LOCATION EASTRANGE CA
Established Series
REV: LA/PBF/ET
04/2015
EASTRANGE SERIES
The Eastrange series consists of very deep, somewhat excessively drained soils formed in mixed alluvium. Eastrange soils are on fan remnants. Slope ranges from 4 to 50 percent. The mean annual precipitation is about 5 inches and the mean annual air temperature is about 66 degrees F.
TAXONOMIC CLASS: Sandy-skeletal, mixed, thermic Sodic Haplocalcids
TYPICAL PEDON: On Eastrange-Dime association, 8 to 50 percent slopes at an elevation of 2,280 feet. (Colors are for dry soil unless otherwise noted. When described on February 7, 1996, the soil was dry throughout.) The soil surface is partially covered with 50 percent gravel.
A -- 0 to 2 inches; very pale brown (10YR 7/3) very gravelly sandy loam, brown (10YR 4/3) moist; moderate very thick platy and moderate fine and medium subangular blocky structure; moderately hard, very friable, slightly sticky and slightly plastic; few very fine and fine roots; common very fine, few fine vesicular and few very fine and fine interstitial pores; violently effervescent; 50 percent gravel; strongly alkaline (pH 8.6); abrupt wavy boundary. (1 to 3 inches thick)
Bkn1 -- 2 to 10 inches; very pale brown (10YR 8/3) stratified very gravelly loamy coarse sand and very gravelly coarse sand, light yellowish brown (10YR 6/4) moist; soft to hard, very friable or friable, nonsticky and nonplastic; few very fine, fine and medium roots; common very fine and few fine interstitial pores; electrical conductivity of 1 dS/m, sodium adsorption ratio of 5; many prominent lime coats on undersides of rock fragments, 40 percent carbonate threads throughout; violently effervescent; 50 percent gravel and trace of cobbles; strongly alkaline (pH 8.7); abrupt wavy boundary.
Bkn2 -- 10 to 20 inches; very pale brown (10YR 8/3) stratified very gravelly loamy coarse sand and very gravelly coarse sand, light yellowish brown (10YR 6/4) moist; soft to hard, very friable or friable, nonsticky and nonplastic; few very fine, fine and medium roots; common very fine and few fine interstitial pores; electrical conductivity of 2 dS/m, sodium adsorption ratio of 10; many prominent lime coats on undersides of rock fragments, 40 percent carbonate threads throughout; violently effervescent; 50 percent gravel and trace of cobbles; strongly alkaline (pH 8.7); abrupt wavy boundary. (Combined thickness of the Bkn1 and Bkn2 horizons is 6 to 27 inches)
Bkn3 -- 20 to 26 inches; very pale brown (10YR 8/3) stratified very gravelly loamy coarse sand and very gravelly coarse sand, light yellowish brown (10YR 6/4) moist; soft to hard, very friable or friable, nonsticky and nonplastic; few very fine, fine and medium roots; common very fine and few fine interstitial pores; electrical conductivity of 4 dS/m, sodium adsorption ratio of 27; many prominent lime coats on undersides of rock fragments, 40 percent carbonate threads throughout; violently effervescent; 50 percent gravel and trace of cobbles; strongly alkaline (pH 8.7); abrupt wavy boundary.
Bkn4 -- 26 to 51 inches; very pale brown (10YR 7/3) stratified very gravelly loamy coarse sand to gravelly sand, yellowish brown (10YR 5/4) moist; soft to hard, very friable or friable, nonsticky and nonplastic; few very fine, fine, and medium roots; common very fine and fine interstitial pores; electrical conductivity of 9 dS/m, sodium adsorption ratio of 32; many prominent lime coats on undersides of rock fragments, many 1 to 4 inch (2 to 10 cm) thick bands of carbonate throughout; slightly to violently effervescent; 45 percent gravel and 2 percent cobbles; strongly alkaline (pH 8.7); clear wavy boundary.
Bkn5 -- 51 to 60 inches; very pale brown (10YR 7/3) very gravelly loamy sand, yellowish brown (10YR 5/6) moist; moderately hard, friable, nonsticky and nonplastic; few very fine roots; few very fine and fine interstitial pores; electrical conductivity of 6 dS/m, sodium adsorption ratio of 30; 40 percent carbonate threads throughout; violently effervescent; 55 percent gravel; strongly alkaline (pH 8.6).
TYPE LOCATION: San Bernardino County, California; about 1,500 feet north and 25 feet east of the southwest corner of sec. 29, T. 15 N., R. 6 E.; 35 degrees, 21 minutes, and 42 seconds north latitude, and 116 degrees, 22 minutes, and 27 seconds west longitude; Red Pass Lake 7.5 minute quadrangle. (UTM 11S, 0556871e 3913007n)
RANGE IN CHARACTERISTICS:
Soil moisture control section - usually dry, moist in some part for short periods during winter and early spring and for 10 to 20 days cumulative between July and October following convection storms. The soils have a Typic-Aridic moisture regime.
