LOCATION GARNET AZ
Established Series
Rev. WJ/RKS/DWD/HCD
04/2015
GARNET SERIES
The Garnet series consists of very deep, well drained soils that formed in alluvium derived from igneous and metamorphic rock. Garnet soils are on fan terraces and have slopes of 2 to 6 percent. The mean annual precipitation is about 11 inches and the mean annual air temperature is about 62 degrees F.
TAXONOMIC CLASS: Fine-loamy over sandy or sandy-skeletal, mixed, superactive, thermic Typic Haplargids
TYPICAL PEDON: Garnet gravelly sandy loam, rangeland and wildlife habitat. (Colors are for dry soil unless otherwise noted.)
A--0 to 2 inches; yellowish brown (10YR 5/4) gravelly sandy loam, brown (10YR 4/3) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine roots; many fine tubular pores; 15 percent gravel; noneffervescent; slightly alkaline (pH 7.6); abrupt smooth boundary. (1 to 3 inches thick)
Bw--2 to 7 inches; brown (7.5YR 5/4) sandy loam, brown (7.5YR 4/3) moist; weak fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common very fine roots; few fine tubular pores; 5 percent gravel; noneffervescent; slightly alkaline (pH 7.8); clear wavy boundary. (0 to 6 inches thick)
Bt1--7 to 11 inches; brown (7.5YR 5/4) sandy clay loam, brown (7.5YR 4/3) moist; moderate fine subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few very fine roots; few fine tubular pores; few faint clay films lining pores and on faces of peds; 5 percent gravel; noneffervescent; slightly alkaline (pH 7.8); clear wavy boundary.
Bt2--11 to 20 inches; strong brown (7.5YR 5/6) sandy clay loam, brown (7.5YR 4/3) moist; moderate fine subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few very fine roots; few fine tubular pores; few faint clay films lining pores and on faces of peds; 10 percent gravel; noneffervescent; moderately alkaline (pH 8.0); clear wavy boundary.
Bt3--20 to 23 inches; strong brown (7.5YR 5/6) very gravelly sandy clay loam, brown (7.5YR 4/3) moist; moderate fine subangular blocky structure; very hard, firm, slightly sticky and slightly plastic; few very fine roots; few fine tubular pores; few faint clay films lining pores and on faces of peds; 40 percent gravel; noneffervescent; moderately alkaline (pH 8.0); clear wavy boundary. (The combined thickness of the Bt horizons is 10 to 20 inches)
2C1--23 to 30 inches; brown (7.5YR 5/3) extremely gravelly loamy sand, brown (7.5YR 4/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; few very fine roots; many fine interstitial pores; 80 percent gravel; noneffervescent; moderately alkaline (pH 8.0); clear wavy boundary.
2C2--30 to 60 inches; brown (7.5YR 5/3) extremely gravelly sand, brown (7.5YR 4/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; few very fine roots; many fine interstitial pores; 80 percent gravel; noneffervescent; moderately alkaline (pH 8.0); clear wavy boundary. (The combined thickness of the C horizons is 35 to 50 inches)
TYPE LOCATION: Mohave County, Arizona; 35 degrees, 28 minutes, 54 seconds north latitude and 114 degrees, 19 minutes, 24 seconds west longitude; about 1,700 feet north and 600 feet east of the southwest corner of section 29, T. 24 N., R. 19 W.
RANGE IN CHARACTERISTICS:
Soil moisture - Usually dry, moist in some part for short periods during winter and early spring and for less than 20 days cumulative between July to September following convection storms. Typic aridic soil moisture regime.
Soil temperature - 59 to 64 degrees F.
A horizon
Hue: 10YR, 7.5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 3 or 4, dry or moist
Bt horizons
Hue: 10YR, 7.5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 3 to 6, dry or moist
Texture: sandy clay loam, clay loam (20 to 35 percent clay)
Rock fragments: averages less than 35 percent
C horizons
Hue: 10YR, 7.5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 3 or 4, dry or moist
Texture: loamy sand, sand
Rock fragments: greater than 60 percent
The Bw horizon does not occur in all pedons.
COMPETING SERIES: There are no competing series at this time.
GEOGRAPHIC SETTING: Garnet soils are on fan terraces. These soils formed in alluvium from igneous and metamorphic rock. Slopes are 2 to 6 percent. Elevations are 2,900 to 3,200 feet. The mean annual precipitation is 9 to 12 inches, mean annual temperature is 57 to 62 degrees F., and the frost-free period is 200 to 300 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Dutchflat soils. Dutchflat soils are fine-loamy.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderately slow over rapid permeability.
USE AND VEGETATION: Livestock grazing and wildlife habitat. The present vegetation is mainly big galleta, black grama, bush muhly.
DISTRIBUTION AND EXTENT: Western Arizona. MLRA is 30. These soils are of limited extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA
SERIES ESTABLISHED: Soil Survey of Mohave County, Arizona, Central Part, 2005.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to a depth of 2 inches (A horizon).
Argillic horizon - The zone from 7 to 23 inches (Bt1, Bt2, and Bt3 horizons).
Lithologic discontinuity - The boundary at 23 inches.
Particle-size control section The zone from 7 to 40 inches (Bt and part of 2C horizons).
A strongly contrasting particle-size class is within a depth of 40 inches.
Classified according to Keys to Soil Taxonomy Ninth Edition, 2003.
Responsibility for this series was transferred from Davis to Phoenix 4/2015. The last revision to the series was 1/2005. ET
National Cooperative Soil Survey
U.S.A.