LOCATION RODELL                  NV

Established Series
Rev. LIL-WED-DLJ-JBF
01/2020

RODELL SERIES

The Rodell series consists of shallow, somewhat excessively drained soils that formed in residual material derived from granitic rocks. The Rodell soils are on mountain side slopes. Slopes are 50 to 75 percent. The mean annual precipitation is about 460 mm and the mean annual temperature is about 3 degrees C.

TAXONOMIC CLASS: Sandy-skeletal, mixed Lithic Cryorthents

TYPICAL PEDON: Rodell extremely bouldery coarse sandy loam, woodland, rangeland and wildlife habitat. (Colors are for dry soil unless otherwise noted.) The soil surface is covered with 20 percent boulders and 5 percent cobbles with pine needles and some grass litter, undecomposed in upper part, partially decomposed in lower part.

A1--0 to 5 cm; grayish brown (10YR 5/2) extremely bouldery coarse sandy loam, very dark grayish brown (10YR 3/2) moist; weak very fine and fine granular structure; soft, very friable, nonsticky and slightly plastic; many very fine and fine roots; many very fine interstitial pores; 50 percent gravel, 5 percent cobbles and 20 percent boulders; moderately acid (pH 6.0); abrupt wavy boundary. (5 to 8 cm thick)

A2--5 to 13 cm; grayish brown (10YR 5/2) gravelly coarse sandy loam, very dark grayish brown (10YR 3/2) moist; moderate fine subangular blocky structure; slightly hard, very friable, nonsticky and slightly plastic; many very fine and fine, few medium roots; common very fine interstitial and tubular pores; 30 percent gravel; moderately acid (pH 6.0); clear wavy boundary. (5 to 8 cm thick)

C1--13 to 28 cm; pale brown (10YR 6/3) very gravelly loamy coarse sand, brown (10YR 4/3) moist; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine, fine and medium, few coarse roots; many very fine interstitial pores; about 35 percent gravel and 5 percent cobbles; moderately acid (pH 6.0); clear wavy boundary. (8 to 18 cm thick)

C2--28 to 43 cm; very pale brown (10YR 8/2) very gravelly loamy sand, pale brown (10YR 6/3) moist; massive; soft, very friable, nonsticky and nonplastic; many very fine, fine and medium roots; many very fine interstitial and tubular pores; 30 percent gravel and 10 percent cobbles; moderately acid (pH 6.0); gradual wavy boundary. (8 to 18 cm thick)

R--43 cm; fractured hard granite with fragments of boulder size; roots and some soil in crevices between fragments.

TYPE LOCATION: Humboldt County, Nevada; about 23 miles south and 4 miles west of Denio; about 1,600 feet east and 950 feet north of the Southwest corner of section 1, T. 43 N., R. 28 E.; USGS Duffer Peak 7.5 minute topographic quadrangle; latitude 41 degrees 40 minutes 40 seconds N and longitude 118 degrees 43 minutes 16 seconds W;
WGS84 Decimal Degrees 41.6777778 latitude, -118.7211111 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and spring, dry late July through early October; xeric soil moisture regime that borders on aridic.
Average annual soil temperature: 3 to 6 degrees C.
Average summer soil temperature: 12 to 15 degrees C.
Depth to bedrock: 25 to 50 cm.
Reaction: Medium acid or slightly acid.

Particle-size control section - Clay content: 5 to 10 percent.
Rock fragments: 35 to 45 percent, mostly gravel.

A horizon
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3.

C horizon
Value: 6 through 8 dry, 4 through 6 moist.
Chroma: 2 or 3.
Texture: Loamy coarse sand, loamy sand.
Rock fragment: 35 to 45 percent gravel.

COMPETING SERIES: These are the Briggsranch, Goldflint, Granylith and Zonite series.

Briggesranch and Zonite soils have a lithic contact less than 25 cm. Goldflint soils have an ustic soil moisture regime. Granylith soils have a xeric soil moisture regime and a mean summer soil temperature less than 8 degrees C.

GEOGRAPHIC SETTING: Rodell soils are on mountain side slopes. These soils formed in residuum from granitic rocks. Slopes are 50 to 75 percent. Elevations are 2,100 to 2,900 meters. The climate is cold, continental with cold moist winters and cool dry summers. The mean annual precipitation is 400 to 500 mm; mean annual temperature is 2 to 4 degrees C.

GEOGRAPHICALLY ASSOCIATED SOILS: These are Aycab and Tosp soils. Aycab soils have Mollic epipedons and paralithic contact between 61 and 100 cm. Tosp soils have Mollic epipedons and are deep.

DRAINAGE AND PERMEABILITY: Somewhat excessively drained; very rapid runoff; rapid permeability; high saturated hydraulic conductivity.

USE AND VEGETATION: Woodland, rangeland and wildlife habitat. The present vegetation is mainly white bark pine, with an understory of mountain big sagebrush, currant, mountain brome, Columbia needlegrass and big squirreltail.

DISTRIBUTION AND EXTENT: Northwest Nevada. These soils are not extensive.

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

SERIES ESTABLISHED: Humboldt County (West Part), Nevada, 1993.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the surface to 18 cm (A1, A2 and part of the C1 horizons).
Lithic contact - The boundary at about 43 cm (the R layer)
Particle-size control section - The zone from 25 to 43 cm (The C2 horizon and part of the C1 horizon)

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National Cooperative Soil Survey
U.S.A.