LOCATION SEEYA CA

Established Series
Rev. EWB-AMB-JBF-TM
06/2017

SEEYA SERIES

The Seeya series consists of very deep, poorly drained soils that formed in alluvium derived from mixed rocks. Seeya soils are on floodplains. Slopes are 0 to 4 percent. The mean annual precipitation is about 300 mm and the mean annual temperature is about 6 degrees C.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, frigid Cumulic Endoaquolls

TYPICAL PEDON: Seeya mucky loam--pastureland. (Colors are for dry soil unless otherwise noted.)

A1--0 to 15 cm; grayish brown (10YR 5/2) mucky loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine and fine roots; many very fine interstitial pores; strong effervescence; moderately alkaline (pH 8.4); clear smooth boundary. (15 to 25 cm thick)

A2--15 to 61 cm; dark gray (10YR 4/1) gravelly sandy loam, black (10YR 2/1) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine and fine roots; common very fine tubular and interstitial pores; 5 percent fine and medium strong brown (7.5YR 4/6), moist, masses of oxidized iron in matrix, and 5 percent fine dark greenish gray (5G 4/1), moist, iron depletions in matrix; 20 percent gravel; slightly acid, (pH 6.4); clear wavy boundary. (20 to 50 cm thick)

A3--61 to 91 cm; dark gray (10YR 4/1) gravelly sandy loam, very dark gray (10YR 3/1) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and fine roots; common very fine interstitial and tubular pores; 5 percent fine dark greenish gray (5G 4/1), moist, iron depletions in matrix, and 5 percent fine and medium strong brown (7.5YR 4/6), moist, masses of oxidized iron in matrix; 20 percent gravel; slightly acid, (pH 6.4); clear wavy boundary. (13 to 38 cm thick)

A4--91 to 112 cm; gray (5Y 5/1) gravelly sandy loam, black (5Y 2.5/1) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; few fine roots and common very fine roots; common very fine interstitial and few very fine tubular pores; 25 percent fine and medium strong brown (7.5YR 4/6), moist, masses of oxidized iron in matrix; 25 percent gravel; slightly acid, (pH 6.4); clear wavy boundary. (0 to 50 cm thick)

2Cg--112 to 152 cm; light gray (5Y 7/1) stratified very gravelly coarse sand to fine sandy loam, gray (5Y 5/1) moist; massive; soft, very friable, nonsticky and nonplastic; few very fine and fine roots; many very fine interstitial pores; 5 percent medium and coarse strong brown (7.5YR 4/6), moist, masses of oxidized iron in matrix; 50 percent gravel; slightly acid, (pH 6.4).

TYPE LOCATION: Mono County, California; in the Bridgeport Valley; about 250 feet north and 240 feet west of the southeast corner of section 30, T. 5 N., R. 25 E.; Bridgeport USGS 7.5 minute topographic quadrangle; latitude 38 degrees 15 minutes 28.9 seconds N and longitude 119 degrees 15 minutes 2.6 seconds W; WGS84 Decimal Degrees 38.2580278 latitude, -119.2507222 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually saturated in some part of the moisture control section during winter, spring, and early summer, usually dry in some part during summer and fall; seasonal periods of aquic moisture regime from November through June during saturation with ground water and anaerobic conditions.
Mean annual soil temperature: 7 to 8 degrees C.
Mollic epipedon thickness: 100 to 150 cm.
Depth to unconformable sandy-skeletal layers: 100 to 150 cm.
Other features: Irregular decrease in organic matter present below 25 cm.

Particle-size control section - Clay content: Averages 10 to 18 percent.
Rock fragments: Averages 15 to 35 percent, mainly gravel. Lithology of rock fragments is mixed dominantly igneous and metamorphic rocks.

A1 horizon
Hue: 10YR or 2.5Y.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 or 2, dry or moist.
Organic matter content: 7 to 12 percent.
Redoximorphic features: Redox concentrations occur as masses of iron or manganese accumulation in the matrix in some pedons.
Effervescence: Non effervescent to strongly effervescent.
Calcium carbonate equivalent: 0 to 1 percent.
Reaction: Neutral through moderately alkaline.

