LOCATION BEAVOE WY
Tentative Series
Rev. TAG-DMM-RJS
04/2011
BEAVOE SERIES
The Beavoe series consists of very deep, somewhat poorly drained soils that formed in alluvium derived from metamorphic and sedimentary rock. These soils are on fan remnants and stream terraces. Slopes are 0 to 3 percent. Mean annual precipitation is about 430 mm and mean annual air temperature is about 1 degree C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Oxyaquic Argicryolls
TYPICAL PEDON: Beavoe loam, in irrigated pastureland (colors are for dry soil unless otherwise noted).
A--0 to 10 cm; very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; weak fine granular structure; slightly hard, friable, slightly sticky, slightly plastic; many fine and common medium roots; many fine interstitial pores; 10 percent gravel; neutral (pH 7.2); clear smooth boundary. (10 to 20 cm thick)
Bt1--10 to 27 cm; dark brown (10YR 3/3) very gravelly loam, very dark grayish brown (10YR 3/2) moist; moderate fine subangular blocky structure; moderately hard, firm, slightly sticky, slightly plastic; common fine and medium roots; many fine tubular pores; 5 percent faint clay films on all faces of peds; 30 percent gravel, 10 percent cobbles; slightly alkaline (pH 7.4); clear smooth boundary. (15 to 30 cm thick)
Bt2--27 to 60 cm; brown (7.5YR 5/4) very gravelly sandy clay loam, brown (7.5YR 4/4) moist; moderate fine and medium subangular blocky structure; moderately hard, firm, slightly sticky, slightly plastic; common fine and medium roots; many fine tubular pores; 10 percent distinct clay films on all faces of peds; 40 percent gravel, 10 percent cobbles, 2 percent stones; slightly alkaline (pH 7.4); clear smooth boundary. (20 to 40 cm thick)
BCk1--60 to 110 cm; brown (7.5YR 5/4) extremely gravelly loamy sand, brown (7.5YR 4/4) moist; weak very fine subangular blocky structure; soft, loose, nonsticky, nonplastic; common fine roots; common fine tubular pores; 5 percent manganese masses and 10 percent masses of oxidized iron redox concentrations in matrix; 30 percent distinct carbonate coats on bottom surfaces of rock fragments, and 5 percent carbonate masses in matrix; 50 percent gravel, 10 percent cobbles, 5 percent stones; strongly effervescent (4 percent calcium carbonate equivalent); slightly alkaline (pH 7.6); gradual wavy boundary. (40 to 90 cm thick)
BCk2--110 to 200 cm; strong brown (7.5YR 5/6) extremely gravelly loamy sand, strong brown (7.5YR 4/6) moist; single grain; soft, loose, nonsticky, nonplastic; few very fine roots; common fine tubular pores; 5 percent masses of oxidized iron redox concentrations in matrix; 5 percent distinct carbonate coats on bottom surfaces of rock fragments; 50 percent gravel, 10 percent cobbles, 5 percent stones; slightly effervescent (2 percent calcium carbonate equivalent); slightly alkaline (pH 7.6).
TYPE LOCATION: Sublette County, Wyoming; located approximately 292 feet north and 2,485 feet east of the southwest corner of section 9, T 35N, R 113W; USGS Kismet Peak, Wyoming topographic quadrangle; 43 degrees 0 minutes 43.00 seconds north latitude and 110 degrees 20 minutes 36.00 seconds west longitude.
RANGE IN CHARACTERISTICS:
Soil temperature - 1.5 to 4.0 degrees C.
mollic epipedon thickness - 25 to 40 cm
Depth to argillic horizon - 10 to 20 cm
Depth to secondary calcium carbonate accumulation - 45 to 80 cm
Depth to redoximorphic features - 45 to 90 cm
A horizon
Value: 3 or 4 dry; 2 or 3 moist
Chroma: 2 or 3; dry or moist
Clay content: 10 to 20 percent
Rock fragments: 5 to 15 percent gravel
Reaction: pH 6.6 to 7.3
Bt1 horizon
Hue: 10YR or 7.5YR; dry or moist
Value: 3 or 4 dry; 2 or 3 moist
Chroma: 2 or 3; dry or moist
Texture: sandy clay loam, loam, clay loam
Clay content: 20 to 30 percent
Rock fragments: 35 to 60 percent--25 to 45 percent gravel; 5 to 15 percent cobbles; 0 to 5 percent stones
Reaction: pH 6.8 to 7.4
Bt2 horizon
Hue: 10YR or 7.5YR; dry or moist
Value: 4 or 5; dry or moist
Chroma: 4 or 6; dry or moist
Texture: sandy clay loam, loam, clay loam
Clay content: 20 to 30 percent
Rock fragments: 35 to 60 percent--25 to 45 percent gravel; 5 to 15 percent cobbles; 0 to 5 percent stones
Reaction: pH 6.8 to 7.4
BCk1, BCk2 horizon(s)
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 4 or 6; dry or moist
Texture: loamy sand, sand
Clay content: 1 to 10 percent
Rock fragments: 60 to 75 percent--40 to 60 percent gravel; 5 to 15 percent cobbles; 0 to 5 percent stones
Calcium carbonate equivalent: 1 to 5 percent
Reaction: pH 7.5 to 8.0
COMPETING SERIES:
Cowcamp (MT) - do not have secondary calcium carbonate accumulation
Marcel (MT) - do not have secondary calcium carbonate accumulation
GEOGRAPHIC SETTING:
Landform - fan remnants, stream terraces
Elevation - 2280 to 2840 meters
Slope - 0 to 3 percent
Parent Material - alluvium derived from metamorphic and sedimentary rock
Climate - long, cold winters; cool, moist springs; short, cool summers
Mean annual precipitation - 380 to 485 mm with peak periods of precipitation occurring during the spring
Mean annual air temperature - 0.5 to 3.0 degrees C.
Frost-free period - 25 to 45 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; moderate permeability. Seasonal high water table fluctuates between a depth of 45 and 90 centimeters at some time between the months of April and July.
USE AND VEGETATION: Beavoe soils are used for irrigated grass hay and pasture. The potential native vegetation is mainly Garrison creeping foxtail, meadow foxtail, timothy, tufted hairgrass, and other miscellaneous sedges, rushes, and forbs.
DISTRIBUTION AND EXTENT: Beavoe soils are of small extent in southwestern Wyoming. MLRA - 43B.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Sublette County, Wyoming, 2011. The series name is derived from a local landmark.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - from 0 to 27 cm (A, Bt1 horizons)
Argillic horizon - from 10 to 60 cm (Bt1, Bt2 horizons)
Horizons with secondary calcium carbonate accumulation - from 60 to 200 cm (BCk1, BCk2 horizons).
Horizon with redox concentrations - from 60 to 200 (BCk1, BCk2 horizons).
Particle-size control section - from 10 to 60 cm (Bt1, Bt2 horizons).
Beavoe soils have a cryic temperature regime, an ustic moisture regime and an oxyaquic moisture subclass.
Taxonomic version: Eleventh Edition, 2010.
National Cooperative Soil Survey
U.S.A.