LOCATION GLENCARB                NV

Established Series
Rev. RS/RPZ/RLB/ET
04/2015

GLENCARB SERIES

The Glencarb series consists of very deep, well drained soils that formed in mixed alluvium with a large component of calcareous materials. The Glencarb soils are on flood plains, low stream terraces and basin floors. Slopes are 0 to 2 percent. The mean annual precipitation is about 5 inches and the mean annual temperature is about 66 degrees F.

TAXONOMIC CLASS: Fine-silty, carbonatic, thermic Typic Torrifluvents

TYPICAL PEDON: Glencarb silt loam-rangeland and wildlife habitat. (Colors are for dry soil unless otherwise noted.)

A1--0 to 3 inches; pale brown (10YR 6/3) silt loam, yellowish brown (10YR 5/4) moist; weak thin platy structure; soft, very friable, slightly sticky and slightly plastic; few very fine roots; violently effervescent; strongly alkaline (pH 8.8); abrupt smooth boundary. (1 to 4 inches thick)

A2--3 to 6 inches; pale brown (10YR 6/3) silt loam, yellowish brown (10YR 5/4) moist; many dark grayish brown (10YR 4/2) organic lamellae; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine and fine roots; violently effervescent; strongly alkaline (pH 8.8); abrupt wavy boundary. (0 to 6 inches thick)

C1--6 to 16 inches; very pale brown (10YR 7/4) clay loam, yellowish brown (10YR 5/4) moist; massive; soft, very friable, moderately sticky and moderately plastic; common very fine and fine, few medium roots; violently effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (3 to l8 inches thick)

C2--16 to 51 inches; very pale brown (10YR 7/3) silty clay loam, yellowish brown (10YR 5/4) moist; massive; slightly hard, friable, moderately sticky and moderately plastic; common fine and few medium roots; violently effervescent; strongly alkaline (pH 8.8); abrupt smooth boundary. (20 to 40 inches thick)

C3--51 to 54 inches; very pale brown (10YR 7/4) very fine sandy loam, yellowish brown (10YR 5/4) moist; massive; soft, very friable, slightly sticky and slightly plastic; violently effervescent; moderately alkaline (pH 8.4); abrupt smooth boundary. (0 to 6 inches thick)

C4--54 to 60 inches; very pale brown (10YR 7/3) silty clay loam, yellowish brown (10YR 5/4) moist; massive; slightly hard, friable, moderately sticky and moderately plastic; violently effervescent; moderately alkaline (pH 8.4).

TYPE LOCATION: Clark County, Nevada; Approximately 310 feet north and 130 feet east of the intersection of Nellis Boulevard and Stewart Avenue; about 2,400 feet south and 200 feet east of the northwest corner of section 33 T. 20 S., R. 62 E; USGS Las Vegas NE 7.5 minute topographic quadrangle; 36 degrees, 10 minutes, 2 seconds north latitude and 115 degrees, 3 minutes, 42 seconds west longitude; UTM 11s, 674349e, 4004248n; NAD 83.

RANGE IN CHARACTERISTICS:

Soil moisture: Usually dry, moist in some part during winter and spring and intermittingly moist in the upper part following summer convection storms; typic aridic soil moisture regime.

Soil temperature: 65 to 72 degrees F.

Control section: Averages 18 to 35 percent clay.
Texture of fine earth: Stratified, includes textures of loam, silt loam, very fine sandy loam, clay loam, silty clay loam, and silty clay. Sand fraction mostly very fine sand.

Calcium carbonate equivalent: 40 to 60 percent.

Reaction: Moderately alkaline through very strongly alkaline.

C horizon Hue: 7.5YR or 10YR.
Value: 6 or 7 dry, 4 or 5 moist.
Chroma: 2 or 3.
Other features: Commonly contains appreciable free gypsum in at least some subhorizons. 4 to 20 percent clay-sized calcium carbonate material is present.

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Glencarb soils are on flood plains, low stream terraces, and basin floors. These soils formed in mixed alluvium with a large component of calcareous materials. Slopes are 0 to 2 percent. Elevations are 1,400 to 2,400 feet. The climate is low-latitude desert, with mild winters and very hot summers. Precipitation is greatest in the winter with a lesser secondary peak in summer, typical of the Mojave Desert. The mean annual precipitation is 3 to 7 inches; mean annual temperature is 63 to 70 degrees F., and the frost-free season is 180 to 300 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Land, Las Vegas, Paradise, and Spring soils. Land soils have a salic horizon. Las Vegas soils have a petrocalcic horizon. Paradise soils have a mollic epipedon. Spring soils have a gypsic horizon.

DRAINAGE AND PERMEABILITY: Well drained. Low runoff; moderately slow permeability. In some areas a high water table is present as the result of irrigation or other water redistribution.

USE AND VEGETATION: These soils are used for urban development, irrigated agriculture, rangeland and wildlife habitat. The present vegetation is mainly creosotebush, fourwing saltbush, big saltbush, alkali sacaton, and inland saltgrass.

DISTRIBUTION AND EXTENT: Mojave Desert of southern Nevada; MLRA 30. These soils are not extensive.

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

SERIES ESTABLISHED: Clark County, Nevada. l988.

REMARKS: Diagnostic horizon and features recognized in this pedon are:

Fluventic features - Irregular decrease in organic matter.

Particle size control section - 10 to 40 inches (Part of the C1 and part of the C2 horizons)

Responsibility for this series was transferred from Davis to Phoenix 4/2015. The last revision to the series was 5/2006. ET

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National Cooperative Soil Survey
U.S.A.