LOCATION RODEN                   NV

Established Series
Rev. WM/IJR/PWB/JBF
11/2016

RODEN SERIES

The Roden series consists of shallow or very shallow, well drained soils that formed in residuum and colluvium derived from calcareous shale, sandstone, siltstone, and claystone. Roden soils are on hills, mountains, and rock pediments. Slopes are 2 to 50 percent. The mean annual precipitation is about 250 mm and the mean annual temperature is about 8 degrees C.

TAXONOMIC CLASS: Clayey-skeletal, smectitic, calcareous, mesic, shallow Xeric Torriorthents

TYPICAL PEDON: Roden very channery clay loam--rangeland. (Colors are for dry soil unless otherwise noted). The soil surface is partially covered with 40 percent gravel.

A--0 to 5 cm; light yellowish brown (10YR 6/4) very channery clay loam, dark yellowish brown (10YR 3/4) moist; moderate very fine subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few fine roots; many very fine interstitial pores; upper 1 cm is a hard vesicular crust; 40 percent channers; strongly effervescent; moderately alkaline (pH 8.4); abrupt smooth boundary. (2 to 10 cm thick)

Bk1--5 to 13 cm; light yellowish brown (10YR 6/4) very channery clay, yellowish brown (10YR 5/4) moist; moderate fine subangular blocky structure; hard, firm, very sticky and very plastic; common very fine through medium roots; common very fine and fine tubular pores; 40 percent channers; many secondary carbonate coats on the bottoms of rock fragments; strongly effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (5 to 15 cm thick)

Bk2--13 to 28 cm; light yellowish brown (10YR 6/4) very channery clay, yellowish brown (10YR 5/4) moist; moderate fine subangular blocky structure; hard, firm, very sticky and very plastic; common very fine through medium roots; common very fine tubular pores; many secondary carbonate coats on the bottoms of rock fragments; common weathered shale paragravel; 45 percent channers; strongly effervescent; moderately alkaline (pH 8.4); abrupt irregular boundary. (0 to 25 cm thick)

Cr--28 to 46 cm; yellowish brown (10YR 5/4) fractured shale bedrock; can be dug with hand tools; carbonate coats on some fracture faces; roots extend into fractures.

TYPE LOCATION: White Pine County, Nevada; about 50 miles west of Ely in the Pancake Range; approximately 2,400 feet west and 3,400 feet north of the projected southeast corner of section 19, T. 16 N., R. 55 E.; USGS Pogues Station 7.5 minute topographic quadrangle; latitude 39 degrees 14 minutes 44.8 seconds N and longitude 115 degrees 49 minutes 31.2 seconds W; WGS84 Decimal Degrees 39.2457778 latitude, -115.8253333 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry, moist in winter and spring, dry summer through mid fall; aridic soil moisture regime that borders on xeric.
Mean annual soil temperature: 8 to 11 degrees C.
Depth to bedrock: 20 to 36 cm to a paralithic contact. The paralithic materials are weathered sedimentary rocks such as shale, siltstone, or claystone.
Effervescence: Slightly effervescent through violently effervescent.

Particle-size control section - Clay content: Averages 35 to 50 percent.
Rock fragments: 35 to 60 percent, mainly channers.

A horizon
Hue: 10YR through 5YR.
Value: 4 through 6 dry, 3 through 5 moist.
Chroma: 2 through 4, dry or moist.

Bk horizons
Hue: 10YR through 2.5YR.
Value: 4 through 7 dry, 3 through 6 moist.
Chroma: 2 through 6, dry or moist.
Texture: Very channery clay or very channery silty clay.
Structure: Subangular blocky or angular blocky.
Consistence: Slightly hard to very hard, moderately sticky or very sticky and moderately plastic or very plastic.
Calcium carbonate equivalent: 1 to 5 percent.
Other features: Some pedons have thin layers with less than 35 percent rock fragments.

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Roden soils are on hills, mountains, and rock pediments. These soils formed in residuum and colluvium derived from calcareous shale, sandstone, siltstone, and claystone. Slopes are 2 to 50 percent. Elevations are 1,890 to 2,195 meters. The climate is semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 200 to 300 mm, the mean annual temperature is 7 to 9 degrees C, and the frost-free period is 100 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Haarvar, Izar, and Palinor soils. Haarvar soils are clayey and have mean annual soil temperatures of 12 to 14 degrees C. Izar soils are loamy-skeletal and shallow to a lithic contact. Palinor soils formed in deep alluvium and are shallow to an indurated duripan.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; moderately low saturated hydraulic conductivity.

USE AND VEGETATION: Roden soils are used for rangeland and wildlife habitat. The present vegetation is mainly black sagebrush, rabbitbrush, Indian ricegrass, and bottlebrush squirreltail.

DISTRIBUTION AND EXTENT: East-central Nevada. These soils are moderately extensive. MLRA 28B.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California.

SERIES ESTABLISHED: White Pine County, Nevada, West Part, 1990.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 18 cm (A, Bk1 and part of the Bk2 horizons).
Identifiable secondary carbonates - The zone from 5 to 28 cm (Bk1 and Bk2 horizons).
Paralithic contact - The boundary at 28 cm to underlying weathered bedrock (Cr layer).
Particle-size control section - The zone from the soil surface to 28 cm (A, Bk1, and Bk2 horizons).

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National Cooperative Soil Survey
U.S.A.