LOCATION CEDARPOINT UTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Calcic Argixerolls
TYPICAL PEDON: Cedarpoint loam, on a north facing, linear to concave, 48 percent slope in Gambel oak at an elevation of 6,412 feet. (Colors are for dry soil unless otherwise noted.) The surface is covered by 10 percent gravel of mixed quartzite and limestone origin and angular in shape.
A1--0 to 4 inches; dark grayish brown (10YR 4/2) loam, very dark gray (10YR 3/1) moist; moderate fine and very fine granular structure; soft, friable, slightly sticky and slightly plastic; many very fine, few fine, medium, and coarse roots; many very fine, common fine interstitial and tubular pores; 5 percent gravel, 5 percent channers; slightly alkaline (pH 7.6); clear smooth boundary.
A2--4 to 14 inches; dark grayish brown (10YR 4/2) silt loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure parting to moderate fine and very fine granular; slightly hard, friable, slightly sticky and slightly plastic; many very fine, few fine, medium, and coarse roots; many very fine, few fine interstitial and tubular pores; 5 percent gravel, 5 percent channers; slightly alkaline (pH 7.6); clear wavy boundary. (total thickness of A horizons - 7 to 18 inches thick)
Bt--14 to 20 inches; yellowish brown (10YR 5/4) cobbly silty clay loam, brown (10YR 4/3) moist; moderate medium subangular blocky structure parting to moderate fine and very fine subangular blocky; hard, firm, moderately sticky and moderately plastic; common very fine, few fine, medium, and coarse roots; many very fine, few fine tubular pores; common patchy distinct clay films on ped faces; 10 percent gravel, 10 percent cobbles; slightly alkaline (pH 7.4); gradual wavy boundary. (5 to 25 inches thick)
Btk--20 to 27 inches; light yellowish brown (10YR 6/4) cobbly silty clay loam, brown (10YR 5/3) moist; moderate medium subangular blocky structure parting to moderate fine and very fine subangular blocky; very hard, very firm, moderately sticky and moderately plastic; common very fine, few fine, medium, and coarse roots; many very fine, few fine tubular pores; common patchy distinct clay films on ped faces; slightly effervescent, (6 percent calcium carbonate equivalent), carbonates are segregated in few fine irregular shaped soft masses and coatings on rock fragments less then 1 mm thick; 10 percent gravel, 10 percent cobbles; slightly alkaline (pH 7.8); clear wavy boundary. (5 to 8 inches thick)
Bk1--27 to 49 inches; very pale brown (10YR 7/4) gravelly silty clay loam, yellowish brown (10YR 5/4) moist; weak medium and coarse prismatic structure parting to moderate fine and very fine angular blocky; hard, firm, moderately sticky and moderately plastic; common very fine, few fine, medium, and coarse roots; many very fine, few fine tubular pores; violently effervescent, (16 percent calcium carbonate equivalent), carbonates are disseminated and segregated in many fine and medium irregular shaped soft masses and coatings on rock fragments less then 1 mm thick; 15 percent gravel, 5 percent cobbles; moderately alkaline (pH 8.4); gradual wavy boundary. (15 to 25 inches thick)
Bk2--49 to 60 inches; very pale brown (10YR 7/4) gravelly silty clay loam, yellowish brown (10YR 5/4) moist; weak medium prismatic structure parting to weak fine and very fine angular blocky; hard, firm, moderately sticky and moderately plastic; few very fine, fine, medium, and coarse roots; common very fine tubular pores; violently effervescent, (19 percent calcium carbonate equivalent), carbonates are disseminated and segregated in many fine and medium irregular shaped soft masses and coatings on rock fragments less then 1 mm thick; 20 percent gravel, 5 percent cobbles; moderately alkaline (pH 8.4).
TYPE LOCATION: Salt Lake County, Utah; about 1 miles NW of Cedar Point; located about 1,100 feet east and 1,800 feet north of the southwest corner of sec. 31, T. 4 S., R. 1 W.; Jordan Narrows USGS quad; lat. 40 degrees 25 minutes 31.97 seconds N. and long. 111 degrees 59 minutes 48.12 seconds W., NAD 27
RANGE IN CHARACTERISTICS:
Soil moisture regime: Xeric moisture regime. Soil moisture control section is dry 45 to 60 consecutive days following the summer solstice.
