LOCATION LADYOFSNOW              NV

Established Series
Rev: LJL/ET/TM
09/2015

LADYOFSNOW SERIES

The Ladyofsnow series consists of very deep, well drained soils that formed in colluvium derived from limestone and dolomite. Ladyofsnow soils are on upper backslopes of mountains. Slopes are 30 to 75 percent. The mean annual precipitation is about 560 millimeters and the mean annual air temperature is about 4 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, carbonatic Oxyaquic Calcicryepts

TYPICAL PEDON: Ladyofsnow gravelly silt loam, rangeland and wildlife habitat. (Colors are for dry soil unless otherwise noted.) The soil surface is covered by approximately 40 percent gravel, 3 percent cobbles, and 1 percent stones.

Oi--0 to 1 centimeters; brown (10YR 4/3) slightly decomposed needles and twigs, very dark brown (10YR 2/2); abrupt smooth boundary. (0 to 5 centimeters thick)

E--1 to 19 centimeters; yellowish brown (10YR 5/4) gravelly silt loam, dark yellowish brown (10YR 3/4) moist; moderate coarse subangular blocky structure; moderately hard, very friable, slightly sticky and slightly plastic; few very fine to medium roots throughout; many very fine tubular pores; 15 percent gravel and 1 percent cobbles; noneffervescent (1 percent calcium carbonate equivalent in the fine earth fraction); slightly alkaline (pH 7.6); abrupt wavy boundary. (10 to 23 centimeters thick)

2Bhkq--19 to 28 centimeters; very dark grayish brown (10YR 3/2) very gravelly loam, black (10YR 2/1) moist; weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine and common fine through very coarse roots; common very fine tubular pores; 40 percent fine prominent irregular moderately cemented white (10YR 8/1) carbonate nodules with sharp boundaries on bottom of rock fragments and 10 percent fine prominent irregular moderately cemented brownish yellow (10YR 6/6) opal with sharp boundaries on bottom of rock fragments; 40 percent gravel; very slightly effervescent (60 percent calcium carbonate equivalent in the fine earth fraction); moderately alkaline (pH 8.2); clear wavy boundary. (0 to 10 centimeters thick)

2Bkq1--28 to 47 centimeters; dark grayish brown (10YR 4/2) extremely gravelly coarse sandy loam, black (10YR 2/1) moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and nonplastic; many very fine, common fine through very coarse roots; common very fine and fine tubular and common very fine through medium interstitial pores; 40 percent fine prominent irregular moderately cemented white (10YR 8/1) calcium carbonate nodules with sharp boundaries on bottom of rock fragments and 10 percent fine prominent irregular moderately cemented brownish yellow (10YR 6/6) opal with sharp boundaries on bottom of rock fragments; 70 percent gravel and 1 percent cobbles; slightly effervescent (75 percent calcium carbonate equivalent in the fine earth fraction); moderately alkaline (pH 8.0); clear wavy boundary. (18 to 53 centimeters thick)

2Bkq2--47 to 91 centimeters; brown (10YR 5/3) extremely gravelly coarse sandy loam, brown (10YR 4/3) moist; massive; soft, very friable, nonsticky and nonplastic; few very fine to very coarse roots throughout; few very fine to medium interstitial pores; 40 percent fine prominent irregular moderately cemented white (10YR 8/1) calcium carbonate nodules with sharp boundaries on bottom of rock fragments and 10 percent fine prominent irregular moderately cemented brownish yellow (10YR 6/6) opal with sharp boundaries on bottom of rock fragments; 75 percent gravel and 5 percent cobbles; strongly effervescent (80 percent calcium carbonate equivalent in the fine earth fraction); moderately alkaline (pH 8.0); clear wavy boundary. (36 to 51 centimeters thick)

2Bkq3--91 to 151 centimeters; light yellowish brown (2.5Y 6/3) extremely cobbly coarse sandy loam, olive brown (2.5Y 4/3) moist; massive; slightly hard, very friable, nonsticky and nonplastic; many very fine, common fine and medium tubular pores; 40 percent fine prominent irregular moderately cemented white (10YR 8/1) carbonate nodules with sharp boundaries on bottom of rock fragments and 10 percent fine prominent irregular moderately cemented brownish yellow (10YR 6/6) opal with sharp boundaries on bottom of rock fragments and 25 percent medium prominent irregular moderately cemented white (10YR 8/1) calcium carbonate nodules with sharp boundaries on bottom of rock fragments; 40 percent gravel, 25 percent cobbles, and 15 percent stones; strongly effervescent (80 percent calcium carbonate equivalent in the fine earth fraction); moderately alkaline (pH 8.0).

TYPE LOCATION: Clark County, Nevada; on the Toiyabe National Forest about 8 miles north and 27 miles west of Las Vegas; approximately 3.5 miles east and 1.6 miles north of Charleston Peak; about 1,500 feet north and 930 feet east of the southwest corner of section 18, T. 19 S., R. 57 E.; USGS Charleston Peak, NV 7.5 minute topographic quadrangle; latitude 36 degrees 17 minutes 41.70 seconds N. and longitude 115 degrees 37 minutes 55.60 seconds W.; UTM 11N, 622828e 4017526n; NAD83.

