LOCATION CASLO                   NV

Established Series
Rev. RS/RLB/WED/TM
04/2015

CASLO SERIES

The Caslo series consists of very deep, poorly drained soils that formed in alluvium and lacustrine sediments form in mixed rock sources. The Caslo soils are on flood plains of basin floors. Slopes are 0 to 4 percent. The mean annual precipitation is about 4 inches and the mean annual temperature is about 62 degrees F.

TAXONOMIC CLASS: Fine-loamy, carbonatic, thermic Typic Fluvaquents

TYPICAL PEDON: Caslo silty clay loam, rangeland. The soil surface is partially covered with 10 percent pebbles.

A--0 to 1 inch; light brownish gray (10YR 6/2) silty clay loam, light brownish gray (2.5Y 6/2) moist; moderate fine platy structure; slightly hard, very friable, slightly sticky and slightly plastic; many fine vesicular and interstitial pores; 5 percent pebbles; violently effervescent; very strongly alkaline (pH 9.6); abrupt smooth boundary. (1 to 3 inches thick)

Bw--1 to 4 inches; light brownish gray (2.5Y 6/2) clay, light brownish gray (2.5Y 6/2) moist; weak medium subangular blocky structure; hard, firm, sticky and plastic; many fine interstitial pores; few soft medium salt masses and crystals; strongly effervescent; very strongly alkaline (pH 9.6); abrupt wavy boundary. (2 to 6 inches thick)

Bgy--4 to 10 inches; light gray (5Y 7/1) clay, light olive gray (5Y 6/2) moist; with few fine distinct pale brown (10YR 6/3) mottles; moderate coarse prismatic structure; very hard, firm, sticky and plastic; many very fine interstitial pores; common medium gypsum crystals; strongly effervescent; very strongly alkaline (pH 9.6); clear wavy boundary. (3 to 10 inches thick)

Cg--10 to 34 inches; pale olive (5Y 6/3) clay loam, light olive gray (5Y 6/2) moist; with few thin (1/4 to 1/2 inch) strata of very dark gray (10YR 3/1) fine sandy loam; few fine distinct pale brown (10YR 6/3) and many fine distinct brown (10YR 4/3) mottles; massive; hard, friable, sticky and plastic; many fine roots; common fine tubular pores; violently effervescent; very strongly alkaline (pH 9.2); clear smooth boundary. (16 to 30 inches thick)

C1--34 to 45 inches; stratified very pale brown (10YR 7/3) sandy loam, brown (10YR 5/3) moist, and white (10YR 8/1) clay, light gray (10YR 7/1) moist; common fine distinct brown (10YR 4/3) mottles; massive; slightly hard, friable, sticky and plastic; violently effervescent; strongly alkaline (pH 8.8); clear smooth boundary. (0 to 12 inches thick)

C2--45 to 60 inches; white (10YR 8/1) clay, light gray (10YR 7/1) moist; few fine prominent pale brown (10YR 6/3) mottles; massive; very hard, firm, sticky and plastic; violently effervescent; strongly alkaline. (pH 8.8)

TYPE LOCATION: Nye County, Nevada; approximately 2,700 feet south and 800 feet east of the northwest corner of section 4 T. 18 S., R. 50 E. 36 degrees, 25 minutes 03 seconds north latitude and 116 degrees, 21 minutes, 07 seconds west longitude.

RANGE IN CHARACTERISTICS:

Soil moisture - Usually moist, saturated in winter and early spring below a depth of one to two feet.

Soil temperature - 59 to 65 degrees F.

Calcium carbonate equivalent: 40 to 60 percent.

Reaction: Strongly alkaline or very strongly alkaline.

Effervescence: Strongly effervescent or violently effervescent.

Control section - Clay content: Averages 27 to 35 percent.

A horizon - Hue: 10YR or 2.5Y.

Value: 6 or 7 dry, 5 or 6 moist.

Chroma: 2 or 3.



Bw horizons - Hue: 10YR or 2.5Y

Value: 6 or 7 dry, 5 or 6 moist.

Chroma: 1 or 2.



Bgy horizon - Hue: 10YR, 2.5Y and 5Y.

Value: 6 through 8 dry, 5 through 7 moist.

Chroma: 1 or 2.

Other features: Few to common gypsum crystals along faces of prisms. Few redoimorphic concentrations with chroma of 3 through 6.



Cg and C horizons - Hue: 10YR, 2.5Y or 5Y.

Value: 6 through 8 (with strata of 3 or 4) dry.

Chroma: 1 through 3; chroma 3 is below 30 inches.

Texture: Stratified sandy loam to clay (averages clay loam).

Other features: few to common redox concentrations with chromas of 3 through 6.

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

GEOGRAPHIC SETTING: Caslo soils are on flood plains along basin floors. These soils formed in alluvium from mixed rock sources, dominantly from limestone. Slopes are 0 to 4 percent. Elevations are 2,000 to 2,300 feet. The climate is cool, arid with hot, dry summers and cool moist winters. The mean annual precipitation is 3 to 5 inches; mean annual temperature is 58 to 63 degrees F., and the frost-free season is 210 to 250 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are Bobnbob and Cobatus. Bobnbob soils are fine-silty and Cobatus soils have mixed mineralogy.

DRAINAGE AND PERMEABILITY: Poorly drained, slow runoff; slow permeability.

USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly saltgrass.

DISTRIBUTION AND EXTENT: Southern Nevada. These soils are not extensive. MLRA 30.

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

SERIES ESTABLISHED: Nye County, Nevada, Southwest Part, 1994. The name is coined.

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

Ochric epipedon - the zone from 0 to 7 inches (A, Bw and part of the Bgy horizon).

Particle-size control section - The zone from about 10 to 40 inches.

Responsibility for this series was transferred from Davis to Phoenix 4/2015. The last revision to the series was 1/2001. ET

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National Cooperative Soil Survey
U.S.A.