LOCATION TIMMERCREK NVEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Xeric Haplocryolls
TYPICAL PEDON: Timmercrek very gravelly peaty loam--forestland. (Colors are for dry soil unless other noted.) The soil surface is covered with approximately 25 percent pebbles, 10 percent cobbles, and 3 percent stones.
Oi--0 to 3 cm; partially decomposed leaves and conifer needles.
A1--3 to 10 cm: grayish brown (10YR 5/2) very gravelly peaty loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and nonplastic; many very fine and fine roots; common very fine interstitial pores; 40 percent pebbles and 10 percent stones; slightly acid (pH 6.3) clear wavy boundary. (3 to 13 cm thick)
A2--10 to 33 cm; brown (10YR 5/3) extremely gravelly loam, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine, fine, and medium, and few coarse roots; common very fine tubular and interstitial pores; 60 percent pebbles and 10 percent cobbles; slightly acid (pH 6.2); clear wavy boundary. (13 to 28 cm thick)
E1--33 to 56 cm; light gray (10YR 7/2) extremely gravelly sandy loam, grayish brown (10YR 5/2) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine through medium and few coarse roots; many very fine interstitial pores; 65 percent pebbles, 5 percent cobbles, and 5 percent stones; slightly acid (pH 6.4); clear wavy boundary. (18 to 25 cm thick)
E2--56 to 89 cm; light gray (10YR 7/2) extremely gravelly loamy coarse sand, grayish brown (10YR 5/2) moist; massive; soft, very friable, nonsticky and nonplastic; common very fine and fine, and few medium and coarse roots; many very fine and fine interstitial pores; 70 percent pebbles and 10 percent cobbles; slightly acid (pH 6.5); clear wavy boundary. (20 to 38 cm thick)
E and Bt--89 to 112 cm; light gray (10YR 7/2) extremely gravelly sandy loam, grayish brown (10YR 5/2) moist (E part); 10 percent 2 to 5 mm thick light brown (7.5YR 6/4) extremely gravelly sandy loam, strong brown (7.5YR 4/6) moist, lamellae (Bt part); massive; slightly hard, very friable, slightly sticky and slightly plastic; few very fine and fine roots; common very fine tubular and interstitial pores; common faint clay films bridging sand grains within lamellae; 60 percent pebbles and 5 percent cobbles; slightly acid (pH 6.4); clear wavy boundary. (25 to 50 cm thick)
C--112 to 152 cm; light gray (10YR 7/1) extremely gravelly sandy loam, gray (10YR 5/1) moist; massive, soft, very friable, nonsticky and nonplastic; few very fine roots; common very fine tubular and interstitial pores; 65 percent pebbles and 5 percent cobbles; slightly acid (pH 6.4).
TYPE LOCATION: White Pine County, Nevada;, about 1,000 feet east of Wheeler Peak Campground in Great Basin National Park; USGS Windy Peak 7.5 minute topographic quadrangle; approximately latitude 39 degrees, 00 minutes, 40 seconds N and longitude 114 degrees, 17 minutes, 59 seconds W; UTM zone 11, 733804e, 4321473n, NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture - Usually moist in the moisture control section in winter, spring, and early summer, dry in all parts 45 to 60 consecutive days following the summer solstice (July and August), but intermittently moist in the upper part for 10 to 20 days cumulative due to convection storms between July and September; snow covered from November through April; upper part is saturated for about 15 to 20 consecutive days during snowmelt in April and/or May; Xeric soil moisture regime.
Soil temperature: 3 to 5 degrees C.
Mean summer soil temperature: 7 to 8 degrees C.
Base saturation: 50 to 70 percent.
Mollic epipedon thickness: 25 to 40 cm.
Particle-size control section - Clay content: Average 12 to 18 percent.
Rock fragments: 65 to 85 percent, dominantly pebbles.
A horizons - Value: 4 or 5 dry, 2 or 3 moist. Values 4 dry and 2 moist occur only in A1.
Chroma: 2 or 3, dry or moist.
E horizons - Chroma 2 or 3, dry or moist.
