplastic;
<br />visible calcium carbonate in seams and streaks and
<br />coating bottom of pebbles; 30 percent gravel and 10
<br />percent cobblestones; calcareous; moderately
<br />alkaline; clear smooth boundary.
<br />IIC-16 to 60 inches; light gray (10YR 7/2) very gravelly
<br />sand, rock fragments are mostly basalt, light
<br />brownish gray (10YR 6/2) moist; single grained;
<br />loose, nonsticky and nonplastic; calcareous spots in
<br />upper part; moderately alkaline.
<br />Depth to calcareous material ranges from 6 to 20
<br />inches. As much as 10 to 35 percent of the major part of
<br />the solum is rock fragments. Clay content in the argillic
<br />horizon ranges from 20 l0 35 percent.
<br />Gunbarrel Series
<br />The Gunbarrel series consists of deep, somewhat
<br />poorly drained and poorly drained soils on terraces and
<br />low fans on alluvial valley floors. These soils formed in
<br />alluvium. The slope is 0 to 1 percent. The average
<br />annual precipitation is about B inches, and the average
<br />annual air temperature is about 41 degrees F.
<br />These soils are mixed, frigid Typic Psammaquents.
<br />Typical pedon of Gunbarrel loamy sand, about 1,860
<br />feet east and 25 feet north of the SW corner of sec. 20,
<br />T. 41 N., R. 10 E.
<br />Al-0 to 5 inches; grayish brown (10YR 5/2) loamy
<br />sand, dark brown (tOYR 3/3) moist; weak Tine
<br />granular structure; soft, very friable, nonsticky and
<br />nonplastic; moderately alkaline; clear smooth
<br />boundary.
<br />C1-5 to 23 inches; brown (10YR 5/3) loamy sand, dark
<br />yellowish brown (10YR 3/4) moist; weak coarse
<br />subangular blocky structure; slightly hard, very
<br />friable, nonsticky and nonplastic; calcareous;
<br />strongly alkaline; clear smooth boundary.
<br />C2g-23 to 28 inches; light gray (10YR 6/1) loamy sand,
<br />dark grayish brown (10YR 4/2) moist; massive;
<br />slightly hard, very friable, nonsticky and nonplastic;
<br />calcareous; strongly alkaline; clear smooth
<br />boundary.
<br />C3-28 to 60 inches; variegated brown and gray coarse
<br />sands; massive; soft, loose, nonsticky and
<br />nonplastic; moderately alkaline.
<br />Depth to the seasonal water table is 1.5 to 2.0 feet
<br />unless the soil is drained. Depth to calcareous material
<br />ranges from 0 to 20 inches. Coarse fragments make up
<br />0 to 15 percent of the control section.
<br />In the Al and C horizons, hue ranges from SY through
<br />7.SYR. The texture of the C horizon ranges from loamy
<br />sand to sand.
<br />Hagga Series
<br />The Hagga series consists of deep, poorly drained
<br />soils on low-lying flood plains on alluvial valley floors.
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