LOCATION GLEAN                   CA+NV

Established Series
Rev. HRS-GMK-LCL-JBF
03/2017

GLEAN SERIES

The Glean series consists of deep, well drained soils that formed in colluvium derived from mixed rocks including metamorphic rocks, basalt, rhyolite and andesite. Glean soils are on mountain slopes. Slopes are 4 to 75 percent. The mean annual precipitation is about 300 mm and the mean annual temperature is about 7 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Pachic Haploxerolls

TYPICAL PEDON: Glean extremely stony sandy loam--rangeland on a 50 percent north facing slope under big sagebrush and perennial grasses at 1,707 meters elevation. (Colors are for dry soil unless otherwise noted.)

A1--0 to 8 cm; dark grayish brown (10YR 4/2) extremely stony sandy loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine and common medium and coarse roots; many very fine interstitial pores; 30 percent gravel, 15 percent cobbles and 15 percent stones; slightly acid (pH 6.4); clear wavy boundary. (3 to 36 cm thick)

A2--8 to 15 cm; dark grayish brown (10YR 4/2) extremely stony sandy loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine and common medium and coarse roots; many very fine interstitial pores; 30 percent gravel, 15 percent cobbles and 15 percent stones; slightly acid (pH 6.4); clear wavy boundary. (5 to 18 cm thick)

A3--15 to 43 cm; dark grayish brown (10YR 4/2) very gravelly sandy loam, very dark grayish brown (10YR 3/2) moist; weak medium and coarse granular structure; slightly hard, friable, nonsticky and nonplastic; common very fine, medium, and coarse roots; many very fine interstitial pores; 30 percent gravel and 15 percent cobbles; slightly acid (pH 6.5); clear wavy boundary. (0 to 36 cm thick)

AC--43 to 74 cm; grayish brown (10YR 5/2) very gravelly sandy loam, dark brown (10YR 3/3) moist; weak medium and coarse granular structure; slightly hard, friable, nonsticky and nonplastic; common fine, medium and coarse roots; common very fine tubular and interstitial pores; very few faint colloid stains on sand grains; 30 percent gravel and 10 percent cobbles slightly acid (pH 6.5); gradual wavy boundary. (18 to 46 cm thick)

C1--74 to 99 cm; grayish brown (2.5Y 5/2) very gravelly sandy loam, olive brown (2.5Y 4/4) moist; massive parting to weak very coarse granular structure; slightly hard, friable, slightly sticky and nonplastic; common very fine and fine and few medium and coarse roots; common very fine tubular and interstitial pores; very few faint colloid stains on sand grains; 30 percent gravel and 15 percent cobbles slightly acid (pH 6.5); gradual wavy boundary. (13 to 58 cm thick)

C2--99 to 130 cm; grayish brown (2.5Y 5/2) very cobbly sandy loam, olive brown (2.5Y 4/4) moist; massive; slightly hard, friable, nonsticky and nonplastic; common very fine and fine and few medium and coarse vertical roots; few fine tubular and interstitial pores; 30 percent gravel and 25 percent cobbles slightly acid (pH 6.5); abrupt wavy boundary. (0 to 64 cm thick)

2R--130 to 137 cm; andesite with some fractures.

TYPE LOCATION: Lassen County, California; about 4.5 mile southwest of Hallelujah Junction; 1,320 feet south and 600 feet west of center of section 29, T. 22 N., R. 17 E.; USGS Evans Canyon 7.5 minute topographic quadrangle; latitude 39 degrees 43 minutes 39 seconds N, longitude 120 degrees 06 minutes 11 seconds W; WGS84 Decimal Degrees 39.7275000 latitude, -120.1030556 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and spring and continuously dry in all parts for significant periods in summer and fall; typic xeric soil moisture regime.
Mean annual soil temperature: 6 to 8 degrees C.
Mollic thickness: 50 to 80 cm.
Depth to a lithic contact: 100 to 178 cm.
Reaction: Slightly acid through slightly alkaline.

Particle-size control section - Clay percent: Averages 8 to 18 percent.
Rock fragments: Averages 40 to 70 percent by volume of gravel, cobblestones, and stones.

A horizon
Value: 3 or 4 dry 2 or 3 moist.
Chroma: 1 or 2.
Structure: Granular or subangular blocky.
Organic matter: 1 to 3 percent.

C horizon
Hue: 10YR, 7.5YR or 2.5Y.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 or 2.
Texture: Ranges from sandy loam to loam modified by gravel, cobblestones, stones, and boulders.

COMPETING SERIES: These are the Baldridge, Beehunt, Burgi, Chambeam, Climine, Ginser, Lambring, Lonecabin, Rondowa, Shorthike, Sinker, Smidale, Webfoot, Westbutte and Willynat series.

Baldridge and Chambeam soils are dry 45 to 60 days. Beehunt, Lonecabin, Shorthike and Willynat soils lack bedrock between 100 to 178 cm. Burgi, Climine and Smidale and soils have more than 18 percent clay in the particle-size control section. Sinker and Westbutte soils are moderately deep to hard bedrock. Lambring soils have C horizons with hue of 10YR. Rondowa soils are dry less than 90 days. Webfoot soils are saturated at a depth of 30 to 60 cm from March through June.

GEOGRAPHIC SETTING: The Glean soils are on mountain slopes at elevations of 1,370 to 2,500 meters. They formed in colluvium derived from mixed rocks including metamorphic, basalt, and andesite. Slopes are 4 to 75 percent. The climate is cool, semiarid with warm, dry summers and cold, moist winters. Mean annual precipitation is 250 to 400 mm. The mean annual air temperature is 5 to 7 degrees C. The frost-free season is 30 to 45 days and up to 80 days in Nevada.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aldax, Millich, and Trosi soils. Aldax and Millich soils have a lithic contact at depths of less than 50 cm. Trosi soils lack a mollic epipedon and have a duripan.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well-drained; medium to very rapid runoff; high saturated hydraulic conductivity.

USE AND VEGETATION: Used for livestock grazing. The vegetation is big sagebrush, bitterbrush, scattered Jeffrey pine, cheatgrass, squirreltail, Sandberg bluegrass, Idaho fescue, and basin wildrye.

DISTRIBUTION AND EXTENT: Northeastern California and northern Nevada. The soils of this series are extensive. MLRAs 26, 25 and 23.

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

SERIES ESTABLISHED: Lassen County, California, 1973.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Pachic horizon - The zone from the soil surface to about 74 cm (A1, A2, A3 and AC horizons).
Lithic contact - The boundary at 130 cm (2R horizion).
Particle-size control section - The zone from 25 to 100 cm (AC and C1 horizons and portions of the A3 and C2 horizons).

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National Cooperative Soil Survey
U.S.A.