LOCATION DEPRAVE                 CA

Established Series
Rev: PBF/CAH/ET
12/2015

DEPRAVE SERIES

The Deprave series consists of moderately deep, well drained soils that formed in alluvium from granitoid and/or gneissic rocks. Deprave soils are on fan remnants. Slopes range from 0 to 4 percent. The mean annual precipitation is about 75 millimeters (3 inches) and the mean annual air temperature is about 25 degrees C (77 degrees F).

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, hyperthermic Argidic Argidurids

TYPICAL PEDON: Deprave gravel, on an east-facing, linear, 2 percent slope under sparse desert shrubs at an elevation of 351 meters (1,151 feet). (Colors are for dry soil unless otherwise noted.)

C -- 0 to 4 centimeters (0 to 1.5 inches); gravel; with 20 percent fine gravel, 68 percent medium and coarse gravel, 9 percent cobbles and 1 percent stones; abrupt wavy boundary. (3 to 7 centimeters thick)

A -- 4 to 10 centimeters (1.5 to 4 inches); light yellowish brown (10YR 6/4) gravelly loam, dark yellowish brown (10YR 4/4) moist; strong very thick platy structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine, few fine and medium vesicular pores, and very few fine tubular pores; 10 percent fine gravel, 15 percent medium and coarse gravel and 5 percent cobbles; slightly effervescent; slightly alkaline (pH 7.6); abrupt wavy boundary. (2 to 8 centimeters thick)

Btk -- 10 to 39 centimeters (4 to 15 inches); yellowish red (5YR 4/6) very gravelly sandy clay loam, yellowish red (5YR 4/6) moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and moderately plastic; very few very fine interstitial pores; 15 percent prominent, strong brown (7.5YR 4/6) clay films on ped faces; 1 percent, fine, distinct, very pale brown (10YR 8/2) calcium carbonate masses on surfaces along root channels; 25 percent fine gravel, 20 percent medium and coarse gravel, 1 percent cobbles and 1 percent stones; very slightly effervescent; slightly alkaline (pH 7.6); gradual wavy boundary. (25 to 50 centimeters thick)

Bq1 -- 39 to 54 centimeters (15 to 21 inches); brown (7.5YR 4/4) very gravelly loamy sand, dark yellowish brown (10YR 4/4) moist; single grain; loose, nonsticky and nonplastic; 2 percent, distinct, light gray (10YR 7/2) silica coats on bottom of rock fragments; 20 percent fine gravel, 30 percent medium and coarse gravel and 1 percent cobbles; very slightly effervescent; slightly alkaline (pH 7.8); abrupt wavy boundary.

Bq2 -- 54 to 98 centimeters (21 to 38.5 inches); brown (10YR 5/3) very gravelly sand, brown (10YR 4/3) moist; single grain; loose, nonsticky and nonplastic; 20 percent, distinct, light gray (10YR 7/2) silica coats on bottom of rock fragments and 10 percent, fine, distinct, light gray (10YR 7/2) moderately cemented, irregular silica masses on bottom of rock fragments and 5 percent, medium, prominent, very pale brown (10YR 8/2) moderately cemented, irregular durinodes in the matrix; 10 percent fine gravel, 45 percent medium and coarse gravel and 1 percent cobbles; violently effervescent; moderately alkaline (pH 8.0); abrupt wavy boundary. (0 to 65 centimeters thick)

Bkqm1 -- 98 to 112 centimeters (38.5 to 44 inches); light gray (10YR 7/2) very weakly cemented very gravelly sand, brown (10YR 5/3) moist; duripan with 95 percent cementation; massive; hard, firm, nonsticky and nonplastic; 75 percent, distinct, white (10YR 8/1) calcium carbonate coats on rock fragments; 15 percent, coarse, distinct, light gray (10YR 7/2) moderately cemented, irregular silica masses on bottom of rock fragments and 5 percent, medium, prominent, very pale brown (10YR 8/2) moderately cemented, irregular durinodes in the matrix; 15 percent fine gravel, 40 percent medium and coarse gravel and 1 percent cobbles; violently effervescent; moderately alkaline (pH 8.4); abrupt wavy boundary.

Bkqm2 -- 112 to 136 centimeters (44 to 53 inches); pale brown (10YR 6/3) very weakly cemented gravelly sand, dark yellowish brown (10YR 4/6) moist; duripan with 95 percent cementation; massive; hard, firm, nonsticky and nonplastic; 60 percent, distinct, very pale brown (10YR 8/2) calcium carbonate coats on rock fragments; 10 percent, fine, distinct, light gray (10YR 7/2) moderately cemented, irregular silica masses on bottom of rock fragments and 10 percent, distinct, light gray (10YR 7/2) silica coats on bottom of rock fragments; 15 percent fine gravel, 10 percent medium and coarse gravel and 1 percent cobbles; violently effervescent; moderately alkaline (pH 8.4); gradual wavy boundary.

Bkqm3 -- 136 to 160 centimeters (53 to 63 inches); pale brown (10YR 6/3) extremely weakly cemented very gravelly coarse sand, brown (10YR 5/3) moist; duripan with 95 percent cementation; massive; very hard, firm, nonsticky and nonplastic; 60 percent, distinct, very pale brown (10YR 8/2) calcium carbonate coats on rock fragments; 4 percent, distinct, very pale brown (10YR 7/3) silica coats on bottom of rock fragments; 20 percent fine gravel, 30 percent medium and coarse gravel and 3 percent cobbles; strongly effervescent; moderately alkaline (pH 8.2).

