LOCATION ROXIE                   CA

Established Series
GMW/SMR/LJL/CAH
02/2025

ROXIE SERIES

The Roxie series consists of moderately deep to bedrock, well drained soils that formed in colluvium and residuum weathered from metamorphic rock. The Roxie soils are on hills and mountains. Slopes range from 15 to 50 percent. The mean annual precipitation is about 175 mm, and the mean annual temperature is about 15 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, thermic Typic Haplargids

TYPICAL PEDON: Roxie gravelly sandy loam, on a northeast facing, 25 percent slope under rangeland at an elevation of 1248 meters. (Colors are for dry soils unless otherwise noted. 1/9/2013 actual site observation date.) The soil surface is covered by approximately 20 percent fine gravel, 40 percent medium and coarse gravel, 5 percent cobbles.

A--0 to 3 cm (0 to 1 inches); olive brown (2.5Y 4/4) gravelly sandy loam, dark olive brown (2.5Y 3/3), moist; weak thick platy structure; soft, very friable, slightly sticky and nonplastic; common very fine roots throughout; common very fine irregular pores; 10 percent fine gravel, 20 percent medium and coarse gravel; neutral (pH 6.9); clear wavy boundary. (2 to 7 cm thick)

Bt1--3 to 12 cm (1 to 5 inches); dark yellowish brown (10YR 4/4) very gravelly sandy loam, dark yellowish brown (10YR 3/4), moist; moderate medium subangular blocky structure; moderately hard, very friable, slightly sticky and slightly plastic; common fine roots throughout and common very fine roots throughout; common fine irregular and common very fine irregular pores; 15 percent faint dark yellowish brown (10YR 4/4) clay bridges between sand grains and 50 percent faint dark yellowish brown (10YR 4/4) clay films on rock fragments; 10 percent fine gravel, 35 percent medium and coarse gravel; moderately alkaline (pH 7.9); clear wavy boundary.

Bt2--12 to 27 cm (5 to 11 inches); dark yellowish brown (10YR 4/4) extremely gravelly sandy loam, dark yellowish brown (10YR 3/4), moist; massive; moderately hard, friable, nonsticky and nonplastic; common fine roots throughout and common very fine roots throughout; common fine irregular and common very fine irregular pores; 80 percent distinct brown (10YR 4/3) clay films on rock fragments; 18 percent fine gravel, 47 percent medium and coarse gravel; slightly alkaline (pH 7.7); clear smooth boundary. (Combined thickness of Bt horizons is 25 to 40 centimeters, 10 to 16 inches thick.)

BCt--27 to 65 cm (11 to 26 inches); dark yellowish brown (10YR 4/4) extremely gravelly loamy coarse sand, brown (10YR 4/3), moist; massive; moderately hard, friable, nonsticky and nonplastic; few very fine roots in cracks; common fine irregular pores; 20 percent faint dark yellowish brown (10YR 4/4) clay films on rock fragments; 10 percent fine gravel, 60 percent medium and coarse gravel; strongly alkaline (pH 8.5); abrupt smooth boundary. (20 to 50 cm thick)

Cr--65 to 90 cm (26 to 35 inches); weakly coherent gneiss bedrock (fractures 10 to <45 cm apart); massive; weakly coherent.

TYPE LOCATION: San Bernardino County, California; about 11 miles north of Goffs, CA, located in the Vontrigger Hills; approximately 1,660 feet south and 2,330 feet east of the northwest corner of section 36, T. 12 N., R. 17 E., San Bernardino Baseline and Meridian; USGS Signal Hill, California 7.5 minute topographic quadrangle; 35 degrees, 4 minutes, 48.20 seconds north latitude and 115 degrees, 6 minutes, 6.30 seconds west longitude; UTM zone 11 673061e, 3883570n, NAD83.

RANGE IN CHARACTERISTICS:
Soil moisture: usually dry, moist in some part for short periods during winter and early spring and for 10 to 20 days cumulative between July and September following summer convection storms; typic aridic moisture regime.

