LOCATION FOXMOUNT NV+CA IDEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Xeric Haplocryolls
TYPICAL PEDON: Foxmount gravelly loam - rangeland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 8 cm; very dark brown (10YR 2/2) gravelly 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 pebbles; 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 pebbles, 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 pebbles, 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 cobbly loam, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, friable, nonsticky and nonplastic; few fine roots; few fine interstitial pores; 20 percent pebbles, 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, 2,000 feet north and 900 feet west of the southwest corner of section 28, T. 22 N., R. 48 E; latitude 39 degrees 44 minutes 22.6 seconds N and longitude 116 degrees 34 minutes 31 seconds W, NAD83.
RANGE IN CHARACTERISTICS:
Soil moisture - Moist in winter and spring; dry late June through mid October.
Soil temperature - 4 to 5.5 degrees C.
Average summer soil temperature - 5.5 to 8 degrees C. with 0i horizon; 11.5 to 15 degrees C. without 0i horizon.
Mollic epipedon thickness - 18 to 38 cm.
Thickness of A and Bw horizons - 46 to 91 cm.
Depth to paralithic bedrock - 61 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.
Control section - Clay: 10 to 20 percent.
Rock fragments: Averages 50 to 70 percent pebbles, 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 pebbles 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 pebbles; 25 to 50 percent cobbles and stones.
COMPETING SERIES: These are the Basinpeak, Decram, Fairydell, Gaia, Klug(T), Krackle(T), Lag(T), 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 lime at 28 to 91 cm. Rockabin soils contain 35 to 60 percent pebbles 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 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 5.5 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 PERMEABILITY: Well drained; slow or medium runoff; moderate permeability.
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 OFFICE RESPONSIBLE: Reno, Nevada
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 0 to 38 cm (the A1 and A2 horizon)
Cambic horizon - the zone from 38 to 81 cm (the Bw1 and Bw2 horizon)
Paralithic- the layer at 94 cm (the Cr horizon)