LOCATION PINEZ                   NV

Established Series
Rev. JR/RLB/WED
12/2015

PINEZ SERIES

The Pinez series consists of deep over an indurated duripan, well drained soils on fan piedmont remnants. Pinez soils formed in mixed alluvium mainly from quartzite and volcanic tuff with minor components of limestone, dolomite and shale. Slopes are 2 to 8 percent. The mean annual precipitation is about 125 mm (5 inches) and the mean annual temperature is about 18 degrees C. (64 degrees F.).

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, thermic Duric Petroargids

TYPICAL PEDON: Pinez very gravelly loamy sand - rangeland. (Colors are for dry soil unless otherwise noted). Approximately 65 percent of the soil surface is covered with pebbles, 10 percent with cobbles and 5 percent with stones.

A--0 to 10 cm (0 to 4 inches); pale brown (10YR 6/3) very gravelly loamy sand, dark yellowish brown (10YR 4/4) moist; moderate very fine and fine platy structure; soft, very friable, nonsticky and slightly plastic; few very fine and fine roots; many very fine vesicular and few very fine tubular pores; 45 percent pebbles; slightly effervescent; moderately alkaline (pH 8.2); gradual wavy boundary (5 to 15 cm (2 to 6 inches) thick)

BA--10 to 25 cm (4 to 10 inches); pale brown (10YR 6/3) very gravelly sandy loam, yellowish brown (10YR 5/4) moist; moderate very fine and fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine, fine and medium, common coarse roots; common very fine interstitial and few very fine tubular pores; 50 percent pebbles; violently effervescent; moderately alkaline (pH 8.4); gradual wavy boundary (0 to 15 cm (0 to 6 inches) thick)

Btk--25 to 74 cm (10 to 29 inches); yellowish brown (10YR 5/4) very gravelly sandy clay loam, dark yellowish brown (10YR 4/6) moist; moderate fine and medium subangular blocky structure; soft, very friable, sticky and plastic; common very fine and fine roots; many very fine interstitial and few very fine tubular pores; common faint clay films on pebbles; 60 percent pebbles; common thin lime coats and pendants on undersides of pebbles, strongly effervescent; moderately alkaline (pH 8.2); abrupt wavy boundary (20 to 51 cm (8 to 25 inches) thick).

2Bqk--74 to 104 cm (29 to 41 inches); pale brown (10YR 6/3) extremely gravelly loamy sand, dark yellowish brown (10YR 4/4) moist; single grain; loose, nonsticky and nonplastic; many very fine and fine interstitial pores; 85 percent pebbles; 75 percent strongly silica-lime cemented discontinuous plates and masses; strongly effervescent; moderately alkaline (pH 8.4); abrupt wavy boundary (25 to 51 cm (10 to 20 inches) thick).

2Bqkm--104 cm (41 inches); very pale brown (10YR 7/3) indurated duripan with laminar cap; many medium and coarse distinct very pale brown (10YR 8/2) lime coatings, light brownish gray (10YR 6/2) moist; massive; very hard, very firm, brittle; common very fine and fine interstitial and few fine tubular pores; 85 percent pebbles; violently effervescent; moderately alkaline (pH 8.4).

TYPE LOCATION: Nye County, Nevada; 2,300 feet east and 2,100 feet north of the projected southwest corner of section 7, T. 13 S., R. 46 E. north latitude 36 degrees, 48 minutes 48 seconds; west longitude 116 degrees, 52 minutes, 15 seconds.

RANGE IN CHARACTERISTICS:

Soil moisture - Usually dry. Moist in some part for short periods during winter and early spring months and for 10 to 20 days cumulative between July and October due to convection storms. Typic aridic soil moisture regime.

Soil temperature - 18 to 21 degrees C. (65 to 70 degrees F.)

Depth to duripan - 100 to 150 cm (40 to 60 inches).

Reaction - Moderately alkaline or strongly alkaline.


Control section - Clay content: 18 to 35 percent.

Rock fragments: 35 to 60 percent, mainly pebbles; lithology of fragments is mostly quartzite and/or tuff.


A horizon - Value: 6 or 7 dry, 4 through 6 moist.

Chroma: 2 through 4.


Btk horizon - Hue: 10YR or 7.5YR.

Value: 5 or 6 dry, 4 or 5 moist.

Chroma: 3 through 6.

Texture: Very gravelly sandy loam, very gravelly sandy clay loam, very gravelly clay loam.


Bqk or Bk horizons - Hue: 10YR or 7.5YR.

Value: 6 or 7 dry, 4 through 7 moist.

Chroma: 3 or 4.

Concentrations: 20 to 75 percent discontinuous silica-lime cemented lenses and plates that are weakly to strongly cemented.


2Bqkm horizon - Rupture resistance: Very strongly cemented to indurated.

COMPETING SERIES: This is the Peskah (NV) series. Peskah soils do not have Bqk horizons with silica-cemented plates and lenses and have mean annual soil temperatures ranging from 15 to 18 degrees C.

GEOGRAPHIC SETTING: The Pinez series are on fan piedmont remnants. Slopes are 2 to 8 percent. Elevations are 450 to 920 m (1,500 to 3,000 feet). The climate is hot and arid. Mean annual temperature is 17 to 19 degrees C. (63 to 68 degrees F.). Distribution of precipitation is relatively even with slight peaks in January and August. Average annual precipitation is 75 to 230 mm (3 to 9 inches). The frost-free season is 190 to 210 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Arizo, Canutio and Skelon soils. Arizo and Canutio soils lack an argillic horizon and occur on low alluvial fans and in washes. Skelon soils are found on slightly steeper alluvial fans and lack argillic horizons.

DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderately slow permeability.

USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is shadscale, spiny hopsage, wolfberry, ephedra and creosotebush.

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, 1981. The name is coined.

REMARKS:
6/16/2009: This series was reclassified from Durinodic Haplargids to Duric Petroargids in accordance with the 10th edition Keys to Soil Taxonomy.

Diagnostic horizons and features recognized in this pedon are:

Argillic horizon - The zone from about 25 to 74 cm (10 to 29 inches) (Btk horizon)

Particle-size control section - The zone from 25 to 74 cm (10 to 29 inches) (Btk horizon)

Responsibility for this series was transferred from Davis to Phoenix 12/2015. The last revision to the series was 9/2009. ET

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National Cooperative Soil Survey
U.S.A.