LOCATION SLIDELAND CAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Haplic Palexeralfs
TYPICAL PEDON: Slideland gravelly loam, on a west facing 11 percent slope under a cover of annual grasses and forbs with some scattered blue oak and whiteleaf manzanita at an elevation of 620 feet, (189 m). When described on 7/8/99 the soil was dry to 38 inches, (97 cm) and very slightly moist to 80 inches, (203 cm). (Colors are for dry soil unless otherwise noted).
A--0 to 2 inches, (0 to 5 cm); light brown (7.5YR 6/4) gravelly loam, brown (7.5YR 4/3) moist; 23 percent clay; moderate medium platy parting to moderate fine and medium granular structure; slightly hard, friable, slightly sticky, slightly plastic; many very fine roots; common very fine, fine and medium irregular and tubular pores; 15 percent gravel; slightly acid, pH 6.3 by Hellige-Truog; abrupt smooth boundary. (2 to 5 inches, (5 to 13 cm) thick)
Bt1--2 to 9 inches, (5 to 23 cm); light brown (7.5YR 6/4) gravelly loam, brown (7.5YR 4/3) moist; 25 percent clay; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; many very fine and fine roots and few medium roots; common very fine and fine tubular and few medium tubular pores; 70 percent continuous distinct clay films on surfaces along pores; 15 percent gravel; slightly acid, pH 6.5 by Hellige-Truog; gradual smooth boundary.
Bt2--9 to 14 inches, (23 to 36 cm); light brown (7.5YR 6/4) gravelly clay loam, brown (7.5YR 4/3) moist; 28 percent clay; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; common very fine and fine roots and few medium roots; many very fine, fine and medium tubular pores; 70 percent continuous distinct clay films on surfaces along pores; 15 percent gravel; slightly acid, pH 6.5 by Hellige-Truog; gradual smooth boundary.
Bt3--14 to 21 inches, (36 to 53 cm); light reddish brown (5YR 6/4) gravelly clay loam, reddish brown (5YR 4/3) moist; 31 percent clay; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; common very fine and fine roots and few medium roots; many very fine, fine and medium tubular pores; 80 percent continuous distinct clay films on surfaces along pores; 15 percent gravel; slightly acid, pH 6.5 by Hellige-Truog; gradual smooth boundary.
Bt4--21 to 28 inches, (53 to 71 cm); light reddish brown (5YR 6/4) gravelly clay loam, reddish brown (5YR 4/3) moist; 34 percent clay; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; few very fine, fine, medium and coarse roots; many very fine, fine and medium tubular pores; 80 percent continuous distinct clay films on surfaces along pores; 15 percent gravel; neutral, pH 6.7 by Hellige-Truog; gradual smooth boundary.
Bt5--28 to 38 inches, (71 to 97 cm); light reddish brown (5YR 6/4) gravelly clay loam, reddish brown (5YR 4/3) moist; 36 percent clay; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; few very fine, fine and medium roots; many very fine, fine and medium tubular pores; 80 percent continuous distinct clay films on surfaces along pores; 15 percent gravel; neutral, pH 6.7 by Hellige-Truog; gradual smooth boundary.
Bt6--38 to 51 inches, (97 to 130 cm); light reddish brown (5YR 6/4) gravelly clay loam, reddish brown (5YR 4/3) moist; 37 percent clay; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; few very fine, fine, medium and coarse roots; many very fine and fine tubular and few medium tubular pores; 80 percent continuous distinct clay films on surfaces along pores; 5 percent cobbles and 10 percent gravel; neutral, pH 6.7 by Hellige-Truog; gradual smooth boundary.
Bt7--51 to 69 inches, (130 to 175 cm); light reddish brown (5YR 6/4) very cobbly clay loam, reddish brown (5YR 4/3) moist; 39 percent clay; moderate fine and medium subangular blocky structure; slightly hard, friable, very sticky, very plastic; few very fine, fine and medium roots; common very fine and fine tubular pores; 100 percent continuous distinct clay films on surfaces along pores; 5 percent stones, 15 percent gravel, and 15 percent cobbles; neutral, pH 6.7 by Hellige-Truog; gradual smooth boundary.
Bt8--69 to 80 inches, (175 to 203 cm); light brown (7.5YR 6/4) very cobbly clay loam, brown (7.5YR 4/3) moist; 38 percent clay; moderate fine and medium subangular blocky structure; slightly hard, friable, very sticky, very plastic; few very fine, fine and medium roots; common very fine and fine tubular pores; 80 percent continuous distinct clay films on surfaces along pores; 15 percent medium distinct irregular iron-manganese masses with clear boundaries between peds; 5 percent stones, 20 percent cobbles, and 20 percent gravel; neutral, pH 6.8 by Hellige-Truog; (Combined thickness of the Bt horizon is 55 to 78 inches, (140 to 198 cm) or more thick).