TYPE LOCATION: Riverside County, California; approximately 840 meters (2,755 feet) north northeast of the junction of Eagle Mountain and MWD Agueduct Roads; 21 meters (70 feet) east and 736 meters (2,415 feet) north of the SW corner of section 36, T. 4 S., R. 14 E., San Bernardino Base and Meridian; 33 degrees, 46 minutes and 43.4 seconds north latitude and 115 degrees, 27 minutes and 36.1 seconds west longitude; USGS Victory Pass 7.5 minute topographic quadrangle; UTM 11S 0642587e 3738685n (DTM: NAD83).

RANGE IN CHARACTERISTICS:

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

Soil temperature: 25 to 28 degrees C (77 to 82 F).
Surface rock fragments: 90 to 100 percent, with 15 to 30 percent fine gravel,
40 to 80 percent medium and coarse gravel, 5 to 35 percent cobbles and 0
to 5 percent stones.

Control section -
Rock fragments: averages 35 to 60 percent, gravel, cobbles and stones.
Clay content: averages 18 to 25 percent.
Organic matter: 0 to 0.25 percent.
Depth to the upper boundary of an argillic horizon: 5 to 18 centimeters (2 to
7 inches).
Depth to the upper boundary of a duripan: 50 to 100 centimeters (20 to 39
centimeters).

C horizon
90 to 100 percent rock fragments; gravel, cobbles and stones.

A horizon
Hue: 7.5YR or 10YR.
Value: 6 or 7, dry and 3 or 4, moist.
Chroma: 3 or 4, dry or moist.
Clay content: 12 to 18 percent.
Rock fragments: 30 to 60 percent; with 20 to 35 percent gravel, 0 to 15
percent cobbles, and 0 to 5 percent stones.
Effervescence: slightly to violently effervescent.
Calcium carbonate equivalent: 0 to 5 percent.
Reaction: slightly or moderately alkaline.

Btk horizons
Hue: 5YR or 7.5YR.
Value: 4 or 5, dry.
Chroma: 4 to 6, moist.
Texture of the fine earth: coarse sandy loam, sandy loam or sandy clay
loam.
Clay content: 15 to 28 percent.
Rock fragments: 35 to 70 percent; with 25 to 45 percent gravel, 0 to 15
percent cobbles and 0 to 5 percent stones.
Effervescence: very slightly to strongly effervescent.
Calcium carbonate equivalent: 0 to 10 percent.
Reaction: slightly or moderately alkaline.
Visible secondary carbonate: 0 to 5 percent as coats on rock fragments.

Bq and Bkqm horizons
Hue: 7.5YR, 10YR or 2.5Y.
Value: 4 to 8, dry and 4 to 6, moist.
Chroma: 2 to 6, dry and 2 to 4, moist.
Texture of the fine earth: coarse sand, sand, loamy coarse sand, loamy
sand or sandy loam.
Clay content: 1 to 8 percent.
Rock fragments: 25 to 80 percent; with 25 to 60 percent gravel, 0 to 15
percent cobbles and 0 to 2 percent stones.
Effervescence: very slightly to violently effervescent.
Calcium carbonate equivalent: 0 to 15 percent.
Reaction: neutral to moderately alkaline.
Visible secondary carbonate: 0 to 60 percent as coats on rock fragments.
Silica: 0 to 5 percent durinodes and 0 to 15 percent masses in the matrix
and 0 to 20 percent as coats on rock fragments.
Cementation: noncemented to moderately cemented matrix with 60 to 100
percent cementation.

COMPETING SERIES: This is the Kenalduma (CA) series. Kenalduma soils have a duripan with an upper boundary between 18 and 50 centimeters and average less than 18 percent clay in the control section.

GEOGRAPHIC SETTING: Deprave soils are on fan remnants. Slopes range from 0 to 4 percent. These soils formed in alluvium from granitoid and/or gneiss. Elevations range from 160 to 525 meters (525 to 1,720 feet). The climate is arid, with hot, dry summers and warm, moist winters. The mean annual precipitation is 50 to 100 millimeters (2 to 4 inches) and the mean annual air temperature is 23 to 26 degrees C (73.5 to 80.5 degrees F). The frost-free season is 360 to 365 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kenalduma, Rizzo, Rockhound and Roostertail series. Kenalduma, Rockhound and Roostertail soils are on similar landscape positions. Kenalduma and Roostertail soils have a duripan with an upper boundary between 18 and 50 centimeters and 100 and 150 centimeters from the soil surface, respectively. Rockhound soils have an argillic horizon and do not have a duripan. Rizzo soils are in adjacent washes, inset fans and fan aprons and have sandy-skeletal particle-size control sections and no diagnostic horizons.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; very low or low runoff; high saturated hydraulic conductivity above the argillic horizon, moderately high saturated hydraulic conductivity within the argillic horizon and moderately low within the duripan.

USE AND VEGETATION: Deprave soils are used for recreation and wildlife habitat. The vegetation is mainly very sparse creosote bush and burrobush.

DISTRIBUTION AND EXTENT: Colorado Desert of southeastern California. MLRA 31. These soils are of small extent.

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

SERIES ESTABLISHED: Riverside County, California; Soil Survey of Joshua Tree National Park, 2012. The name is coined.

REMARKS: Diagnostic horizons and features in this pedon include:

Ochric epipedon - from a depth of 4 to 10 centimeters (A horizon).
Argillic horizon - from a depth of 10 to 39 centimeters (Btk horizon).
Duripan - from a depth of 98 to 160 centimeters (Bkqm horizons).
Particle-size control section - from a depth of 10 to 39 centimeters (Btk
horizon).

ADDITIONAL DATA: NASIS Pedon User ID: VIPA16.

Responsibility for this series was transferred from Davis to Phoenix 12/2015. The last revision to the series was 5/2012. ET

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National Cooperative Soil Survey
U.S.A.