LOCATION GARLOCK CA
Established Series
Rev. HLH/RWK/SBS/ET
04/2015
GARLOCK SERIES
The Garlock series consists of very deep, well drained soils that formed from mixed alluvium. Garlock soils are on old stream terraces and alluvial fans in the Mojave Desert and have slopes of 2 to 9 percent. The mean annual precipitation is about 6 inches, some in the form of snow, and the mean annual air temperature is about 63 degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Typic Haplargids
TYPICAL PEDON: Garlock loamy sand, rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 3 inches; yellowish brown (10YR 5/4) loamy sand, dark yellowish brown (10YR 4/4) moist; massive; soft, very friable, nonsticky and nonplastic; common very fine roots; common very fine interstitial pores; about 2 percent 2mm to 5mm gravel; moderately alkaline (pH 8.0), clear smooth boundary (2 to 18 inches thick)
AB--3 to 9 inches; brown (7.5YR 5/4) sandy loam, brown (7.5YR 5/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; few very fine roots; common very fine tubular pores; few thin clay films bridging mineral grains; about 2 percent 2mm to 5mm gravel; moderately alkaline (pH 8.0); abrupt wavy boundary. (4 to 6 inches thick)
Bt1--9 to 12 inches; strong brown (7.5YR 5/6) sandy loam, dark brown (7.5YR 4/4) moist; moderate medium angular blocky structure; hard, friable, sticky and plastic; few very fine roots; common medium and fine tubular and very fine interstitial pores; few thin clay films bridging mineral grains and on faces of peds; moderately alkaline (pH 8.0); clear wavy boundary. (3 to 6 inches thick)
Bt2--12 to 24 inches; brown (7.5YR 5/4) sandy clay loam, dark brown (7.5YR 4/4) moist; strong coarse prismatic structure; hard, firm, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; common thin clay films bridging mineral grains and many moderately thick clay films on faces of peds; 5 percent 2mm to 5mm gravel; moderately alkaline (pH 8.0); abrupt wavy boundary. (10 to 30 inches thick)
Bt3--24 to 33 inches; brown (7.5YR 5/4) sandy loam, dark brown (7.5YR 4/4) moist; massive; hard, friable, nonsticky and slightly plastic; few fine roots; common thin clay films bridging mineral grains, 5 percent 2mm to 5mm gravel by volume; slightly alkaline (pH 7.5); abrupt wavy boundary. (6 to 30 inches thick)
C1--33 to 42 inches; brown (7.5YR 5/4) gravelly loamy sand, dark brown (7.5YR 4/4) moist; massive; hard, friable, nonsticky and nonplastic; few thin clay films bridging mineral grains; 20 percent 2mm to 2cm gravel; moderately alkaline (pH 8.0); clear wavy boundary. (0 to 11 inches thick)
C2--42 to 51 inches; yellowish brown (10YR 5/6) gravelly loamy coarse sand, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, friable, nonsticky and nonplastic; few fine roots; many fine interstitial pores; few very thin clay films bridging mineral grains; 34 percent 2mm to 4cm gravel; slightly alkaline (pH 7.5); abrupt smooth boundary. (0 to 15 inches thick)
2Ck--51 to 60 inches; light yellowish brown (10YR 6/4) very gravelly loamy sand, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, friable, nonsticky and nonplastic; few fine roots; strongly effervescent with lime coating gravel; 55 percent 2mm to 4cm gravel; moderately alkaline (pH 8.0).
TYPE LOCATION: Kern County, California; in the Mojave Desert along the "Old Twenty Mule Team Road", approximately 1-1/4 miles east of the east boundary fence of the Mojave Airport, approximately 1,300 feet southwest of the center of section 1, T.11N., R.12W, SBB and M.
RANGE IN CHARACTERISTICS: The soil between the depths of 12 and 24 inches is dry from mid May until the end of November. Mean annual soil temperature is 63 degrees to 72 degrees F. Reaction ranges from neutral to moderately alkaline throughout. Lime occurs below a depth of 40 inches in some pedons. Clay content in the control section averages 20 to 35 percent.
The A horizon is grayish brown, brown, yellowish brown light yellowish brown or light brown (10YR 5/2, 5/3, 5/4, 5/6, 6/3, 6/4, 6/6; 7.5YR 5/2, 5/4, 6/4). It is sand, coarse sand, loamy sand, coarse sandy loam or sandy loam and has 0 to 15 percent rock fragments by volume. It is usually massive but the surface inch or two has weak platy or fine granular structure in some pedons.