RANGE IN CHARACTERISTICS:

Soil moisture - usually moist in late winter and spring, and periodically moist in the upper part following summer thunderstorms: ustic soil moisture regime. These soils have saturated layers within 100 centimeters of the mineral soil surface during the spring from snow melt with 20 or more consecutive days, or 30 or more cumulative days in normal years.

Soil temperature: 6 to 8 degrees C.

Depth to calcic horizon: 10 to 23 centimeters.

Control section - Clay content averages: 4 to 10 percent.


Oi horizon (when present)
Bulk density: 0.3 to 0.7 g/cc.
Organic matter: 20 to 50 percent.


E horizon
Chroma: 2 or 4.
Consistence: Slightly hard or moderately hard.
Effervescence: Noneffervescent or very slightly effervescent.
Calcium carbonate equivalent in the fine earth fraction: 0 to 10 percent.
Organic matter: 1 to 3 percent.


2Bhkq horizon (when present)
Organic matter: 3 to 7 percent.
Calcium carbonate equivalent in the fine earth fraction: 40 to 75 percent.


2Bqk1 horizons
Value: 2 or 3 moist.
Chroma: 1 through 3.
Texture: Coarse sandy loam or sandy loam.
Structure: Weak or moderate.
Consistence: Soft or slightly hard.
Rock fragments: 60 to 80 percent; 50 to 80 percent gravel and 0 to 10 percent cobbles and stones.
Effervescence: Very slightly effervescent to strongly effervescent.
Reaction: Slightly alkaline or moderately alkaline.
Calcium carbonate equivalent in the fine earth fraction: 50 to 85 percent.
Organic matter: 1 to 3 percent.


2Bqk2 horizons
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 through 3.
Texture: Coarse sandy loam or sandy loam.
Structure: Weak or moderate.
Consistence: Soft or slightly hard.
Rock fragments: 60 to 90 percent; 50 to 80 percent gravel and 0 to 20 percent cobbles and stones.
Effervescence: Very slightly effervescent to strongly effervescent.
Reaction: Slightly alkaline or moderately alkaline.
Calcium carbonate equivalent in the fine earth fraction: 50 to 85 percent.
Organic matter: 0.5 to 1 percent.


2Bqk3 horizon
Texture: Coarse sandy loam or sandy loam.
Rock fragments: 60 to 90 percent; 30 to 50 percent gravel and 25 to 45 percent cobbles and stones.
Effervescence: Strongly effervescent or violently effervescent.
Calcium carbonate equivalent in the fine earth fraction: 50 to 85 percent.
Organic matter: 0.5 to 1 percent.

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Ladyofsnow soils are on upper backslopes of mountains. Slope ranges from 30 to 75 percent. These soils formed in colluvium derived from limestone and dolomite. Elevations are 2743 to 3292 meters. The climate is sub-humid continental, cool, with moist winters and common summer thundershowers. The mean annual precipitation is 500 to 610 millimeters, the mean annual air temperature is 3 to 6 degrees C., and the frost-free period is 50 to 90 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are Mountmummy and Robbersfire soils. Mountmummy soils are moderately deep to bedrock. Robbersfire soils are deep to bedrock and do not have a mollic epipedon.

DRAINAGE AND PERMEABILITY: Well drained; high runoff; moderately rapid permeability (high saturated hydraulic conductivity).

USE AND VEGETATION: Ladyofsnow soils are used for rangeland and wildlife habitat. The present vegetation is mainly Rocky Mountain bristlecone pine and currant.

DISTRIBUTION AND EXTENT: Mojave desert of southern Nevada. MLRA 30. These soils are not extensive with about 3,590 acres of the series mapped to date.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA

SERIES ESTABLISHED: Clark County Area, Nevada, 2006. Proposed in Clark County, Nevada; Clark County Soil Survey, 2004. The name is from Lady of Snows Camp located in the Spring Mountains.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon - The zone from the soil surface to 19 centimeters (Oi and E horizons).

Calcic horizon - The zone from 19 to 151 centimeters (2Bhkq, 2Bkq1, 2Bkq2, and 2Bkq3 horizons).

Particle-size control section - The zone from 25 to 100 centimeters (2Bkq1 and 2Bkq2 horizons and parts of the 2Bhkq and 2Bkq3 horizons).

ADDITIONAL DATA: The typical pedon at the series type location has full characterization data by the Soil Survey Laboratory (SSL), Lincoln, NE, as pedon ID S04NV-003-006 (pedon # 05N0124).

Responsibility for this series was transferred from Davis to Phoenix 9/2015. The last revision to the series was 7/2008. ET

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National Cooperative Soil Survey
U.S.A.