LOCATION BRUNER WY
Tentative Series
DPG/DJP/CBR
05/2020
BRUNER SERIES
The Bruner series consists of very deep, well drained soils that formed in colluvium derived from interbedded sedimentary rocks. These soils are on eroded fan remnant sideslopes. Slopes are 35 to 60 percent. Mean annual precipitation is about 280 mm and mean annual air temperature is about 4.0 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Calcic Haploxerepts
TYPICAL PEDON: Bruner extremely gravelly sandy clay loam, in rangeland (colors are for dry soil unless otherwise noted).
A--0 to 3 cm; brown (10YR 5/3) extremely gravelly sandy clay loam, dark brown (10YR 3/3), moist; weak fine granular structure; friable, slightly hard, moderately sticky, moderately plastic; many very fine, fine, few medium and coarse roots; many fine irregular pores; 55 percent gravel and 10 percent cobbles; slightly alkaline (pH 7.4); clear smooth boundary. (3 to 6 cm thick)
Bw--3 to 16 cm; brown (10YR 5/3) very gravelly sandy clay loam, dark brown (10YR 3/3), moist; weak medium subangular blocky structure; friable, slightly hard, moderately sticky, moderately plastic; many very fine and fine, few medium, and few coarse roots; many fine irregular pores; 30 percent gravel and 10 percent cobbles; slightly alkaline, (pH 7.6); clear smooth boundary. (10 to 15 cm thick)
Bk--16 to 29 cm: dark yellowish brown (10YR 4/4) very gravelly clay loam, dark yellowish brown (10YR 3/4), moist; weak medium subangular blocky structure; friable, slightly hard, moderately sticky, moderately plastic; few medium and coarse roots; many fine irregular pores; 40 percent gravel and 5 percent cobbles; 5 percent carbonate concretions on bottom surfaces of rock fragments; slightly effervescent; slightly alkaline (pH 7.8); clear smooth boundary. (13 to 25 cm thick)
BCk--29 to 64 cm; yellowish brown (10YR 5/4) very gravelly clay loam, dark yellowish brown (10YR 4/4), moist; weak fine subangular blocky structure; friable, slightly hard, moderately sticky, moderately plastic; few medium and coarse roots; few fine irregular pores; 35 percent gravel and 20 percent cobbles; 20 percent carbonate concretions on bottom surfaces of rock fragments; strongly effervescent; moderately alkaline (pH 8.2); clear, smooth boundary. (25 to 40 cm thick)
C--64 to 200 cm; yellowish brown (10YR 5/4) extremely gravelly clay loam, dark yellowish brown (10YR 4/4), moist; massive; friable, slightly hard, moderately sticky, moderately plastic; 50 percent gravel and 20 percent cobbles; 20 percent carbonate concretions on bottom surfaces of rock fragments; strongly effervescent; moderately alkaline (pH 8.2).
TYPE LOCATION: Lincoln County, Wyoming; USGS Nugent Park, Wyoming, topographic quadrangle; 42 degrees 12 minutes 56.4 seconds north latitude and 110 degrees 52 minutes 10.12 seconds west longitude, datum WGS84.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--3.0 to 7.0 degrees C.
Depth to cambic--3 to 6 cm
Depth to secondary carbonates--13 to 25 cm
Particle-size control section (weighted averages):
Clay content--28 to 34 percent
Total rock fragments--49 to 64 percent
A horizon
Hue: 10YR or 2.5Y
Value: 3 to 5 dry, 2 or 3 moist
Chroma: 2 or 3 moist
Clay content: 21 to 30 percent
Rock fragments: 61 to 70 percent, 50 to 60 percent gravel and 5 to 15 percent cobbles
Reaction: pH 7.0 to 7.6
Bw horizon
Hue: 10YR or 2.5Y
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 3 to 6
Clay content: 21 to 30 percent
Rock fragments: 40 to 55 percent, 25 to 35 percent gravel and 5 to 20 percent cobbles
Reaction: pH 7.0 to 7.8
Bk horizon
Hue: 10YR or 2.5Y
Value: 4 or 5
Chroma: 4 to 6 dry, 3 to 6 moist
Clay content: 28 to 35 percent
Rock fragments: 40 to 50 percent, 35 to 45 percent gravel and 0 to 10 percent cobbles
Calcium carbonate equivalent: 3 to 5 percent
Reaction: pH 7.6 to 8.0
BCk horizon
Hue: 10YR or 2.5Y
Value: 4 or 5
Chroma: 4 to 6 dry, 3 to 6 moist
Clay content: 28 to 34 percent
Rock fragments: 50 to 65 percent, 30 to 40 percent gravel and 15 to 25 percent cobbles
Calcium carbonate equivalent: 5 to 15 percent
Reaction: pH 8.0 to 8.4
C horizon
Hue: 10YR or 2.5Y
Value: 4 or 5
Chroma: 4 to 6 dry, 3 to 6 moist
Clay content: 28 to 34 percent
Rock fragments: 350 to 65 percent, 30 to 40 percent gravel and 15 to 25 percent cobbles
Calcium carbonate equivalent: 5 to 15 percent
Reaction: pH 8.0 to 8.4
COMPETING SERIES:
There are no competing series.
GEOGRAPHIC SETTING:
Landform--eroded fan remnant sideslopes
Elevation--1,880 to 2,080 meters
Slope--35 to 60 percent
Parent material--colluvium derived from interbedded sedimentary rock
Climate--long, cold winters; cool, moist springs; short, warm summers
Mean annual precipitation--225 to 375 mm
Mean annual air temperature--2.0 to 6.0 degrees C.
Frost-free period--40 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained, 1.5-5.0 um/sec.
USE AND VEGETATION: Bruner soils are primarily used for grazing. The potential native vegetation is needle and thread, Indian ricegrass, Sandberg bluegrass, basin big sagebrush, and other grasses and forbs.
DISTRIBUTION AND EXTENT: Bruner soils are of small extent in southwestern Wyoming. MLRA 13.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Lincoln County, Wyoming, 2020. The Bruner series name is derived from a local landmark.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon--0 to 3 cm (A horizon)
Cambic horizon--3 to 29 cm (Bw and Bk horizons)
Secondary carbonates--16 to 200 cm (Bk, BCk, and C horizons)
Particle-size control section--25 to 100 cm (Bk, BCk, and part of C horizon)
Bruner soils have a frigid temperature regime and a xeric moisture regime.
Taxonomic version: Twelfth edition, 2014
National Cooperative Soil Survey
U.S.A.