LOCATION SNYDERVILLE UT+IDEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Pachic Argixerolls
TYPICAL PEDON: Snyderville gravelly loam on a south facing linear 2 percent slope in pasture at an elevation of 7,020 feet. (Colors are for moist soil unless otherwise noted.) When described on August 12, 1997, the soil was moist from 10 to 28 inches. The surface is covered by 20 percent gravel, 5 percent cobbles and 1 percent stones.
A1--0 to 10 inches; very dark brown (10YR 2/2) gravelly loam; dark grayish brown (10YR 4/2) dry; weak fine granular texture; slightly hard, friable, slightly sticky and slightly plastic; many very fine, few fine, and medium roots and many very fine tubular pores; 15 percent gravel and 5 percent cobbles; neutral (pH 6.8); clear smooth boundary (6 to 12 inches thick).
A2--10 to 16 inches; very dark grayish brown (10YR 3/2) gravelly loam, grayish brown (10YR 5/2) dry; weak fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; many very fine, few fine and medium roots and many very fine tubular pores; 15 percent gravel and 5 percent cobbles; neutral (pH 6.8); clear smooth boundary (5 to 15 inches thick).
Bt--16 to 28 inches; dark brown (7.5YR 3/3) very gravelly sandy clay loam; brown (7.5YR 5/3) dry; moderately fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; many very fine, few fine and medium roots and many very fine tubular pores; common distinct clay films on faces of peds; 30 percent gravel and 10 percent cobbles; neutral (pH 7.0); clear wavy boundary.(5 to 15 inches thick)
2C--28 to 35 inches; brown (7.5YR 4/3) very cobbly loamy sand; light brown (7.5YR 6/3) dry; weak fine subangular blocky structure; soft, very friable, non-sticky and non-plastic; common very fine and few fine roots; many very fine irregular pores; 35 percent gravel, 15 percent cobbles and 5 percent stones; neutral (pH 7.2); clear wavy boundary (5 to 15 inches thick).
3C--35 to 60 inches; brown (7.5YR 4/3) extremely cobbly sand; light brown (7.5YR 6/3) dry; single grain; loose; few very fine roots; many very fine interstitial pores; 45 percent gravel, 20 percent cobbles, and 5 percent stones; neutral (pH 7.2) clear wavy boundary.
TYPE LOCATION: Summit County, Utah; about 2.5 miles southeast of Woodland; located about 100 feet east and 2000 feet north of the southwest corner of sec. 17, T. 3S., R. 7 E.; Woodland, Utah USGS quad; lat. 40 degrees 33 minutes 25 seconds N. and long. 111 degrees 11 minutes 01 seconds W., NAD 1927
RANGE IN CHARACTERISTICS:
Soil moisture regime: Xeric; dry for 45 to 60 days following the summer solstice
Mean annual soil temperature: 42 to 47 degrees F.
Mean summer soil temperature: 58 to 65 degrees F.
Surface rock fragments: 15 to 35 percent
Depth to lithic contact: Greater than 60 inches
Thickness of the mollic epipedon: 20 to 36 inches
Particle-size control section (weighted average):
Clay content: 22 to 27 percent
A horizon (an Ap in some pedons):
Hue: 10YR or 7.5YR
Value: 2 or 3 moist, 4 or 5 dry
Chroma: 2 or 3 moist or dry
Texture: GR-L, CB-L, L
Rock fragments: 5 to 35 percent
Calcium carbonate equivalent: 0 to 3 percent
Reaction: slightly acid to slightly alkaline
Bt horizon:
Hue: 10YR or 7.5YR
Value: 3 or 4 moist, 5 or 6 dry
Chroma: 3 or 4
Texture: GRV-SCL, GRV-L, CBV-SCL, CBV-L
Rock fragments: 35 to 60 percent
Calcium carbonate equivalent: 0 to 3 percent
Reaction: slightly acid or slightly alkaline
2C and 3C horizons:
Hue: 10YR or 7.5YR
Value: 3 to 5 moist, 5 to 7 dry
Chroma: 3 or 4
Texture: CBV-LS, CBX-S, GRV-LS, GRX-S, GRV-COS
Rock fragments: 35 TO 75 percent
Calcium carbonate equivalent: 0 to 3 percent
Reaction: Neutral or slightly alkaline
COMPETING SERIES: These are the Bullump, Bullvaro, Burchflat, Camelback, Chrisflat, Dogbed, Dooh, Erig, Krenka, Leroman, Lockgate, Murain, Nutval, Softback, Softscrabble, Staberg, Vetagrande, and Vipont series.
Bullump, Camelback: have bedrock from 40 to over 60 inches and do not have sandy 2C horizons.
Bullvaro,
Chrisflat,
Dogbed,
Krenka, Murain: do not have sandy 2C horizons
Burchflat,
Erig,
Leroman,
Lockgate,
Staberg, Vipont: have a lithic or paralithic contact above 60 inches
Demner: has a soil moisture control section that is dry for 60 to 75 consecutive days in the four months following the summer solstice and particle-size control section has cobbles derived from igneous rock.
Dooh, Softback: has 27 to 32 percent clay in the particle-size control section and does not have a sandy substratum.
Nutval, Vetagrande: have weathered bedrock at 60 to 80 inches and do not have a sandy substratum.
Softscrabble: has 27 to 35 percent clay in the particle-size control section.
GEOGRAPHIC SETTING:
Parent material: Alluvium or outwash derived from quartzite and sedimentary rocks.
Landform: Stream terraces, outwash terraces, and fan remnants; including the riser position of fan remnants
Slopes: 0 to 20 percent
Elevation: 5,300 to 8,400 feet
Mean annual air temperature: 40 to 45 degrees F.
Mean annual precipitation: 16 to 22 inches.
Wettest months: March through May.
Driest months: July through September.
Frost-free period: 50 to 90 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Ant Flat,
Kovich,
Wanship and
Yeates Hollow series.
Ant Flat and Yeates Hollow: Fine textured soils on fan remnants
Kovich and Irim: Wet soils in valley bottoms
DRAINAGE AND PERMEABILITY: Well drained, low to medium runoff, moderate permeability in the upper part and rapid permeability in the lower part.
USE AND VEGETATION: The major use is livestock grazing. Native vegetation is mountain big sagebrush, wheatgrasses, bitterbrush and snowberry. In Utah the ecological site is Mountain Stony Loam (Mountain Big Sagebrush).
DISTRIBUTION AND EXTENT: North central Utah and southestern Idaho. LRR B and E, MLRA 13 and 47. This series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Summit County, Utah, 2000; Summit Area soil survey. The name is a community in Summit County.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: The zone from 0 to 28 inches. (A1, A2, and Bt horizons)
Argillic horizon: The zone from 16 to 28 inches. (Bt horizon)
Keys to Soil Taxonomy: Eleventh Edition, 2010.