Soil temperature: 63 to 72 degrees F.
Control section -
Rock fragments: 35 to 75 percent, predominantly gravel;
Average is greater than 35 percent.
Clay content: 2 to 10 percent
Texture of the fine earth: stratified or nonstratified loamy sand, loamy coarse sand, or coarse sand
Depth to calcic horizon: 2 to 10 inches
Calcium carbonate equivalent: greater than 5 percent
Organic matter: 0 to 0.5 percent
Surface rock fragments: 50 to 75 percent gravel, 0 to 10 percent cobbles, and 0 to 1 percent stones.
A horizon
Hue: 7.5YR or 10YR
Value: 6 to 8 dry, 4 to 6 moist
Chroma: 3 or 4 moist
Texture of the fine earth: sandy loam or loam
Clay content: 8 to 12 percent
Rock fragments: 45 to 75 percent; with 45 to 70 percent
gravel, and 0 to 5 percent cobbles
Consistence: soft to moderately hard
Reaction: slightly to strongly alkaline
Calcium carbonate equivalent: 1 to 10 percent
Salinity: 0 to 4 dS/m
Sodium adsorption ratio: 0 to 5
Bkn1 and Bkn2 horizons
Hue: 7.5YR or 10YR
Value: 4 to 8 dry, 4 to 6 moist
Chroma: 3 to 6 dry, 4 to 8 moist
Texture of the fine earth: coarse sand, sand, loamy sand,
loamy coarse sand, or sandy loam
Clay content: 2 to 10 percent
Rock fragments: 30 to 65 percent; with 25 to 65 percent
gravel, and 0 to 5 percent cobbles
Reaction: moderately or strongly alkaline
Salinity: 1 to 4 dS/m
Sodium adsorption ratio: 2 to 12
Calcium carbonate equivalent: 5 to 25 percent
Bkn3, Bkn4, and Bkn5 horizons
Hue: 7.5YR or 10YR
Value: 4 to 8 dry, 4 to 6 moist
Chroma: 3 to 6 dry, 4 to 8 moist
Texture of the fine earth: coarse sand, sand, loamy sand,
or loamy coarse sand
Clay content: 2 to 10 percent
Rock fragments: 30 to 65 percent; with 25 to 65 percent
gravel, 0 to 5 percent cobbles and 0 to 5 percent stones
Reaction: moderately or strongly alkaline
Salinity: 4 to 16 dS/m
Sodium adsorption ratio: 13 to 50
Calcium carbonate equivalent: 10 to 25 percent
Other features: 5 to 50 percent secondary lime
accumulation as multiple bands and seams throughout and
coats on undersides of coarse fragments. Some pedons may
also have up to 10 percent durinodes or duripan fragments.
COMPETING SERIES: There are no competing series at this time.
GEOGRAPHIC SETTING: The Eastrange soils are on fan remnants. Slopes range from 4 to 50 percent. The soils formed in mixed alluvium. Elevations are from 1,900 to 3,600 feet. The climate is arid with hot, dry summers and warm moist winters. Most precipitation comes in the winter but a significant portion is received between July and September following convection storms. The mean annual precipitation is 2 to 7 inches. The mean annual air temperature is 61 to 70 degrees F. The frost-free season is 200 to 340 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Arizo,
Dime,
Fortirwin,
Owlshead, and
Crackerjack soils. Arizo soils are on alluvial fans and on inset fans, and do not have a calcic or sodic horizon. Dime soils have a loamy-skeletal particle size control section. Fortirwin soils have a loamy particle-size control section and are shallow to an indurated duripan. Owlshead and Crackerjack soils have loamy-skeletal and loamy particle-size control sections, respectively, and are shallow to a cambidic duripan.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; very low to medium runoff; moderate over rapid or very rapid permeability.
USE AND VEGETATION: Eastrange soils are used for military exercises and wildlife habitat. The present vegetation is mainly creosotebush, white bursage, desert senna, and fluffgrass.
DISTRIBUTION AND EXTENT: Mojave Desert of southeastern California. MLRA 30. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA
SERIES ESTABLISHED: San Bernardino County, California, Fort Irwin Soil Survey Area, 2000. The name is coined.
REMARKS: Diagnostic horizons and features recognized in the profile are:
1. Ochric epipedon -- 0 to 2 inches (A horizon)
2. Calcic horizon -- 2 to 60 inches (Bkn1, Bkn2, and Bkn3
horizons)
3. Sodic horizon - 20 to 60 inches (Bkn3, Bkn4, and Bkn5 horizons)
4. Particle-size control section -- 10 to 40 inches (parts
of the Bkn2, Bkn3, and Bkn4 horizons)
Responsibility for this series was transferred from Davis to Phoenix 4/2015. The last revision to the series was 5/2000. ET
National Cooperative Soil Survey
U.S.A.