LOCATION CANYONSPRING CA
Established Series
PBF/RLR/JTW
01/2020
CANYONSPRING SERIES
The Canyonspring series consists of shallow, well-drained soils that formed in residuum and colluvium weathered from gneiss and granitoid rock. The Canyonspring soils are on mountain slopes. Slopes range from 9 to 35 percent. The mean annual precipitation is about 435 millimeters and the mean annual air temperature is about 8.5 degrees C.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Argixerolls
TYPICAL PEDON: Canyonspring cobbly loam, on a northwest facing, linear to slightly convex, 15 percent slope under sagebrush and scattered Pinyon pine and mountain mahogany at an elevation of 2,115 meters. (Colors are for dry soil unless otherwise noted.) The surface is covered by approximately 10 percent gravel, 10 percent cobbles and 10 percent stones.
A1 -- 0 to 13 centimeters; dark grayish brown (10YR 4/2) cobbly loam, very dark grayish brown (10YR 3/2) moist; moderate fine subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; common fine roots throughout; 10 percent gravel and 10 percent cobbles; neutral (pH 6.8); abrupt smooth boundary. (8 to 15 centimeters)
A2 -- 13 to 22 centimeters; dark grayish brown (2.5Y 4/2) loam, very dark grayish brown (2.5Y 3/2) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; common fine and medium roots throughout; 5 percent gravel and 5 percent cobbles; slightly acid (pH 6.4); abrupt wavy boundary. (0 to 15 centimeters)
Bt -- 22 to 33 centimeters; dark grayish brown (2.5Y 4/2) cobbly clay loam, very dark grayish brown (2.5Y 3/2) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; common fine, medium and coarse roots throughout; few faint clay films on ped faces; 10 percent gravel and 5 percent cobbles; slightly acid (pH 6.4); abrupt smooth boundary. (8 to 40 centimeters)
Cr -- 33 to 67 centimeters; moderately cemented gneiss bedrock.
TYPE LOCATION: San Bernardino County, California; 685 meters east and 305 meters south of the NW corner of section 16, T. 2 N., R. 2 E.; 34.2621389 degrees latitude, -116.7794444 degrees longitude, WGS84; UTM Zone 11, 0520304e 3791243n; U.S.G.S. Quad Name: Big Bear City, California.
RANGE IN CHARACTERISTICS:
Soil moisture control section: Usually dry in all parts from late May or early June until late November or early December, and usually moist in some or all parts the rest of the year.
Soil temperature: 8 to 12 degrees C.
Organic matter: 1 to 3 percent
Surface rock fragments: 15 to 45 percent; with 5 to 25 percent gravel, 0 to 10 percent cobbles and 0 to 10 percent stones
Control section
Thickness of the mollic epipedon: 20 to 50 centimeters
Depth to paralithic contact: 25 to 50 centimeters
Rock fragments: 5 to 20 percent
Clay content: 18 and 27 percent
A horizon
Dry color: 10YR or 2.5Y 4/2, 4/3, 3/2, 3/3
Moist color: 10YR or 2.5Y 2/2, 3/2, 3/3
Texture: loam
Clay content: 16 to 27 percent
Rock fragments: 5 to 25 percent gravel and cobbles
Reaction: slightly acid or neutral
Bt horizon
Dry color: 10YR or 2.5Y 4/2, 4/3, 5/3, 5/4
Moist color: 10YR or 2.5Y 3/2, 3/3, 4/3, 4/4
Texture: loam or clay loam
Clay content: 22 to 35 percent
Rock fragments: 5 to 25 percent gravel and cobbles
Reaction: moderately acid to neutral
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landscape: mountains
Landform: mountain slopes
Slopes: 9 to 30 percent
Parent material: mixed residuum and colluvium from granitoid and gneiss
Elevation: 1,325 to 2,305 meters
Climate: subhumid mesothermal with warm, dry summers and cool, moist winters with some snow
Mean annual precipitation: 400 to 825 millimeters
Mean annual air temperature: 8 to 10 degrees C.
Frost-free season: 85 to 135 days.
GEOGRAPHICALLY ASSOCIATED SOILS:
Deadmansridge soils: have a loamy-skeletal particle-size control class and are on similar positions on mountain slopes.
Deadpan soils: have a mollic epipedon that is more than 50 centimeters thick and are formed in alluvial or colluvium at the base of slopes and alluvial fans.
Garloaf soils: have an argillic horizon with greater than 35 percent rock fragments and are on alluvial fans.
Runningsprings soils: are 25 to 50 centimeters to paralithic contact of granitoid bedrock and are on similar positions of mountain slopes.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well-drained; moderate or moderately slow saturated hydraulic conductivity.
USE AND VEGETATION: Canyonspring soils are used for recreation, watershed and wildlife habitat. Some areas are used for homesites. The present vegetation is mainly sagebrush, Pinyon pine and mountain mahogany.
DISTRIBUTION AND EXTENT: Inland mountain ranges in Southern California Coastal Plains and Mountains, MLRA 19. These soils are of small extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California.
SERIES ESTABLISHED: San Bernardino Mountains, San Bernardino County, California, 2004.
REMARKS: Diagnostic horizons and features recognized in the pedon are:
Mollic epipedon: the zone from 0 to 33 centimeters (A1, A2 horizons)
Argillic horizon: the zone from 22 to 33 centimeters (Bt horizon)
Paralithic contact: at a depth of 33 centimeters (Cr horizon)
Paralithic materials: the zone from 33 to 67 centimers (Cr horizon)
Particle-size control section: the zone from 0 to 33 centimeters.
The name is from a spring in the soil survey area.
ADDITIONAL DATA:
NASIS User Site ID:2004CA071030
NASIS User Pedon ID: ca777-6874-46-B
Classified using the Twelfth Edition of Keys to Soil Taxonomy (2014)
National Cooperative Soil Survey
U.S.A.