LOCATION FOXMOUNT NV+CA ID
Established Series
Rev. JBF/TM
11/2016
FOXMOUNT SERIES
The Foxmount series consists of moderately deep, well drained soils that formed in residuum and colluvium derived from tuff and associated volcanic flow rock. Foxmount soils are on mountain crests and side slopes. Slopes are 15 to 50 percent. The mean annual precipitation is about 400 mm and the mean annual temperature is about 6 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Xeric Haplocryolls
TYPICAL PEDON: Foxmount loam - rangeland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 8 cm; very dark brown (10YR 2/2) loam, black (10YR 2/1) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine and fine interstitial pores; 10 percent gravel; neutral (pH 7.2); abrupt smooth boundary. (5 to 15 cm thick)
A2--8 to 38 cm; dark grayish brown (10YR 4/2) very gravelly loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine and fine roots; common very fine and fine interstitial pores; 35 percent gravel, 5 percent cobbles, and 5 percent stones; neutral (pH 7.0); clear smooth boundary. (8 to 30 cm thick)
Bw--38 to 81 cm; grayish brown (10YR 5/2) very cobbly loam, dark yellowish brown (10YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine and fine roots; common very fine and fine interstitial pores; 30 percent gravel, 20 percent cobbles, and 5 percent stones; neutral (pH 7.0); gradual smooth boundary. (10 to 48 cm thick)
C--81 to 94 cm; yellowish brown (10YR 5/4) extremely stony loam, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, friable, nonsticky and nonplastic; few fine roots; few fine interstitial pores; 20 percent gravel, 25 percent cobbles, and 20 percent stones; neutral (pH 7.0); abrupt wavy boundary. (13 to 76 cm thick)
Cr--94 cm; weathered rhyolite.
TYPE LOCATION: Eureka County, Nevada; about 37 miles northwest of Eureka, 2,200 feet north and 1,000 feet west of the southeast corner of section 28, T. 22 N., R. 48 E; USGS Shagnasty 7.5 minute topographic quadrangle; latitude 39 degrees 44 minutes 34 seconds N and longitude 116 degrees 34 minutes 31 seconds W; WGS84 Decimal Degrees 39.7427778 latitude, -116.5752778 longitude.
RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and spring; dry late June through mid-October; xeric soil moisture regime.
Mean annual soil temperature: 4 to 6 degrees C.
Average summer soil temperature:6 to 8 degrees C with 0i horizon; 12 to 15 degrees C without 0i horizon.
Mollic epipedon thickness: 18 to 38 cm.
Thickness of A and Bw horizons: 46 to 90 cm.
Depth to paralithic bedrock: 60 to 100 cm.
Other features: There are appreciable quantities of vitric pyroclastic materials in the profile.
Mottles; the lower part of the profile of some pedons have mottles of 7.5YR or 5YR hue and chroma of 3 to 6 due to parent material weathering.
Reaction: Slightly acid or neutral.
Particle-size control section - Clay: 10 to 20 percent.
Rock fragments: Averages 50 to 70 percent gravel, cobbles, and stones.
A horizon
Hue 10YR or 7.5YR.
Value: 2 through 5 dry, 2 or 3 moist.
Chroma: 1 or 2, (1 is only in the A1 horizon)
Bw horizon
Hue: 10YR or 7.5YR.
Value: 5 through 7 dry, 3 or 4 moist.
Chroma: 2 through 4.
Texture: Very gravelly loam, very gravelly fine sandy loam or very cobbly loam.
Rock fragments: Averages 35 to 60 percent mainly gravel or cobbles with some pedons having a few stones.
Structure: Weak or moderate, fine to coarse subangular blocky.
C horizon
Hue: 10YR or 7.5YR.
Value: 5 through 7 dry, 4 or 5 moist.
Chroma: 2 through 4.
Texture: Very cobbly loam, very cobbly sandy loam, extremely cobbly loam, extremely cobbly sandy loam.
Rock fragments: 20 to 50 percent gravel; 25 to 50 percent cobbles and stones.
COMPETING SERIES: These are the
Basinpeak,
Decram,
Fairydell,
Gaia,
Klug,
Krackle,
Lag,
Middlehill,
Rockabin,
Sup,
Timmercrek, and
Wareagle series.
Basinpeak,
Fairydell,
Gaia,
Klug,
Lag,
Sup,
Timmercrek, and
Wareagle are greater than 100 cm to bedrock.
Decram and
Krackle soils are over hard bedrock.
Middlehill soils have secondary carbonate at 28 to 91 cm.
Rockabin soils contain 35 to 60 percent gravel that are dominated by 2 to 5 mm. in size, and is dominated by coarse sand.
GEOGRAPHIC SETTING: Foxmount soils are on mountain crests and side slopes. These soils formed in residuum and colluvium derived from tuff and associated volcanic flow rocks. Slopes are 8 to 50 percent. Elevations are 1,975 to 2,930 meters. The climate is cool, semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 360 to 560 mm, mean annual temperature is 2 to 5 degrees C, and the frost-free season is 30 to 50 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Hackwood,
Haunchee and
Winu soils. Hackwood soils are deeper than 150 cm to bedrock. Haunchee soils are less than 50 cm to bedrock. Winu soils have 15 to 35 percent rock fragments in the control section.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; slow or medium runoff; moderately high saturated hydraulic conductivity.
USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly curlleaf mountainmahogany, bluebunch wheatgrass, Thurber's needlegrass and mountain big sagebrush.
DISTRIBUTION AND EXTENT: North-western and north-central Nevada. These soils are not extensive. MLRA 28B.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Eureka County Area, Nevada, 1983.
REMARKS: The series type was moved to Eureka County in 2006 to better reflect the series concept.
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 38 cm (A1 and A2 horizons)
Cambic horizon - The zone from 38 to 81 cm (Bw1 and Bw2 horizons)
Paralithic contact - The boundary at 94 cm (Cr layer)
Particle-size control section - The zone from 25 to 94 cm (Bw2, part of the Bw1 and C horizons).
National Cooperative Soil Survey
U.S.A.