Soil temperature regime: frigid
Mean annual soil temperature: 43 to 47 degrees F.
Surface rock fragments: 0 to 15 percent of mixed angular quartzite and limestone fragments; dominantly gravel and channers.
Particle-size control section: 27 to 35 percent clay; 0 to 35 percent rock fragments, dominantly gravel and cobbles of mixed quartzite and limestone origin.
Depth to secondary calcium carbonate: 15 to 30 inches
Thickness of the mollic epipedon: 10 to 20 inches; may include the upper part of the argillic horizon.
Thickness of the argillic horizon: 10 to 33 inches
A horizon:
Hue: 10YR
Value: 3 or 4 dry, 2 or 3 moist
Chroma: 1 to 3
Texture: loam, silt loam
Rock fragments: 0 to 15 percent; dominantly gravel and channers
Reaction: neutral to slightly alkaline
Bt horizon:
Hue: 7.5YR, 10YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 2 to 4
Texture: silty clay loam, clay loam
Rock fragments: 15 to 35 percent; dominantly gravel and cobbles
Reaction: neutral to slightly alkaline
Btk horizon:
Hue: 7.5YR, 10YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 2 to 4
Texture: silty clay loam, clay loam
Rock fragments: 15 to 35 percent; dominantly gravel and cobbles
Calcium carbonate equivalent: 1 to 10 percent
Reaction: slightly alkaline to moderately alkaline
Bk horizon:
Hue: 7.5YR, 10YR
Value: 5 to 7 dry, 4 to 6 moist
Chroma: 2 to 4
Texture: silt loam, silty clay loam, clay loam
Rock fragments: 15 to 35 percent; dominantly gravel and cobbles
Calcium carbonate equivalent: 15 to 35 percent
Reaction: moderately alkaline
COMPETING SERIES: These are the Bess (UT), Border T (ID), Chesnimnus (OR), Fewkes T (UT), Justesen (ID), McCarey (ID), Pegram T (ID), Vicking (UT), Vickton (ID) series.
Bess soils formed in igneous rock, have 0 to 15 percent gravel in the particle size control section, and are dry in the soil moisture control section for more than 60 days., Justesen, and McCarey: has xeric bordering on aridic moisture regimes.
Border and Pegram soils have substratum layers with greater than 35 percent rock fragments.
Chesnimnus soils have a lithological discontinuity.
Fewkes soils have 0 to 15 percent rock fragments in the particle size control section.
Justensen soils have 0 to 10 percent rock fragments in the particle size control section and are dry in the soil moisture control section for more than 60 days.
McCarey soils have basalt at 20 to 40 inches and are dry in the soil moisture control section for more than 60 days.
Vicking soil are derived from dominantly intermediate igneous rocks.
Vickton soils have bedrock at 40 to 60 inches in depth.
GEOGRAPHIC SETTING: Cedarpoint soils.
Parent material: colluvium derived from mixed quartzite and limestone.
Landform: mountain slopes.
Slopes: 20 to 60 percent
Elevation: 5,200 to 7,300 feet
Mean annual air temperature: 41 to 45 degrees F.
Mean annual precipitation: 16 to 22 inches.
Wettest months: October to May.
Driest months: June to September.
Frost-free period: 70 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Vitale and Onaqui series. Vitale soils are moderately deep to bedrock. Onaqui soils are shallow to bedrock and under sagebrush.
DRAINAGE AND PERMEABILITY: Well drained, high runoff, moderately slow permeability.
USE AND VEGETATION: Wildlife habitat and rangeland. Some potential native plants are Gambel oak, mountain snowberry, bluebunch wheatgrass, and mountain brome.
DISTRIBUTION AND EXTENT: Northern Utah. LRR D, MLRA 28A. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona.
SERIES ESTABLISHED: Salt Lake county, Utah. 1999. The name comes from a nearby geographic location.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: The zone from 0 to 14 inches. (A1 and A2 horizons)
Argillic horizon: The zone from 14 to 20 inches. (Bt and Btk horizons)
Calcic horizon: The zone from 27 to 60 or more inches. (Bk1 and Bk2 horizons)
Keys to Soil Taxonomy: Eighth Edition 1998