A2 horizon
Hue: 10YR or 2.5Y.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 or 2, dry or moist.
Texture: Gravelly sandy loam, gravelly coarse sandy loam or gravelly fine sandy loam, with thin strata of sandy loam, loam or loamy sand in some pedons.
Clay content: Averages 10 to 18 percent.
Rock fragments: Averages 15 to 35 percent.
Organic matter content: 2 to 4 percent.
Redoximorphic features: Redox concentrations occur as masses of iron or manganese accumulation in the matrix.
Reaction: Slightly acid or neutral.

A3 and A4 horizons
Hue: 10YR, 2.5Y or 5Y.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 or 2, dry or moist.
Texture: Gravelly sandy loam, gravelly coarse sandy loam or gravelly fine sandy loam, with thin strata of sandy loam, loam or loamy sand in some pedons.
Clay content: Averages 10 to 18 percent.
Rock fragments: Averages 15 to 35 percent
Redoximorphic features: Redox concentrations occur as masses of iron or manganese accumulation in the matrix.
Reaction: Slightly acid or neutral.

2Cg Horizon
Hue: 2.5Y or 5Y.
Value: 5 through 7 dry, 4 or 5 moist.
Chroma: 1 or 2 dry or moist.
Texture: Stratified very gravelly coarse sand to fine sandy loam.
Clay content: Averages 5 to 10 percent.
Rock fragments: Averages 35 to 50 percent, dominantly gravel.
Redoximorphic features: Redox concentrations occur as masses of iron or manganese accumulation in the matrix, and coating the undersides of rock fragments.

COMPETING SERIES: These are the Chaffee, Conway, Sanpoil, and Schrader soils.

Chaffee soils have calcareous material in the lower part of the profile and a presence of a Bq horizon. Conway soils have 5 percent to 15 percent volcanic glass in the coarse silt to very-coarse sand fractions of the profile and lack the presence of a sandy skeletal 2C horizon. Sanpoil and Schrader soils have less than 15 percent rock fragments in their particle-size control section.

GEOGRAPHIC SETTING: Seeya soils are on floodplains. They formed alluvium derived from mixed rocks. Slopes are 0 to 4 percent. Elevations range from 1,950 to 2,015 meters. The climate is semi-arid with cool, moist winters and warm, dry summers. The mean annual precipitation is 250 to 300 mm, mean annual temperature is 6 to 7 degrees C., and the frost-free period is 30 to 60 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Eastwalker, Goodbye, Mostval, and Steerlay series. Eastwalker and Goodbye series have greater than 18 percent clay in their particle-size control section. Mostval and Steerlay series have a mollic epipedon thickness of less than 50cm.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained; low surface runoff; moderate permeability; moderately high saturated hydraulic conductivity. Endosaturation is present with an apparent seasonal high water table within 30 cm (very shallow to shallow free water occurrence class) between January and June. Cumulative annual duration class is persistent. These soils are susceptible to occasional flooding for brief periods between December and September.

USE AND VEGETATION: Seeya soils are used for pastureland, recreation, watershed and wildlife habitat. The native vegetation is mainly sedges and rushes.

DISTRIBUTION AND EXTENT: Eastern California, east of the Sierra Nevada Range. These soils are not extensive. MLRA 26.

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

SERIES ESTABLISHED: Mono County (Coleville-Bridgeport Area), California, 2010.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the surface to 91 cm (A1, A2, A3 and A4 horizons).
Aquic conditions - The conditions of endosaturation and reduction in horizons between 15 and 152 cm at certain times in normal years (A2, A3, A4 and 2Cg horizons).
Particle-size control section - The zone from 25 to 100 cm (lower A2, A3 and upper A4 horizons).

National Cooperative Soil Survey
U.S.A.