Soil temperature: 15 to 19 degrees C
Depth to argillic horizon: 2 to 7 centimeters (1 to 3 inches)
Depth to the base of the argillic horizon: 25 to 50 centimeters (10 to 20 inches)
Depth to paralithic contact: 50 to 100 centimeters (20 to 40 inches)

Control section
Rock fragments: averages 35 to 75 percent
Clay content: averages 12 to 20 percent

A horizon
Hue: 2.5Y or 10YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 3 or 4 dry, 3 to 6 moist
Clay content: 8 to 15 percent
Rock fragments: 15 to 35 percent gravel
Reaction: neutral to slightly alkaline

Bt horizons
Hue: 2.5Y, 7.5YR or 10YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 2 to 6 dry or moist
Texture of the fine earth fraction: Sandy loam or sandy clay loam
Clay content: ranges 12 to 25 percent
Rock fragments: 15 to 75 percent indurated gravel with 0 to 10 percent paragravel
Reaction: slightly alkaline or moderately alkaline

BCt or Ct horizon
Hue: 2.5Y, 7.5YR or 10YR
Value: 4 or 5 dry
Chroma: 2 to 4 dry or moist
Texture of the fine earth fraction: Sand, loamy coarse sand, or loamy sand
Clay content: 2 to 8 percent
Rock fragments: 50 to 75 percent indurated gravel with 0 to 10 percent paragravel
Reaction: moderately alkaline or strongly alkaline

COMPETING SERIES: These are the Ashmed (NV), Bitter (CA), Blind (AZ), Bluebird (AZ), Highland (NV), Khyber (CA), Nellake (CA), Soledad (NM), Tiefort (CA), Timosea (CA), Topawa (AZ), Twobitter (CA), Werewolf (CA) and Yuccabutte (CA) series. Ashmed, Bitter, Blind, Bluebird, Khyber, Nellake, Soledad, Timosea, Topawa, Twobitter, Werewolf and Yuccabutte soils are all very deep soils and do not have a paralithic contact within 150 centimeters. Highland and Tiefort soils have a lithic contact between 75 to 100 and 50 to 75 centimeters respectively and formed in volcanic parent materisl. Ashmed, Bitter, Blind, Bluebird, Highland, Kyber, Tiefort, Timosea, Topawa, and Yuccabutte soils have greater than 18 percent clay in the particle size control section. Nellake and Yuccabutte soils have MAST of 19 to 22 degrees C. Topawa soils have MAST of 20 to 22 degrees C.

GEOGRAPHIC SETTING: The Roxie soils are on hills and mountains. Slopes range from 15 to 50 percent. The soils formed in colluvium and residuum weathered from metamorphic rock. Elevation ranges from 1050 to 1600 meters. The mean annual precipitation is 150 to 200 mm. The mean annual temperature is about 13 to 17 degrees C. The frost-free period is 210 to 320 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Coppermine and Copperworld series. Coppermine soils are on backslopes of hills and mountains and is shallow to hard bedrock. Copperworld soils are on backslopes of hills and mountains, has a loamy control section, and is shallow to hard bedrock.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: well drained; high runoff; high saturated hydraulic conductivity above the bedrock and very low saturated hydraulic conductivity within the bedrock.

USE AND VEGETATION: Roxie soils are used for recreation and wildlife habitat. Native vegetation is California buckwheat, Cooper's goldenbush, Mojave yucca and white ratany.

DISTRIBUTION AND EXTENT: Mojave Basin and Range of California, U.S.A.; MLRA 30. The series is of small extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California.

SERIES PROPOSED: San Bernardino County, California, Soil Survey of Mojave National Preserve Area, California, 2023. The name is coined.

REMARKS: Diagnostic horizons and features in this pedon include:

Ochric epipedon - the zone from 0 to 3 cm. (A horizon)
Argillic horizon - the zone from 3 to 27 cm. (Bt1 and Bt2 horizons)
Paralithic contact - the zone from 65 to 90 cm. (Cr horizon)
Particle size control section - the zone from 3 to 27 cm. (Bt1 and Bt2 horizons)

ADDITIONAL DATA: NASIS User Site ID: 2013CA0712035.
Location was moved from 2013CA0712036 to 2013CA0712035 to better represent the series concept.

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National Cooperative Soil Survey
U.S.A.