LOCATION FOY                     UT

Established Series
Rev. LDS/CW/JWB
03/2011

FOY SERIES

The Foy series consists of very deep, well drained soils that formed in a mantle of alluvium and colluvium derived from basalt and sedimentary rocks underlain by alluvium and/or weathered residuum from sedimentary bedrock. Foy soils are on structural benches and mountain slopes. Slopes range from 3 to 60 percent. Mean annual precipitation is about 36 cm and the mean annual temperature is about 5 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Aridic Calciustepts

TYPICAL PEDON: Foy very stony fine sandy loam, on a northeast facing, 6 percent slope in pinyon pine and Utah juniper at an elevation of 2,097 meters. (Colors are for dry soil unless otherwise noted.) When described on March 14, 2006 the soil was slightly moist throughout. The surface is covered by 1 percent boulders, 10 percent stones, 20 percent cobbles and 25 percent gravel of basalt origin and 2 percent sedimentary channers.

A--0 to 10 cm; brown (7.5YR 5/2) very stony fine sandy loam, dark grayish brown (10YR 4/2) moist; weak fine granular structure; soft, very friable, slightly sticky and slightly plastic; common coarse, medium, fine and very fine roots; common very fine interstitial pores; 1 percent boulders, 10 percent stones, 15 percent cobbles and 25 percent gravel; slightly effervescent (2 percent calcium carbonate equivalent), carbonates are finely disseminated; slightly alkaline (pH 7.5); clear wavy boundary. (10 to 12 cm thick)

Bw--10 to 26 cm; brown (7.5YR 5/3) cobbly fine sandy loam, brown (7.5YR 4/3) moist; weak medium and fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common coarse, medium, fine and very fine roots; many very fine tubular pores; 2 percent stones, 12 percent cobbles and 15 percent gravel; strongly effervescent (4 percent calcium carbonate equivalent), carbonates are finely disseminated; slightly alkaline (pH 7.6); clear wavy boundary. (15 to 16 cm thick)

Bk1--26 to 44 cm; light brown (7.5YR 6/4) very cobbly loam, brown (7.5YR 5/3) moist; moderate medium and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common coarse, medium, fine and very fine roots; common fine and very fine tubular pores; 3 percent stones, 15 percent cobbles and 20 percent gravel; strongly effervescent (10 percent calcium carbonate equivalent), carbonates occur as common fine threads and thin faint very pale brown (10YR 7/3), dry carbonate coats on bottom of rock fragments; slightly alkaline (pH 7.8); gradual wavy boundary.

Bk2--44 to 99 cm; very pale brown (10YR 7/3) very gravelly fine sandy loam, grayish brown (10YR 5/2) moist; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky and moderately plastic; few coarse, medium, fine and common very fine roots; few fine and common very fine tubular pores; 3 percent stones, 10 percent cobbles, 5 percent channers and 35 percent gravel; violently effervescent (18 percent calcium carbonate equivalent), carbonates are segregated as many medium very pale brown (10YR 8/3), dry coats around rock fragments and finely disseminated throughout; moderately alkaline (pH 8.2); clear wavy boundary.

Bk3--99 to 118 cm; pale brown (10YR 6/3) very stony loam, brown (10YR 4/3) moist; weak medium and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few medium and fine and common very fine roots; few fine and common very fine tubular pores; 8 percent stones, 15 percent cobbles, 5 percent parachanners and 15 percent gravel; violently effervescent (15 percent calcium carbonate equivalent), carbonates are segregated as common fine threads and many moderately thick distinct very pale brown (10YR 7/3), dry coats around rock fragments and are finely disseminated in matrix; moderately alkaline (pH 8.3); clear wavy boundary. (combined thickness of the Bk horizons is 92 to 120 cm)

BCk--118 to 200 cm; pale brown (10YR 6/3) very cobbly sandy loam, dark grayish brown (10YR 4/2) moist; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky and nonplastic; few fine and very fine roots; many very fine interstitial and common very fine tubular pores; 3 percent stones, 20 percent cobbles, 2 percent channers and 30 percent gravel; strongly effervescent (12 percent calcium carbonate equivalent), carbonates are segregated as common thin faint very pale brown (10YR 7/3), dry coats around rock fragments and are finely disseminated in matrix; moderately alkaline (pH 8.4).

TYPE LOCATION: Sevier County, Utah; about 1 mile north of the northwest corner of Capitol Reef National Park; located about 80 feet east and 400 feet north of the SW corner of sec. 17, T. 26 S., R. 5 E.; Geyser Peak USGS quad; lat. 38 degrees 32 minutes 32 seconds N. and long. 111 degrees 23 minutes 54 seconds W., NAD 83

RANGE IN CHARACTERISTICS:

Soil moisture: The soil moisture control section is affected by precipitation that peaks from July to October and falls evenly throughout the remainder of the year; ustic moisture regime bordering on aridic.
Mean annual soil temperature: 4.4 to 8.3 degrees C
Depth to cambic horizon: 10 to 12 cm
Depth to calcic horizon: 27 to 44 cm
Thickness of the cambic horizon: 15 to 16 cm
Thickness of the calcic horizon: 74 to 121 cm

Particle-size control section (weighted average):
Clay content: 15 to 27 percent
Rock fragments: 35 to 65 percent boulders, stones, cobbles, channers, parachanners and gravel

