LOCATION PARKCITY UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Pachic Haplocryolls
TYPICAL PEDON: Parkcity gravelly loam, aspen woodland on a northwest facing, convex, 47 percent slope in aspen woodland at an elevation of 7,800 feet. (Colors are for moist soil unless otherwise noted.) When described on August 19, 1975, the soil was dry throughout.
The surface is covered by 25 percent gravel.
A1--0 to 5 inches; very dark brown (10YR 2/2) gravelly loam, very dark grayish brown (10YR 3/2) dry; moderate medium granular structure parting to weak fine granular; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine and common medium roots; few very fine pores; 20 percent gravel; slightly acid (pH 6.1); clear smooth boundary (2 to 8 inches thick).
A2--5 to 19 inches; very dark brown (10YR 2/2) gravelly loam, very dark grayish brown (10YR 3/2) dry; moderate medium subangular blocky structure parting to weak fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; many very fine, fine and common medium roots; many very fine pores; 20 percent gravel and 10 percent cobbles; slightly acid (pH 6.2); clear smooth boundary (10 to 20 inches thick).
Bw--19 to 36 inches; dark brown (10YR 3/3) very cobbly loam, dark brown (10YR 4/3) dry; weak and moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine, fine and few medium roots; many very fine pores; 15 percent gravel, 30 percent cobbles and 10 percent stones; slightly acid (pH 6.4); clear wavy boundary (10 to 20 inches thick).
C--36 to 60 inches; brown (10YR 4/3) very cobbly loam, yellowish brown (10YR 5/4) dry; massive; slightly hard, friable, slightly sticky and nonplastic; common very fine and few fine roots; few very fine pores; 20 percent gravel, 25 percent cobbles and 10 percent stones; slightly acid (pH 6.5).
TYPE LOCATION: Summit County, Utah; about 1 mile west of Park City; located about 2,500 feet south and 800 feet east of the northwest corner of sec. 17, T. 2 S., R. 4 E; Park City West, Utah USGS quad; lat. 40 degrees 38 minutes 53 seconds N. and long. 111 degrees 31 minutes 26 seconds W., NAD 1927
RANGE IN CHARACTERISTICS:
Soil moisture regime: Udic.
Mean annual soil temperature: 38 to 44 degrees F.
Mean annual summer soil temperature: 50 to 58 degrees F.
Surface rock fragments: 15 to 35 percent
Depth to lithic contact: Greater than 60 inches.
Thickness of the mollic epipedon: 16 or more inches
Particle-size control section: 12 to 18 percent clay and 35 to 60 percent rock fragments.
A horizon:
Hue: 10YR or 7.5 YR
Value: 2 or 3 moist, 3 or 4 dry
Chroma: 2 or 3 moist or dry
Texture: GR-L, VCB-L
Rock fragments: 15 to 35 percent
Reaction: Slightly acid or neutral
Bw horizon:
Hue: 10YR or 7.5YR
Value: 3 or 4 moist, 4 or 5 dry
Chroma: 3 or 4 moist or dry
Rock fragments: 35 to 60 percent
Reaction: Slightly acid or neutral
C horizon:
Hue: 10YR or 7.5YR
Value: 3 to 5 moist, 4 to 7 dry
Chroma: 3 or 4 moist or dry
Texture: CBV-L, CBV-SL
Rock fragments: 35 to 60 percent
Reaction: Slightly acid or neutral
COMPETING SERIES: These are the Baconcamp, Behanco, Behanin, Belsac, Blanca, Busterback, Caballo, Campone, Croesus, Dateman, Gateview, Hapgood, Harcany, Hobacker, Lionhead, Lolon, Marcetta, Nagitsy, Namela, Nazaton, Nevtah, Papaspila, Poleline, Povey, Prong, Snag, Snopoc, Spearhead, Splitbutte and Tonigut series.
Behanco : have a lithic contact within 60 inches
Behanin, Papaspila: have 18 to 25 percent clay in the particle-size control section.
Belsac: is 25 to 40 inches to a paralithic contact.
Blanca: lacks B horizons.
Busterback: has 2C horizons of COS, GRX-COS, or CBX-S.
Caballo: has 18 to 35 percent clay in the particle-size control section and the depth to bedrock is 40 to more than 60 inches.
Campone: has more than 18 percent clay in the particle-size control section and has redox features in the C horizon.
Baconcamp,
Croesus,
Dateman,
Nagitsy,
Namela, Neutah,
Prong, Splitbutte: have bedrock at 20 to 40 inches.
Gateview: depth to carbonates is 40 to 60 or more inches.
Hapgood,
Poleline, Snag: has bedrock at 40 to 60 inches.
Harcany: lack B and C horizons and have a volcanic ash influence.
Hobacker: has carbonate accumulation at 6 to 20 inches and has a lithological discontinuity at 20 to 40 inches.
Lionhead: has calcium carbonate accumulation from 18 to 37 inches.
Lolon: has a gravelly or very gravelly sand 2C at 20 to 40 inches.
Marcetta: has more than 18 percent clay in the particle-size control section.
Nazaton: has 15 to 25 percent clay in the particle-size control section and has an O horizon.
Povey: has bedrock at 40 to 60 inches and is dry for 45 to 100 consecutive days following the summer solstice.
Spearhead: depth to uniformly calcareous materials is 16 to 40 inches.
Snopoc: are dry for 45 or more consecutive days following the summer solstice and rock fragments in the particle-size control section are granite
Tonigut: has a paralithic contact from 40 to 60 inches.
GEOGRAPHIC SETTING:
Parent material: Colluvium, slope alluvium and residuum derived from limestone, quartzite and sandstone.
Landform: Mountain slopes.
Slopes: 15 to 60 percent
Elevation: 5,600 to 9,800 feet
Mean annual air temperature: 35 to 40 degrees F.
Mean annual precipitation: 22 to 35 inches.
Wettest months: April through June.
Driest months: July through September.
Frost-free period: 20 to 60 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Agassiz,
Crandall,
Dromedary and
Hades series.
Agassiz: Shallow soil on ridges under sagebrush.
Crandall: Deep soil on higher mountain slopes under sagebrush.
Dronedary: Very deep dryer soil under oak brush.
DRAINAGE AND PERMEABILITY: Well drained, medium to high runoff, moderate permeability.
USE AND VEGETATION: The major use is watershed and wildlife habitat. Native vegetation is Aspen, western wheatgrass, mountain brome, columbine, rose and a few Douglas fir and spruce.
DISTRIBUTION AND EXTENT: North Central Utah. LRR E, MLRA 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 from a nearby town.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: The zone from 0 to 36 inches. (A1, A2 and Bw horizons)
Keys to Soil Taxonomy: Eighth Edition, 1998.
ADDITIONAL DATA: