LOCATION LYNNBOW                 NV

Established Series
Rev. TSB-RLB-JBF
06/2019

LYNNBOW SERIES

The Lynnbow series consists of deep, well drained soils that formed in thin loess over alluvium derived from mixed rocks and residuum derived from tuff. The Lynnbow soils are on hills, pediments and fan piedmont remnants with a rock core. Slopes are 2 to 15 percent. The mean annual precipitation is about 360 mm and the mean annual temperature is about 6 degrees C.

TAXONOMIC CLASS: Fine, smectitic, frigid Typic Palexerolls

TYPICAL PEDON: Lynnbow silt loam--rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is partially covered with 5 percent gravel.

A--0 to 10 cm; grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; weak medium platy structure; slightly hard, very friable, moderately sticky and moderately plastic; many very fine roots; many very fine tubular pores; neutral (pH 7.2); abrupt smooth boundary. (8 to 18 cm thick)

Bt1--10 to 20 cm; very dark grayish brown (10YR 3/2) silty clay, very dark brown (10YR 2/2) moist; moderate fine subangular blocky structure; slightly hard, friable, very sticky and very plastic; common very fine and fine roots; many very fine tubular pores; common faint clay films lining pores and on ped faces and as bridges between sand grains; common clean sand grains throughout; 10 percent gravel; neutral (pH 7.0); clear wavy boundary. (8 to 15 cm thick)

Bt2--20 to 38 cm; very dark grayish brown (10YR 3/2) silty clay, very dark brown (10YR 2/2) moist; strong medium subangular blocky structure; hard, firm, very sticky and very plastic; common very fine and fine roots; many very fine tubular pores; common faint clay films on ped faces and as bridges between sand grains; ped faces coated with clean sand grains; many clean sand grains in peds; 10 percent gravel; neutral (pH 7.0); abrupt wavy boundary. (15 to 23 cm thick)

Bt3--38 to 46 cm; dark brown (7.5YR 3/2) silty clay, dark brown (7.5YR 3/2) moist; strong medium prismatic structure; very hard, very firm, very sticky and very plastic; common very fine exped roots; few very fine tubular pores; continuous stress surfaces on ped faces; top of prisms coated with clean sand grains; 10 percent gravel; neutral (pH 7.2); abrupt wavy boundary. (5 to 10 cm thick)

Bt4--46 to 66 cm; brown (7.5YR 4/4) silty clay, brown (7.5YR 4/4) moist; strong medium prismatic structure; very hard, very firm, very sticky and very plastic; few very fine exped roots; few very fine tubular pores; continuous stress surfaces on ped faces; 5 percent gravel; slightly alkaline (pH 7.4); clear wavy boundary. (15 to 25 cm thick)

Btkq1--66 to 84 cm; yellowish brown (10YR 5/4) silty clay, dark yellowish brown (10YR 3/4) moist; moderate medium prismatic structure parting to strong medium and coarse angular blocky; hard, firm, very sticky and very plastic; few very fine roots; common very fine tubular pores; common strong brown (7.5YR 5/6) dry clay films with silica coats on ped faces; 14 percent gravel; common medium soft masses of carbonate; moderately alkaline (pH 8.0); clear wavy boundary. (13 to 30 cm thick)

Btkq2--84 to 100 cm; yellowish brown (10YR 5/4) silty clay, dark yellowish brown (10YR 3/4) moist; moderate medium angular blocky structure; hard, friable, very sticky and very plastic; few very fine roots; common very fine tubular pores; common strong brown (7.5YR 5/6) dry clay films with silica coats on ped faces; 14 percent gravel; common medium filaments, threads and soft masses of carbonate; slightly effervescent; moderately alkaline (pH 8.0); clear wavy boundary. (15 to 23 cm thick)

Bqk--100 to 147 cm; brown (10YR 5/3) loam, dark yellowish brown (10YR 3/4) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; weak continuous brittle matrix; 10 percent gravel; many medium filaments and threads of carbonate; slightly effervescent; moderately alkaline (pH 8.2); clear smooth boundary. (13 to 50 cm thick)

2Cr--147 cm; soft tuff.

TYPE LOCATION: Elko County, Nevada; approximately 4 miles east of Wilson Reservoir, about 1,000 feet west and 700 feet north of the southeast corner of section 22, T. 44 N., R. 51 E.; USGS Bull Run Reservoir 7.5 minute topographic quadrangle; latitude 41 degrees 41 minutes 32 seconds N and longitude 116 degrees 13 minutes 36 seconds W; WGS84 Decimal Degrees 41.6922222 latitude, -116.2266667 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and spring, dry from mid-July through October; aridic soil moisture regime bordering on xeric.
Mean annual soil temperature: 7 to 8 degrees C.
Mollic epipedon thickness: 36 to 50 cm.
Depth to paralithic contact: 114 to 150 cm.
Depth to carbonates and silica coats: 50 to 75 cm.

Particle-size control section - Clay content: 50 to 60 percent.
Rock fragments: 0 to 15 percent.

A horizon
Value: 2 or 3 moist
Chroma: 2 or 3.
Reaction: Slightly acid or neutral.

Bt horizons
Hue: 10YR or 7.5YR.
Value: 3 through 5 dry, 2 through 4 moist.
Chroma: 2 or 3.
Texture: Silty clay or clay.
Clay content: 45 to 65 percent in any one subhorizon and averages 50 to 60 percent.
Rock fragments: 0 to 15 percent.
Structure: Subangular blocky, angular blocky or prismatic.
Reaction: Neutral or slightly alkaline.

Btkq horizons
Hue: 10YR or 7.5YR.
Value: 4 or 5 dry.
Chroma: 3 or 4.
Texture: Silty clay or clay.
Clay content: 40 to 55 percent.
Rock fragments: 0 to 15 percent.
Structure: Angular blocky or prismatic.
Silica coats: Common or many on ped surfaces.
Secondary carbonates: Common or many segregated soft masses, filaments or threads.

COMPETING SERIES: These are the Bridgecreek, Coser, Deer Creek, Eoj, Goodington, Harkers, Mohocken, Norcan, Rands, and Spikebutte series.

Bridgecreek, Coser, Mohocken, and Spikebutte soils have a lithic or paralithic contact at some depth between 50 to 100 cm. Deer Creek and Harkers soils are greater than 150 cm depth to bedrock and have 20 to 35 percent rock fragments in their control section. Eoj soils are very deep and contain 15 to 35 percent rock fragments. Goodington soils have calcic horizons. Norcan soils are over 150 cm deep, have argillic horizons with hue of 2.5YR and 5YR and 35 to 46 percent clay in the particle-size control section. Rands soils are over 150 cm deep, are 25 to 48 cm deep to the Bt horizon and have gravelly clay loam textures Btk horizons.

GEOGRAPHIC SETTING: Lynnbow soils are on hills and fan-piedmont remnants with a rock core. These soils formed in thin loess over mixed alluvium and residuum derived from tuff or mixed sedimentary rock. Slopes are 2 to 15 percent. Elevations are 1,880 to 1,925 meters. The climate is cool, semiarid with warm, dry summers and cool, moist winters. The mean annual precipitation is 300 to 400 mm, mean annual temperature is 5 to 7 degrees, and the frost-free season is 70 to 100 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Rugar soils. Rugar soils have a mollic epipedon that is thicker than 50 cm.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; slow or medium runoff; moderately low saturated hydraulic conductivity.

USE AND VEGETATION: Livestock grazing and wildlife habitat. The present vegetation is mainly low sagebrush and Idaho fescue.

DISTRIBUTION AND EXTENT: North-central Nevada. MLRA 25, 28B. These soils are not extensive.

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

SERIES ESTABLISHED: Elko County, Nevada, Northeast Part, 1986.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 46 cm (A, Bt1, Bt2 and Bt3 horizons).
Argillic horizon - The zone from 10 to 100 cm (Bt1, Bt2, Bt3, Bt4, Btk1 and Btk2 horizons).
Abrupt texture change - The zone between the A and Bt1 horizon at 10 cm.
Paralithic contact - The boundary at 147 cm (2Cr layer).
Particle-size control section - The zone from 10 to 60 cm (Bt1, Bt2, Bt3 and part of 2Bt4 horizons).

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National Cooperative Soil Survey
U.S.A.