LOCATION BOOMERANG CA

Established Series
LJL/MEB
02/2025

BOOMERANG SERIES

The Boomerang series consists of very deep, somewhat excessively drained soils that formed in alluvium derived from mixed sources. Boomerang soils are on fan aprons and inset fans. Slopes range from 2 to 8 percent. The mean annual precipitation is about 200 mm and the annual temperature is about 14 degrees C.

TAXONOMIC CLASS: Sandy, mixed, thermic Ustic Torriorthents

TYPICAL PEDON: Boomerang gravelly coarse sandy loam, on a north facing, convex, 6 percent slope under rangeland at an elevation of 1409 meters. (Colors are for dry soils unless otherwise noted. Described on 10/31/2012) The soil surface is covered by approximately 35 percent fine gravel, 40 percent medium and coarse gravel, 2 percent cobbles, 1 percent stones.

A--0 to 4 cm (0 to 2 inches); grayish brown (10YR 5/2) gravelly coarse sandy loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; few very fine roots throughout; few fine tubular and many very fine tubular pores; 12 percent fine gravel, 8 percent medium and coarse gravel, 2 percent cobbles; slightly alkaline (pH 7.6); abrupt smooth boundary. (3 to 6 cm, 1 to 2 inches thick)

Ct1--4 to 32 cm (2 to 13 inches); brown (10YR 5/3) gravelly loamy coarse sand, dark brown (10YR 3/3) moist; massive; slightly hard, very friable, nonsticky and nonplastic; few fine roots throughout and few medium roots throughout and few coarse roots throughout and common very fine roots throughout; few fine tubular and many very fine tubular pores; 3 percent faint, yellowish brown (10YR 5/6), dry, clay films on rock fragments; 13 percent fine gravel, 7 percent medium and coarse gravel, 2 percent cobbles; neutral (pH 7.2); clear wavy boundary.

Ct2--32 to 94 cm (13 to 37 inches); dark yellowish brown (10YR 4/4) gravelly loamy sand, dark yellowish brown (10YR 3/4) moist; massive; moderately hard, very friable, nonsticky and nonplastic; few fine roots throughout and common very fine roots throughout; few fine tubular and common very fine tubular pores; 3 percent faint, yellowish brown (10YR 5/6), dry, clay films on rock fragments; 14 percent fine gravel, 6 percent medium and coarse gravel, 2 percent cobbles; neutral (pH 7.2); diffuse wavy boundary.

C--94 to 160 cm (37 to 63 inches); yellowish brown (10YR 5/4) stratified gravelly coarse sand to very gravelly coarse sand, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; few fine roots throughout and few very fine roots throughout; common fine interstitial and many very fine interstitial pores; 18 percent fine gravel, 12 percent medium and coarse gravel, 2 percent cobbles; slightly alkaline (pH 7.4); averages gravelly coarse sand. (The combined thickness of the C horizons is 140 to 165 cm, 55 to 65 inches.)

TYPE LOCATION: San Bernardino County, California; about 5 miles east and 1 mile north of Cima; approximately 910 feet east and 220 feet north of the southwest corner of section 32, T. 14 N., R. 15 E., San Bernardino Base and Meridian; USGS Mid Hills, California 7.5 minute topographic quadrangle; 35 degrees, 14 minutes, 48.80 seconds north latitude and 115 degrees, 24 minutes, 32.48 seconds west longitude; 644748e, 3901583n (DTM: NAD83).

RANGE IN CHARACTERISTICS:
Soil moisture: usually dry, moist in some part from December to March and intermittently moist for 10 to 20 days during July to September following summer convection storms; aridic moisture regime that borders on ustic.

Soil temperature: 15 to 17 degrees C (59 to 63 degrees F).
Surface rock fragments: 10 to 60 percent dominantly gravel.

Control section
Clay content: 1 to 8 percent.
Rock fragments: average 10 to 35 percent dominantly gravel, range from 5 to 50 percent.
Effervescence: noneffervescent to slightly effervescent.

A horizons
Value: 5 or 6 dry, 3 or 4 moist.
Chroma: 2 or 4 dry, 2 to 4 moist.
Clay content: 3 to 10 percent.
Rock fragments: 0 to 35 percent.
Reaction: neutral to slightly alkaline.

C horizons
Value: 5 to 7 dry, 4 or 5 moist
Chroma: 2 to 4 dry, 3 or 4 moist.
Texture: coarse sand, sand, loamy coarse sand and loamy sand.
Clay content: 1 to 8 percent.
Rock fragments: 5 to 50 percent dominantly gravel with 0 to 10 percent cobbles.
Reaction: neutral to moderately alkaline.

COMPETING SERIES: There are no competing series at this time.

GEOGRAPHIC SETTING: Boomerang soils are on fan aprons and inset fans. Slopes are 2 to 8 percent. These soils formed in alluvium derived from mixed sources. Elevation is 1260 to 1540 meters (~4100 to 5050 feet). Mean annual precipitation is 175 to 225 mm (~7 to 9 inches). The mean annual air temperature is 13 to 15 degrees C (~55 to 59 degree F). Frost free season is 250 to 280 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These soils are Cetrepas, Devamine (T), Vallegold (T), and Orwash series. Cetrpas soils are on rock pediments and are loamy-skeletal, shallow to bedrock, and have an argillic horizon. Devamine soils are on fan remnants and are coarse-loamy with an argillic horizon. Vallegold soils are on rock pediments and are loamy, shallow to bedrock and have an argillic horizon. Orwash soils are on lower fan aprons, are typic-aridic, and have less than 35 percent rock fragments.

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

USE AND VEGETATION: These soils are used for recreation and wildlife habitat. Vegetation is black brush, burrobush, Nevada jointfir and Joshua tree.

DISTRIBUTION AND EXTENT: Mojave Desert of southeastern California; MLRA 30. These soils are 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, 2011. The name is coined for a mine within the mapping area.

REMARKS: Diagnostic horizons and features in the pedon include:

Ochric epipedon - the zone from 0 to 18 cm (A and part of the Ct1 horizons)
Particle size control section - the zone from 25 to 100 cm (part of the Ct1, Ct2, and part of the C horizons)

ADDITIONAL DATA: NASIS User Site/Pedon ID: 2013CA7953011. Originally setup at 11CA795110 as a minor component in map unit 110. Type location was moved to 2013CA7953011, where it is a major component of the map unit.

National Cooperative Soil Survey
U.S.A.