TYPE LOCATION: Butte County, California, about 2.4 miles south southwest of Centerville, approximately 2400 feet east and 1000 feet south of the northwest corner of Section 20, Township 22 N., Range 3 E., 39 degrees, 45 minutes, 11 seconds North latitude and 121 degrees, 39 minutes, 56 seconds West longitude, NAD83 - U.S.G.S Quad: Paradise West, California.
RANGE IN CHARACTERISTICS: Depth to bedrock is greater than 60 inches, (152 cm). The mean annual soil temperature is 59 to 65 degrees F, (15 to 18 degrees C). The particle-size control section averages 25 to 35 percent clay and 5 to 35 percent rock fragments, mostly gravel. Mineralogy is mixed. Rock fragments on the surface range from 0 to 10 percent gravel, 0 to 10 percent cobbles, 0 to 10 percent stones and 0 to 10 percent boulders. In some pedons the clay content ranges from 20 to 35 percent in the lower Bt horizon.
The A horizon dry color is 7.5YR 5/3, 6/3 or 6/4. Moist color is 7.5YR 4/2, 4/3, 4/4 or 5YR 4/3. Texture is loam, gravelly loam, fine sandy loam or very fine sandy loam. Clay content ranges from 18 to 27 percent. Rock fragments range from 2 to 30 percent gravel. Reaction ranges from slightly acid to neutral.
The upper Bt horizon dry color is 7.5YR 5/3, 5/4, 6/3, 6/4, 6/6, 7/4, 5YR 5/4 or 6/4. Moist color is 7.5YR 4/3, 4/4, 5YR 4/3 or 4/4. Texture is loam, gravelly loam, clay loam, gravelly clay loam, cobbly clay loam, silt loam or silty clay loam. Clay content ranges from 20 to 35 percent. Rock fragments range from 5 to 30 percent gravel, 0 to 10 percent cobbles and 0 to 5 percent stones. Reaction ranges from moderately acid to neutral.
The lower Bt horizon dry color is 7.5YR 4/4, 5/4, 6/4, 7/4, 5YR 4/6, 5/4 or 6/4. Moist color is 7.5YR 4/3, 4/4, 5/4, 5YR 4/4 or 4/4. Texture is clay loam, gravelly clay loam, cobbly clay loam, very cobbly clay loam, silty clay loam, very gravelly silty clay loam, very cobbly silty clay loam, clay, gravelly clay, cobbly clay, silty clay or gravelly silty clay. Clay content ranges from 35 to 50 percent. Rock fragments range from 5 to 30 percent gravel, 0 to 25 percent cobbles and 0 to 5 percent stones. Reaction ranges from slightly acid to slightly alkaline.
COMPETING SERIES: There are no other series in this family.
GEOGRAPHIC SETTING: Slideland soils are on terraces and rotational landslide deposits in canyons in Cascade foothills. Slopes range from 3 to 50 percent. These soils formed in alluvium and colluvium weathered from mixed rocks. Elevation is 420 to 2000 feet, (128 to 610 m). Mean annual precipitation is 30 to 60 inches, (762 to 1524 mm). The mean annual temperature is 56 to 60 degrees F, (13 to 16 degrees C). Frost free season is 215 to 260 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chinacamp and Coalcanyon soils. The Chinacamp and Coalcanyon soils are loamy-skeletal and formed in weathered talus.
DRAINAGE AND PERMEABILITY: Well drained; low to medium runoff; moderate to moderately rapid saturated hydraulic conductivity in the A horizon, moderate to moderately slow in the upper Bt horizon and moderate slow to slow in the lower Bt horizon.
USE AND VEGETATION: This soil is used for watershed, wildlife habitat and home site development. Vegetation is California black oak, canyon live oak, bigleaf maple, ponderosa pine, valley oak, blue oak, foothill pine, whiteleaf manzanita, toyon, deerbrush, California laurel, Pacific poison oak, California buckthorn, and annual grasses and forbs.
DISTRIBUTION AND EXTENT: Butte County, California and occur in the M26Fa (Tuscan Flows) subsection of the M261F (Sierra Nevada Foothills) section. MLRA 18 Sierra Nevada Foothills (Cascade part). The soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Butte County, California 2005. Source of name is coined.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - zone from 0 to 2 in, (0 to 5 cm) (A)
Argillic horizon - zone from 9 to 80 in, (23 to 203 cm) (Bt2, Bt3, Bt4, Bt5, Bt6, Bt7, Bt8)
Particle-size control section - zone from 9 to 29 in, (23 to 74 cm)
The soil moisture control section - zone from 7 to 17 inches, (18 to 43 cm) is dry in all parts from about June to October (about 135 days).