The AB or Bt1 horizon is brown, yellowish brown, strong brown, light yellowish brown or light brown (10YR 5/3, 5/4, 5/6, 6/4, 6/6; 7.5YR 5/2, 5/4, 5/6, 6/4, 6/6). It is coarse sandy loam, sandy loam, sandy clay loam, gravelly coarse sandy loam, gravelly sandy loam, or gravelly sandy clay loam, and has 12 to 35 percent clay and 0 to 30 percent rock fragments ranging from 2mm to 5mm in diameter.
The Bt2 horizon is brown, yellow, strong brown, or reddish yellow (10YR 5/3, 5/4, 5/6, 6/6, 7/6; 7.5YR 5/2, 5/4, 5/6, 5/8, 6/6, 6/8). It is sandy clay loam or gravelly sandy clay loam and has 22 to 35 percent clay and 0 to 30 percent gravel. A few pedons have thin horizons with 35 to 50 percent clay.
The Bt3 horizon is brown, yellow, yellowish brown, strong brown or reddish yellow (10YR 5/3, 5/4, 5/6, 6/6, 7/6; 7.5YR 5/2, 5/4, 5/6, 5/8, 6/6, 6/8). It is coarse sandy loam, sandy loam or gravelly sandy loam and has 0 to 30 percent gravel by volume.
The C horizon is brown, yellowish brown, brownish yellow, yellow, strong brown, or reddish yellow (10YR 5/3, 5/4, 5/6, 5/8, 6/6, 7/6, 7/8; 7.5YR 5/4, 5/6, 5/8, 6/6, 6/8). It is loamy sand, loamy coarse sand or coarse sand with gravelly and very gravelly equivalents of each and has 0 to 35 percent gravel. Unrelated gravelly and cobbly stratifications and silty substratums occur below depth of 40 inches in some pedons. Rock fragments have lime coatings.
COMPETING SERIES: These are the
Anway,
Avenal,
Berino,
Bryman,
Bucklebar,
Cornville,
Dutchflat,
Hap,
Hi Vista,
Lanip,
Madurez,
Milham,
Neuralia,
Palomas,
Poachie and
Tres Hermanos series. Anway soils have solums less than 20 inches thick. Berino, Cornville, Hap, Madurez and Tres Hermanos soils have calcic horizons. Bryman soils have hues of 5YR and are calcareous within 40 inches. Bucklebar and Palomas soils have hues of 5YR through 2.5YR in the B2t horizon. Avenal, Dutchflat, Milham and Neuralia soils are calcareous in the Bt horizon. Hi Vista soils have a lithic contact at 20 to 40 inches. Lanip and Poachie soils are calcareous within 40 inches and the moisture control section is intermitantly moist for 10 to 20 days cumulative within July to September.
GEOGRAPHIC SETTING: Garlock soils are on old alluvial fans and stream terraces at elevations of 2,100 to 3,500 feet. The climate is aridic with hot, dry summers and mild, moist winters. The annual precipitation ranges from 3 to 8 inches, some as snow in the higher elevations, most falling in winter. The average January temperature is about 45 degrees F. and the average July temperature is about 88 degrees F. The mean annual temperature is about 62 degrees F. The frost-free season is 200 to 340 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing
Neuralia soils and the
Adelanto soils. Adelanto soils have weakly developed Bt horizons with less than 18 percent clay.
DRAINAGE AND PERMEABILITY: Well drained; low to medium runoff; moderately slow over very rapid permeability.
USE AND VEGETATION: Used for range with annual sheep grazing, wildlife and recreation. Vegetation is mainly creosotebush, bursage and other shrubs, filaree, buckwheat, desert needlegrass, Indian ricegrass and annual grasses.
DISTRIBUTION AND EXTENT: In the high desert portion of the Mojave Desert of California. Series is extensive in MLRA 30.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA
SERIES ESTABLISHED: Kern County California 1976.
REMARKS: The soil as described by C. C. Nikiforoff, was named Mohave series. The current concept of the Mohave series requires a calcic horizon.
OSED scanned by SSQA. Last revised by state on 9/97. CEC activity class supported by lab data. Series competed at that time. Responsibility for this series was transferred from Davis to Phoenix 4/2015. ET
National Cooperative Soil Survey
U.S.A.