A horizon:
Hue: 7.5YR or 10YR
Value: 5 or 6 dry, 3 to 5 moist
Chroma: 2 to 4 dry or moist
Texture: very bouldery fine sandy loam, very stony fine sandy loam, very cobbly fine sandy loam
Clay content: 10 to 20 percent
Rock fragments: 35 to 60 percent
Fragment size and content: <p> 0 to 15 percent basalt boulders
5 to 35 percent basalt stones
5 to 20 percent basalt cobbles
10 to 35 percent basalt or sedimentary gravel
Calcium carbonate equivalent: 1 to 10 percent
EC (mmhos/cm): 0 to 2
SAR: 0 to 3
Reaction: neutral to moderately alkaline

Bw horizon:
Hue: 7.5YR or 10YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 3 or 4 dry or moist
Texture: cobbly fine sandy loam, very cobbly fine sandy loam, very cobbly loam
Clay content: 12 to 25 percent
Rock fragments: 15 to 60 percent
Fragment size and content: <p> 0 to 15 percent basalt boulders
0 to 25 percent basalt stones
8 to 30 percent basalt cobbles
10 to 20 percent basalt or sedimentary gravel
Calcium carbonate equivalent: 2 to 10 percent
EC (mmhos/cm): 0 to 4
SAR: 0 to 5
Reaction: slightly to strongly alkaline

Bk horizon:
Hue: 7.5YR to 2.5Y
Value: 6 to 8 dry, 4 to 6 moist
Chroma: 2 to 4 dry or moist
Texture: very cobbly loam, very cobbly sandy clay loam, channery clay loam, very gravelly fine sandy loam, very cobbly sandy loam
Clay content: 12 to 35 percent
Rock fragments: 15 to 60 percent
Pararock fragments: 0 to 30 percent
Fragment size and content: <p> 0 to 20 percent basalt stones
2 to 30 percent basalt cobbles
0 to 30 percent sedimentary channers
0 to 30 percent sedimentary parachanners
5 to 50 percent basalt or sedimentary gravel
Calcium carbonate equivalent: 5 to 32 percent
EC (mmhos/cm): 0 to 4
SAR: 0 to 5
Reaction: slightly to strongly alkaline

BCk horizon:
Hue: 7.5YR to 2.5Y
Value: 6 or 7 dry, 5 or 6 moist
Chroma: 3 to 6 dry or moist
Texture: very cobbly sandy loam, very cobbly loam, very parachannery clay loam
Clay content: 10 to 35 percent
Rock fragments: 35 to 60 percent
Pararock fragments: 0 to 60 percent
Calcium carbonate equivalent: 5 to 25 percent
EC (mmhos/cm): 0 to 4
SAR: 0 to 5
Reaction: moderately or strongly alkaline

COMPETING SERIES: These are the Barkelew, Bronec, Devilsthumb, Tabyago, Wildmount and Yampa series.
Barkelew soils have 27 to 35 percent clay in the particle-size control section.
Bronec and Yampa soils are less than 20 cm to the calcic horizon and do not have cambic horizons.
Devilsthumb and Tabyago soils are moderately deep to bedrock.
Wildmount soils do not have the surface mantle of basalt alluvium or colluvium.

GEOGRAPHIC SETTING:
Parent material: a basalt mantle of alluvium and colluvium over alluvium, colluvium and residuum from sedimentary rocks.
Landform: alluvial fans, structural benches and mountain slopes.
Slopes: 3 to 50 percent.
Elevation: 1,981 to 2,591 meters
Mean annual temperature: 3.3 to 7.2 degrees C
Mean annual precipitation: 30 to 41 cm
Precipitation pattern: precipitation is 1.9 cm to 2.5 cm per month from November to June; in March it increases to 3.8 to 5 cm. In July to October, thunderstorms increase the precipitation to 3.2 to 4.4 cm per month, with approximately 40 percent of the yearly precipitation occurring in these months.
Frost-free period: 85 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Lakebench and Podo series. The Lakebench soils have less than 35 percent rock fragments in the particle-size control section and are in concave, gently sloping positions. The Podo soils are shallow to bedrock and are on mountain slopes near rock outcrop.

DRAINAGE AND PERMEABILITY: Well drained, low to medium runoff, moderate permeability.

USE AND VEGETATION: These soils are used for range and woodland. Vegetation is pinyon pine, Utah juniper, blue grama, galleta, Indian ricegrass, Salina wildrye, Wyoming big sagebrush, roundleaf buffaloberry and mountain mahogany. Upland Stony Loam (Pinyon-Utah Juniper) R035XY321UT ecological site.

DISTRIBUTION AND EXTENT: South central Utah; LRR E, MLRA 47. This series is of moderate extent; about 3,760 hectares in Emery, Sevier and Wayne counties.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Sevier County, Utah, Emery area soil survey, Utah, 2011. Named for Foy bench near the type location.

REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Series control section: The zone from 0 to 200 cm.
Particle-size control section: The zone from 25 to 100 cm. (Bk1, Bk2, Bk3 horizons)
Ochric epipedon: The zone from 0 to 10 cm. (A horizon)
Cambic horizon: The zone from 10 to 26 cm. (Bw horizon)
Calcic horizon: The zone from 44 to 118 cm. (Bk2, Bk3 and BCk horizons)

The assignment of the cation-exchange activity class is inferred from lab data from similar soils in the surrounding area.

Taxonomic Version: Eleventh edition, 2010

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National Cooperative Soil Survey
U.S.A.