LOCATION DALELAKE                CA

Established Series
Rev: PBF/CAH/ET
04/2015

DALELAKE SERIES

The Dalelake series consists of very deep, somewhat excessively drained soils that formed in eolian material from mixed sources. Dalelake soils are on dunes, coppice dunes and sand sheets. Slopes range from 0 to 30 percent. The mean annual precipitation is about 100 millimeters (4 inches) and the mean annual air temperature is about 21.5 degrees C (71 degrees F).

TAXONOMIC CLASS: Mixed, hyperthermic Typic Torripsamments

TYPICAL PEDON: Dalelake fine sand, on a north northwest-facing, convex, 8 percent slope under desert shrubs and grasses at an elevation of 535 meters (1,755 feet). (Colors are for dry soil unless otherwise noted.)

A -- 0 to 6 centimeters (0 to 2.5 inches); very pale brown (10YR 7/3) fine sand, pale brown (10YR 6/3) moist; weak thick platy structure; loose, nonsticky and nonplastic; few very fine roots; neutral (pH 6.8); clear wavy boundary. (3 to 7 centimeters)

C1 -- 6 to 45 centimeters (2.5 to 18 inches); very pale brown (10YR 7/3) fine sand, pale brown (10YR 6/3) moist; single grain; loose, nonsticky and nonplastic; few very fine, fine, medium and coarse roots; slightly alkaline (pH 7.6); gradual wavy boundary.

C2 -- 45 to 150 centimeters (18 to 59 inches); very pale brown (10YR 7/3) fine sand, pale brown (10YR 6/3) moist; single grain; loose, nonsticky and nonplastic; few medium and coarse roots; neutral (pH 7.2). (Combined thickness of the C horizons is greater than 100 centimeters)

TYPE LOCATION: San Bernardino County, California; approximately 4 kilometers southeast of the junction of Highway 62 and Iron Age Road; 1,175 meters (3,855 feet) south and 1,443 meters (4,734 feet) east of the SE corner of section 12, T. 1 S., R. 12 E., San Bernardino Base and Meridian; USGS New Dale, CA 7.5 minute topographic quadrangle; 34 degrees, 4 minutes and 53.8 seconds north latitude, and 115 degrees, 39 minutes and 07.8 seconds west longitude; UTM 11S 0624353e 3772025n (DTM: NAD83).

RANGE IN CHARACTERISTICS:

Soil moisture control section: usually dry, moist in some parts for short
periods during winter and early spring and for 10 to 20 days cumulative
between July and September following convection storms. The soils have a
typic-aridic soil moisture regime.

Soil temperature: 22 to 25 degrees C (72 to 77 F).
Surface rock fragments: 0 to 60 percent; with 0 to 60 percent gravel and 0 to
5 percent cobbles.

Control section -
Rock fragments: ranges from 0 to 7 percent; dominantly fine gravel.
Clay content: 1 to 4 percent.

Organic matter: 0 to 0.5 percent.

A horizon
Value: 6 or 7, dry; 4 to 6, moist.
Chroma: 2 to 4, dry or moist.
Clay content: 1 to 4 percent.
Rock fragments: 0 to 10 percent gravel.
Reaction: neutral to moderately alkaline.
Electrical conductivity: 0 to 2 dS/m.

C horizon
Value: 6 or 7, dry; 4 to 6, moist.
Chroma: 3 or 4, dry or moist.
Clay content: 1 to 4 percent.
Rock fragments: 0 to 5 percent gravel.
Effervescence: noneffervescent to strongly effervescent.
Reaction: neutral to strongly alkaline in the upper part and moderately to
very strongly alkaline in the lower part.
Electrical conductivity: 0 to 2 dS/m.

COMPETING SERIES: These are the Carsitas (CA), Lagunita (AZ), Myoma (CA), Pintobasin (CA), and Rositas (CA) series. Carsitas, Lagunita, and Pintobasin soils formed in alluvium. In addition, Carsitas soils have more than 15 percent rock fragments and are dry for most of the year in the moisture control section. Lagunita soils are stratified, and have an irregular decrease in organic carbon and Pintobasin soils do not allow fine sand textures. Rositas soils include disseminated calcium carbonate or small amounts of calcium carbonate masses. Myoma soils have hues of 2.5Y or yellower throughout and contain conch and clam shells throughout the control section, and are dry for most of the year in the moisture control section.

GEOGRAPHIC SETTING: Dalelake soils are on sand dunes, coppice dunes and sand sheets. Slopes range from 0 to 30 percent. These soils formed in eolian material from mixed sources. Elevations range from 210 to 750 meters (690 to 2,460 feet). The climate is arid, with hot, dry summers and warm, moist winters. The mean annual precipitation is 75 to 125 millimeters (3 to 5 inches) and the mean annual air temperature is 20 to 23 degrees C (68 to 73.5 degrees F). The frost-free season is 300 to 340 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bolero, Ironage, Pintobasin, Coxpin, Carrizo, Sheephole and Supplymine soils. Bolero, Ironage, and Supplymine soils are on adjacent mountains. Bolero soils have a sandy-skeletal particle-size control section and a lithic contact within 36 centimeters (14 inches). Ironage and Supplymine soils have loamy-skeletal particle-size control sections and calcic horizons. Ironage soils have a lithic contact within 50 centimeters (20 inches). Pintobasin and Carrizo soils are formed in alluvium and are found in adjacent drainageways. Pintobasin soils also occur on some adjacent fan aprons. Pintobasin soils have coarser sand textures and allow more rock fragments throughout the control section. Carrizo soils have a sandy-skeletal particle-size control section. Coxpin soils are found on adjacent fan remnants and have a weakly to moderately cemented duripan. Sheephole soils are on similar landforms but have an alluvial layer which contains more than 35 percent rock fragments within the particle-size control section.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat excessively drained; negligible to low runoff; high saturated hydraulic conductivity.

USE AND VEGETATION: Dalelake soils are used for recreation and wildlife habitat. The present vegetation is mainly big galleta, creosote bush, and dyebush.

DISTRIBUTION AND EXTENT: Southern Mojave Desert of southeastern California. MLRA 30. These soils are of moderate extent.

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

SERIES ESTABLISHED: San Bernardino County, California; Soil Survey of Joshua Tree National Park, 2012. The name is from Dale Lake, a playa directly north of the survey area.

REMARKS: Diagnostic horizons and features in this pedon include:

Ochric epipedon - from a depth of 0 to 6 centimeters (A horizon).
Particle size control section - from a depth of 25 to 100 centimeters (the
lower part of the C1 horizon and upper part of the C2 horizon).

ADDITIONAL DATA: NASIS Pedon User ID: 12476050-E.

Responsibility for this series was transferred from Davis to Phoenix 4/2015. The last revision to the series was 5/2012. ET

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National Cooperative Soil Survey
U.S.A.