Texture: Coarse sandy loam, loamy coarse sand or sandy loam.
Clay content: 5 to 18 percent.
Rock fragments: 65 to 85 percent, dominantly pebbles.
Reaction: Moderately acid or slightly acid.
E and Bt horizons - Chroma: 1 or 2, dry or moist, lamella have a chroma of 4 through 6.
Texture: Dominantly sandy loam, with strata of loamy coarse sand or coarse sandy loam often present.
Clay content: Averages 12 to 18 percent.
Rock fragments: 65 to 85 percent, dominantly pebbles.
Reaction: Moderately acid or slightly acid.
Other features: 2 to 5 mm thick sandy loam or sandy clay loam lamellae are present, with cumulative thickness of 3 to 13 cm.
COMPETING SERIES: These are the
Basinpeak,
Berrycreek,
Decram,
Fairydell,
Foxmount,
Gaia,
Klug,
Krackle,
Lag,
Middlehill,
Rockabin,
Steepshrub,
Sup, and
Wareagle series.
Basinpeak soils have 18 to 25 percent clay in the particle-size control section.
Berrycreek soils do not have lamellae and average 18 to 27 percent clay and 45 to 65 percent rock fragments in the particle-size control section.
Decram soils have a lithic contact at 50 to 100 cm.
Fairydell soils have Bk and Bqk horizons and have 20 to 25 percent clay in the particle-size control section.
Foxmount soils have a paralithic contact at 50 to 100 cm.
Gaia soils do not have cambic horizons, do not have lamellae, and have MSST of 12 to 15 degrees C.
Klug soils do not have lamellae, do not have O horizons and have MSST of 9 to 12 degrees C.
Krackle soils have a lithic contact at 50 to 100 cm.
Lag soils have do not have lamellae in the C horizon and do not have E horizons.
Middlehill soils have a lithic contact at 50 to 100 cm.
Rockabin soils have a paralithic contact at 50 to 100 cm.
Steepshrub soils have 85 to 95 percent rock fragments in the C horizon and do not have lamellae.
Sup soils have rock fragments with dominantly andesitic and granitic lithology, do not have lamellae and have MSST of 12 to 14 degrees C.
Wareagle soils do not have lamellae and average 40 to 70 percent rock fragments with rhyolitic or welded tuff lithology.
GEOGRAPHIC SETTING: Timmercrek soils are on moraines. These soils formed in glacial till dominantly from quartzite, with local admixture from shale or argillite. Slopes are 15 to 50 percent. Elevations are 2,840 to 3,430 meters. The climate is humid with cold wet winters and cool dry summers. The mean annual precipitation is 600 to 950 mm, most of which falls as snow. The mean annual temperature is 1.5 to 4 degrees C., and the frost-free season is 30 to 50 days.
GEOGRAPHICALLY ASSOCIATED SOILS: This is the Jumble series. Jumble soils have an ochric epipedon.
DRAINAGE AND PERMEABILITY: Well drained; high runoff; moderately rapid permeability; high saturated hydraulic conductivity.
USE AND VEGETATION: Recreation, watershed and wildlife habitat. The potential native vegetation is mainly quaking aspen, Engelmann spruce, and limber pine. This site is correlated to Ecological Site F28AY078NV Quaking aspen-Engelmann's spruce-mountain snowberry, mountain brome and slender wheatgrass.
DISTRIBUTION AND EXTENT: East Central Nevada. MLRA 28A. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: White Pine County, Great Basin National Park, Nevada, 2009. The name is coined.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from 3 to 33 cm (A1 and A2 horizons).
Albic horizon - The zone with albic materials from 33 to about 112 cm (E1, E1 and E and Bt horizons).
Cambic horizon - The zone from 33 to 56 cm (E1 horizon).
Particle-size control section - The zone from about 25 to 100 cm (lower A2, E1, E2 and upper E and Bt2 horizons).
ADDITIONAL DATA: The typical pedon at the series type location is partially sampled for the Soil Survey Laboratory (SSL), Lincoln, NE, as soil survey sample number S91NV-033-004 (pedon # 92P0146).