LOCATION VENSORA WYEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive Typic Cryaquolls
TYPICAL PEDON: Vensora loam-on a 3 percent slope with native grass and sedge vegetation. (Colors are for moist soil unless otherwise stated.)
A1--0 to 7 inches; very dark brown (10YR 2/2) loam, dark grayish brown (10YR 4/2) dry; moderate coarse granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine, fine, and medium roots; common very fine continuous pores; 5 percent pebbles; neutral (pH 6.8); gradual irregular boundary. (4 to 10 inches thick)
A2--7 to 17 inches; black (10YR 2/1) loam, dark gray (10YR 4/1) dry; few fine prominent yellowish brown (10YR 5/8) moist mottles; moderate medium granular structure; hard, friable, slightly sticky and plastic; many fine and common medium roots; common very fine continuous pores; 5 percent pebbles; neutral (pH 6.8); gradual irregular boundary. (4 to 10 inches thick)
Cg--17 to 30 inches; brown (10YR 4/3) loam, brown (10YR 5/3) dry; common large prominent gray (5Y 5/1) moist mottles; massive; hard, firm, sticky and plastic; few medium roots; common very fine and fine continuous pores; 10 percent cobbles; neutral (pH 7.0); gradual irregular boundary. (0 to 24 inches thick)
2Cg--30 to 60 inches; dark yellowish brown (10YR 4/6) very gravelly sandy clay loam stratified with thin lenses of sandy loam and loam, yellowish brown (10YR 5/6) dry; few thin prominent bands of gray (5Y 5/1) moist mottles, and many medium prominent strong brown (7.5YR 5/8) moist mottles; massive; hard, firm, slightly sticky and slightly plastic; common very fine and fine continuous pores; 30 percent pebbles and 10 percent cobbles; neutral (pH 7.2).
TYPE LOCATION: Albany County, Wyoming; 1,800 feet north, 1,300 feet west of the SE corner of sec. 27, T. 18 N., R. 72 W.
RANGE IN CHARACTERISTICS: Depth to water table ranges from 7 to 30 inches. Thickness of the mollic epipedon ranges from 13 to 19 inches. The mean annual soil temperature is 39 to 42 degrees F., and the mean summer soil temperature is 54 to 57 degrees F. The particle-size control section averages 18 to 35 percent clay, 20 to 65 percent sand, and 10 to 25 percent coarse fragments. Skeletal textures are common within a depth of 40 inches, but they are not coarse enough to meet contrasting criteria.
The A horizon has hue of 10YR or 5Y, value of 3 or 4 dry and 2 or 3 moist, and chroma of 1 through 3 dry and 1 or 2 moist. Reaction is neutral or mildly alkaline.
The Cg horizon has hue 10YR through 5Y, value of 4 through 6 dry and 2 through 5 moist, and chroma of 2 or 3 dry and 1 through 3 moist. Mottles of low and high chroma are common. Texture is commonly loam or gravelly loam, but the range includes clay loam, sandy clay loam, and gravelly sandy clay loam. Reaction is neutral or mildly alkaline.
The 2Cg horizon has hue of 10YR or 7.5YR, value of 4 or 5 dry and moist, and chroma of 2 through 6 dry and 1 through 6 moist. Mottles of low and high chroma are common. Texture is commonly very gravelly sandy clay loam or very gravelly sandy loam. Coarse fragments range from 35 to 55 percent total with 30 to 55 percent pebbles and 0 to 10 percent cobbles. Reaction is neutral or mildly alkaline.
COMPETING SERIES: These are the Blackwell and Furniss series. The Blackwell series is medium acid or slightly acid. The Furniss series has silty textures above 30 inches with less than 15 percent fine or coarser sand.
GEOGRAPHIC SETTING: Vensora soils are on flood plains and in valley fills of mountainous areas. They formed in alluvium derived from mixed sources. Slopes are 0 to 3 percent. Elevation ranges from 7,800 to 9,500 feet. The mean annual precipitation is about 17 inches but ranges from 15 to 19 inches. The mean annual air temperature ranges from 38 to 40 degrees F. The frost-free period is estimated to be less than 60 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Amesmont, Hapjack, Rogert, and Silas soils. Amesmont soils are well drained and moderately deep. Hapjack and Rogert soils are well drained and shallow. Silas soils do not have an aquic moisture regime.
DRAINAGE AND PERMEABILITY: Poorly drained; slow to medium runoff; moderate permeability.
USE AND VEGETATION: Irrigated hayland, rangeland, and wildlife habitat. Native vegetation is tufted hairgrass, Nebraska sedge, and willows.
DISTRIBUTION AND EXTENT: Southeastern Wyoming. This series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Albany County (Albany County Area), Wyoming; 1991.
REMARKS: Diagnostic horizons and features recognized in this pedon are: Mollic epipedon--0 to 17 inches (A1,A2)
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Lakewood MLRA office, without review of the soil series property data. The remainder of this document has not been updated.