LOCATION GARYWASH                CA

Established Series
Rev: LJL/ET
12/2015

GARYWASH SERIES

The Garywash series consists of very deep, well drained soils that formed in alluvium from granite. Garywash soils are on fan remnants and slopes range from 2 to 15 percent. The mean annual precipitation is about 100 millimeters (about 4 inches) and the mean annual air temperature is about 24 degrees C (about 75 degrees F).

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, hyperthermic Typic Haplocalcids

TYPICAL PEDON: Garywash gravelly fine sandy loam on a northwest-facing, smooth, 9 percent slope at an elevation of 359 meters (about 1175 feet). (Colors are for dry soil unless otherwise noted.) The surface is covered by approximately 95 percent gravel.

A--0 to 2 centimeters (0 to 1 inch); pale brown (10YR6/3) gravelly fine sandy loam, dark yellowish brown (10YR 4/4) moist; moderate medium and thick platy structure; moderately hard, very friable, slightly sticky and nonplastic; many very fine vesicular pores and common fine tubular; 34 percent gravel; strongly effervescent (16 percent calcium carbonate equivalence in the fine earth fraction); electrical conductivity 0.5 dS/m; moderately alkaline (pH 8.2); very abrupt smooth boundary. (2 to 4 centimeters thick)

Btkqy--2 to 13 centimeters (1 to 5 inches); light yellowish brown (10YR6/4) gravelly fine sandy loam, dark yellowish brown (10YR 4/4) moist; moderate coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots; common very and fine tubular pores; 10 percent fine, brown (7.5YR 5/4) clay bridging sand grains and on ped faces; 3 percent, 1 to 5 millimeter, distinct, irregular, white (10YR 8/1), calcium carbonate masses, in matrix around concentrations with clear boundaries and 70 percent, distinct, white (10YR 8/1), calcium carbonate and silica films on bottom of rock fragments; 1 percent, less than 1 millimeter, white (10YR 8/1), gypsum masses, in matrix around concentrations; 25 percent gravel; violently effervescent (11 percent calcium carbonate equivalence in the fine earth fraction); electrical conductivity 0.1 dS/m; moderately alkaline (pH 8.2); abrupt wavy boundary. (7 to 20 centimeters thick)

Bkqy--13 to 55 centimeters (5 to 22 inches); light yellowish brown (10YR6/4) very gravelly fine sandy loam, dark yellowish brown (10YR 4/4) moist; weak medium subangular blocky structure; moderately hard, friable, slightly sticky and slightly plastic; few very fine roots; common very and fine tubular pores; 25 percent, 2 to 20 millimeter, distinct, irregular, white (10YR 8/1), calcium carbonate masses, in matrix around concentrations with clear boundaries and 80 percent, distinct, white (10YR 8/1), calcium carbonate and silica films on bottom of rock fragments; 1 percent, less than 1 millimeter, white (10YR 8/1), gypsum masses, in matrix around concentrations; 45 percent gravel; violently effervescent (17 percent calcium carbonate equivalence in the fine earth fraction); electrical conductivity 11 dS/m; moderately alkaline (pH 8.2); clear wavy boundary. (37 to 75 centimeters thick)

Bkq1--55 to 117 centimeters) (22 to 46 inches); pale brown (10YR6/3) fine sandy loam, yellowish brown (10YR 5/4) moist; moderate coarse subangular blocky structure; hard, very friable, slightly sticky and slightly plastic; many very fine and common fine tubular pores; 3 percent, 1 to 5 millimeter, distinct, irregular, white (10YR 8/1), calcium carbonate masses in matrix around concentrations with clear boundaries; 70 percent, distinct, less than 1 millimeter, white (10YR 8/1), calcium carbonate and silica films on bottom of rock fragments; 10 percent gravel; violently effervescent (13 percent calcium carbonate equivalence in the fine earth fraction); electrical conductivity 16 dS/m; moderately alkaline (pH 8.2); clear wavy boundary.

Bkq2--117 to 152 centimeters (46 to 60 inches); light yellowish brown (10YR6/4) fine sandy loam, dark yellowish brown (10YR 4/4) moist; weak coarse subangular blocky structure; hard, very friable, nonsticky and nonplastic; 3 percent, 1 to 5 millimeter, distinct, irregular, white (10YR 8/1) calcium carbonate masses, in matrix around concentrations with clear boundaries; 70 percent, distinct, white (10YR 8/1), calcium carbonate and silica films on bottom of rock fragments; 10 percent gravel; violently effervescent (11 percent calcium carbonate equivalence in the fine earth fraction); electrical conductivity 10 dS/m; moderately alkaline (pH 8.2). (Combined thickness of the Bkq horizons is 75 to 125 centimeters.)

TYPE LOCATION: San Bernardino County, California; about 32 miles south of Needles, California; approximately 1.4 miles east and 10 mile north of Pyramid Butte located on the south side of Chemehuevi Valley; 600 feet north and 950 feet west of the southeast corner of section 31, T. 4 N., R. 23 E.; 34 degrees, 23 minutes, 05.3 seconds north latitude and 114 degrees, 35 minutes, 56.4 seconds west longitude; USGS Savahia Peak NE, CA. 7.5 minute quadrangle; UTM 11S 0720746e 3807435n (DATUM: NAD83).

