LOCATION CAMASPATCH WA+OR
Established Series
Rev. RLS/RJE/KWH/RWL
09/2019
CAMASPATCH SERIES
Landscape--canyonlands, plateaus, hills
Landform--ridges, hillslopes, structural benches, canyons
Slope--0 to 70 percent
Parent material--loess, colluvium and residuum derived from basalt
Mean annual precipitation--about 380 mm
Mean annual air temperature--about 9 degrees C
Depth class--shallow
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Clayey-skeletal, smectitic, mesic Lithic Argixerolls
TYPICAL PEDON: Camaspatch very cobbly silt loam in an area of grassland, on a structural bench that has a slope of 3 percent (All textures are apparent field textures.)
A--0 to 8 cm; very cobbly silt loam, dark gray (10YR 4/1) dry, very dark brown (10YR 2/2) moist; moderate medium and thick platy structure; hard, firm, slightly sticky and slightly plastic; few very fine and fine roots; few very fine tubular pores; 20 percent gravel and 30 percent cobbles; 2 percent of surface covered with cobbles; slightly acid (pH 6.4); clear smooth boundary
Bt1--8 to 15 cm; very gravelly silty clay loam, dark grayish brown (10YR 4/2) dry, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; very hard, very firm, sticky and plastic; few very fine and fine roots; few very fine tubular pores; few faint clay films lining pores; 30 percent gravel and 10 percent cobbles; neutral (pH 6.8); clear smooth boundary
Bt2--15 to 38 cm; very gravelly clay, brown (10YR 5/3) dry, brown (10YR 4/3) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; very hard, very firm, very sticky and very plastic; few very fine and fine roots; few very fine tubular pores; many prominent clay films on faces of peds and in pores; 35 percent gravel and 10 percent cobbles; neutral (pH 6.8); gradual smooth boundary
Bt3--38 to 46 cm; very gravelly clay, brown (7.5YR 4/4) dry, brown (7.5YR 4/3) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; very hard, very firm, very sticky and very plastic; few very fine and fine roots; few very fine tubular pores; many prominent clay films on faces of peds and in pores; 50 percent gravel; neutral (pH 6.8); abrupt smooth boundary
R--46 cm; fractured basalt
TYPE LOCATION: Yakima County, Washington, about 34 km south-southwest of Toppenish; about 550 m north and 275 m west of the southeast corner of section 13, T. 7 N., R. 18 E., Willamette Meridian
RANGE IN CHARACTERISTICS:
Mean annual soil temperature at the lithic contact--8 to 11 degrees C
Soil moisture--dry in all parts 90 to 105 consecutive days in summer, moist in winter and spring
Depth to lithic contact--30 to 50 cm
Particle-size control section--averages 35 to 50 percent clay and 35 to 80 percent rock fragments
Thickness of mollic epipedon--18 to 38 cm, includes part or all of argillic horizon
Reaction--6.1 to 7.3 throughout
A horizon
Hue--10YR, 7.5YR
Value--3 to 5 dry, 2 or 3 moist
Chroma--1, 2, or 3 dry or moist
Texture--very cobbly loam, very cobbly silt loam, cobbly loam, very stony clay loam
Thickness--5 to 10 cm
Bt horizon
Hue--10YR, 7.5YR
Value--3 to 6 dry, 2 to 4 moist
Chroma--2 to 4 dry or moist
Texture of fine-earth fraction--silty clay loam or clay loam in upper part; silty clay or clay in lower part
Textural modifier--very gravelly, very cobbly, extremely gravelly
Combined thickness--18 to 50 cm
COMPETING SERIES:
Gwinly--dry 60 to 80 consecutive days following summer solstice
Laufer--dry 80 to 90 consecutive days following summer solstice
Lorella--25 to 50 cm (shallow) to a lithic contact (volcanic tuff); dominantly volcanic tuff fragments in particle-size control section; stress-oriented material in Bt horizon; pH of argillic horizon ranges to 8.4
Radec--dry 60 to 90 consecutive days following summer solstice
Waterbury--50 to 60 percent clay in particle-size control section
GEOGRAPHIC SETTING:
Elevation--580 to 1280 m
Climate--warm, dry summers; cool, moist winters
Mean annual precipitation--310 to 460 mm
Mean January air temperature--about -4 degrees C
Mean July air temperature--about 21 degrees C
Mean annual air temperature--7 to 10 degrees C
Frost-free season--80 to 170 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Badge--on hillslopes; loamy-skeletal particle-size class
Fortyday--on ridges; loamy-skeletal particle-size class
Lickskillet--on uplands; loamy-skeletal particle-size class
McDaniel--on uplands; no lithic contact within more than 150 cm; loamy-skeletal particle-size class
Pumphouse--on ridges and plateaus; fine-loamy particle-size class
Rock Creek--on plateaus; ochric epipedon
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately high
USE AND VEGETATION:
Use--domestic livestock grazing
Vegetation--mainly Sandberg bluegrass, Douglas eriogonum, and narrowleaf goldenweed; minor amount of bluebunch wheatgrass and Idaho fescue
DISTRIBUTION AND EXTENT: Central Washington; MLRA 8; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Yakima Training Center, Yakima County, Washington; 1994
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Mollic epipedon--zone from the surface to a depth of 18 cm (mixed)
*Argillic horizon--zone from 8 to 46 cm
*Depth to lithic contact--46 cm
*Particle-size control section--zone from 8 to 46 cm
National Cooperative Soil Survey
U.S.A.