LOCATION TEEMAT WYTentative Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Ustic Haplocryolls
TYPICAL PEDON: Teemat gravelly sandy loam - rangeland. (Colors are for air-dry soil unless otherwise stated.)
A1--0 to 3 inches; brown (7.5YR 5/2) gravelly sandy loam, dark brown (7.5YR 3/2) moist; moderate fine granular structure, soft, very friable, slightly sticky, slightly plastic; many fine, common medium roots; 25 percent gravel; slightly alkaline (pH 7.6), clear wavy boundary. (3 to 8 inches thick)
A2--3 to 10 inches; brown (7.5YR 5/2) gravelly sandy loam, dark brown (7.5YR 3/2) moist; weak medium subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; many fine, common medium roots; 25 percent gravel; slightly alkaline (pH 7.8); clear wavy boundary. (0 to 8 inches thick)
Bk--10 to 60 inches; light brown (7.5YR 6/4) cobbly sandy loam, brown (7.5YR 4/4) moist; massive; slightly hard, very friable, slightly sticky, nonplastic; few fine roots to 30 inches, 20 percent cobble, 30 percent gravel, and 5 percent stone in the lower part; strong effervescence; lime crust on undersides of gravel; moderately alkaline (pH 8.2).
TYPE LOCATION: Sweetwater County, Wyoming; about 40 miles south of Rock Springs; about 2 1/2 miles south of Red Creek Ranch in NW 1/4, SE 1/4 of Sec. 11, T12N, R104W.; Red Creek Ranch USGS quad; approximate lat. 41 degrees 02 minutes 00 seconds N. and long. 109 degrees 05 minutes 19 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: ustic moisture regime
Mean annual soil temperature: 40 degrees to 43 degrees F.
Mean summer soil temperature: 55 degrees to 58 degrees F.
Thickness of mollic epipedon: 7 to 15 inches
Depth to calcareous materials: 0 to 13 inches
Depth to continuous horizons of calcium carbonate accumulation: 7 to 15 inches
Particle-size control section (weighted averages)
Rock fragment content: 35 to 80 percent gravel, cobble, and stones
Clay content: 5 to 16 percent
Texture, fine earth fraction: sandy loam or fine sandy loam
A horizons
Hue: 5YR through 10YR
Value: 4 or 5 dry and 2 or 3 moist
Chroma: 2 or 3 dry and moist
Reaction: neutral or slightly alkaline
Bk horizon
Hue: 5YR or 7.5YR
Calcium carbonate equivalent: 1 to 5 percent
Reaction: moderately alkaline or strongly alkaline
COMPETING SERIES: These are the
Antrobus,
Grafen,
Greyback,
Handran,
Maurice,
Mccort,
Midelight,
Parachute,
Sebud,
Supervisor,
Surdal,
Thornburgh,
Tiban,
Tineman, and
Vanwirt series.
Antrobus soils average more than 18 percent clay in the particle-size control section.
Grafen, Greyback, and Tineman soils have sandy-skeletal materials in the lower particle-size control section.
Handran, Maurice, Mccort, Sebud, Thornburgh, and Vanwirt soils do not have a horizon of secondary carbonate accumulation.
Midelight, Parachute, Supervisor, and Surdal soils have a lithic contact.
Tiban soils average more than 18 percent clay in the particle-size control section.
GEOGRAPHIC SETTING: The Teemat soils are on gently sloping to very steep, alluvial fans and mountain sides. Slopes are 4 to 55 percent. They formed in gravelly, calcareous alluvium. Elevation is 8,500 to 9,800 feet. Annual precipitation is 15 to 20 inches. The mean annual temperature is 39 degrees to 42 degrees F. The mean summer temperature is 54 degrees to 58 degrees F. The frost-free period is 50 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Mccort and Teeler soils. Teeler soils have argillic horizons. Mccort soils are noncalcareous.
DRAINAGE AND PERMEABILITY: Well drained, medium to high runoff, moderately rapid permeability.
USE AND VEGETATION: These soils are used for rangeland and wildlife habitat. The native vegetation is black sagebrush, big sagebrush, antelope bitterbrush, snowberry, prairie junegrass, streambank wheatgrass, Idaho fescue, spike fescue, and bluebunch wheatgrass.
DISTRIBUTION AND EXTENT: Present known distribution is limited to southwestern Wyoming. MLRA 34A, 47. The soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Sweetwater County (Red Creek Watershed area), Wyoming; 1974; (coined name).
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: from 0 to 10 inches. (A1, A2 horizons)
Secondary carbonate accumulations: from 10 to 60 inches. (Bk horizon); this horizon is presumed to have less than 5 percent carbonate equivalent in all subhorizons, hence not a calcic horizon.
Particle-size control section: The zone from 10 to 40 inches. (upper part of Bk horizon)
Series control section: The zone from 0 to 60 inches.
These soils were previously classified as Chernozems. When proposed the Teemat series was classified as loamy-skeletal, mixed Typic Cryoborolls.
Taxonomic version: Classified according to Keys to Soil Taxonomy, Tenth Edition, 2006.