RANGE IN CHARACTERISTICS:

Soil moisture control section: usually dry throughout, rarely moist in some part during summer or winter. The soils have a typic-aridic soil moisture regime.

Soil temperature: 22 to 26.7 degrees C (about 72 to 80 degrees F).

Depth to calcic horizon: 10 to 25 centimeters

Organic matter: 0 to 0.5 percent

Control section -
Rock fragments: averages 15 to 35 percent, mainly gravel
Clay content: 6 to 15 percent

A horizon
Value: 6 or 7 dry
Structure: Weak through strong
Consistence: Slightly hard or moderately hard, nonsticky or slightly sticky, nonplastic or slightly plastic
Rock fragments: 0 to 34 percent
Effervescence: Strongly or violently effervescent
Calcium carbonate equivalence of the fine earth: 5 to 20 percent
Electrical conductivity: 0 to 2 dS/m

Btkqy or Btkq horizon
Hue: 7.5YR or 10YR
Value: 6 or 7 dry, 4 through 6 moist
Chroma: 3 or 4
Texture of the fine earth fraction: Fine sandy loam or sandy loam
Structure: Weak or moderate, medium or coarse
Consistence: Soft or slightly hard, nonsticky or slightly sticky
Rock fragments: 0 to 50 percent gravel, 0 to 5 percent cobbles
Calcium carbonate equivalence of the fine earth: 5 to 15 percent
Gypsum: 0 to 1 percent
Electrical conductivity: 0 to 2 dS/m
Note: Some pedons lack horizons containing clay films.

Bkqy or Bkq horizon
Hue: 7.5YR or 10YR
Value: 6 through 8 dry, 4 through 6 moist
Chroma: 3 or 4
Texture of the fine earth fraction: Fine sandy loam or loam
Structure: Weak or moderate, medium or coarse, subangular blocky structure or massive
Consistence: Soft through hard, very friable or friable, nonsticky or slightly sticky, nonplastic or slightly plastic
Rock fragments: 0 to 60 percent gravel, 0 to 5 percent cobbles
Effervescence: Strongly or violently effervescent
Reaction: Moderately or strongly alkaline
Calcium carbonate equivalence of the fine earth: 15 to 25 percent in the upper part and less than 15 percent in the lower part.
Gypsum: 0 to 1 percent in the upper part and no visible gypsum in the lower part
Electrical conductivity: 8 to 16 dS/m.
Other features: 5 to 40 percent secondary calcium carbonate masses in the upper part and 1 to 4 percent secondary calcium carbonate masses. Some pedons have 5 to 20 percent clay films on peds in the upper part, but not enough clay content for an argillic horizon.

COMPETING SERIES: These are the Aco(CA), Coolidge(AZ), Laveen(AZ), Rillito(AZ) and Toltec(AZ) series. Coolidge, Laveen, Rillito and Toltec soils are intermittently moist in some part of the the soil moisture control section during July through September. Aco soils have fine sand below 45 to 65 inches and have 1 to 20 percent gravel. Coolidge and Laveen soils average 0 to 15 percent gravel in the control section. Coolidge soils are 14 to 40 inches deep to the top of the calcic horizon. Toltec soils have a calcic horizon that consists of a disintegrated hardpan.

GEOGRAPHIC SETTING: Garywash soils are on fan remnants. Slopes range from 2 to 15 percent. These soils formed in alluvium from granite. Elevations are 300 to 450 meters (about 980 to 1475 feet). The climate is arid with hot, dry summers and warm, dry winters. The mean annual precipitation is 75 to 125 millimeters (about 3 to 5 inches); mean annual air temperature is 21 to 25 degrees C (about 70 to 77 degrees F), and the frost-free season is 320 to 365 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are Chemehueviand Snaggletooth soils. Chemehuevi soils have loamy-skeletal particle-size control section. Snaggletooth soils have fine-loamy particle-size control section and an argillic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; low runoff; high saturated hydraulic conductivity.

USE AND VEGETATION: Garywash soils are used for recreational and wildlife habitat. The present vegetation is mainly creosote bush.

DISTRIBUTION AND EXTENT: Lower Colorado Desert of southeastern California, U.S.A.; MLRA 31. These soils are of small extent.

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

SERIES ESTABLISHED: San Bernardino County, California, Chemehuevi Wash OHV Area, Part of the Colorado Desert Area, 2005. The name is from Gary Wash located 1.5 miles to the west-northwest in Chemehuevi Valley.

REMARKS: Diagnostic horizons and features in this pedon include:

Ochric epipedon: from a depth of 0 to 13 centimeters (0 to 5 inches) (A and Btkqy horizons).
Calcic horizon: from a depth of 13 to 55 centimeters (5 to 22 inches) (Bkqy horizon).
Particle-size control section: from a depth of 25 to 100 centimeters (10 to 40 inches) (Part of Bkqy and Bkq1 horizons).

ADDITIONAL DATA: NASIS User Pedon ID: 6799-16-1LL.

Responsibility for this series was transferred from Davis to Phoenix 12/2015. The last revision to the series was 6/2012. ET

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National Cooperative Soil Survey
U.S.A.