LOCATION BUZZPEAK CA

Established Series
RLR/KP
06/2016

BUZZPEAK SERIES

The Buzzpeak series consists of deep, somewhat excessively drained soils that formed in residuum colluvium and slope alluvium from sandstone or conglomerate. Buzzpeak soils are on hills and mountains. Slopes range from 5 to 90 percent. The mean annual precipitation is about 14 inches (355 mm) and the mean annual temperature is about 62 degrees F (17 degrees C).

TAXONOMIC CLASS: Sandy, mixed, thermic Typic Haploxerepts

TYPICAL PEDON: Buzzpeak, on a south facing slope under a cover of coastal sage at an elevation of 371 meters. When described the soil was dry throughout. (Colors are for dry soil unless otherwise noted).

A--0 to 13 cm, (0.0 to 5.1 inches); dark yellowish brown (10YR 4/4) gravelly sandy loam, brown (10YR 4/3) moist; weak fine granular structure; soft, very friable, nonsticky, nonplastic; common fine roots throughout; many very fine low continuity interstitial pores; 5 percent subrounded indurated 76 to 250 millimeter sandstone fragments and 10 percent subangular indurated 2 to 5 millimeter sandstone fragments and 10 percent subangular indurated 6 to 75 millimeter sandstone fragments; moderately acid, pH 6.0 by Hellige-Truog; abrupt wavy boundary.

Bw1--13 to 34 cm, (5.1 to 13.4 inches); yellowish brown (10YR 5/4) gravelly sandy loam, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; soft, friable, nonsticky, nonplastic; common very fine roots and common fine roots throughout; common very fine interstitial pores; 1 percent subrounded indurated 76 to 250 millimeter sandstone fragments and 10 percent subangular indurated 2 to 5 millimeter sandstone fragments and 10 percent subangular indurated 6 to 75 millimeter sandstone fragments; moderately acid, pH 6.0 by Hellige-Truog; clear wavy boundary.

Bw2--34 to 44 cm, (13.4 to 17.3 inches); dark yellowish brown (10YR 4/4) gravelly loamy sand, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; soft, friable, nonsticky, nonplastic; common very fine roots throughout; common very fine interstitial pores; 1 percent subrounded indurated 76 to 250 millimeter sandstone fragments and 7 percent subangular indurated 2 to 5 millimeter sandstone fragments and 8 percent subangular indurated 6 to 75 millimeter sandstone fragments; slightly acid, pH 6.5 by Hellige-Truog; clear wavy boundary.

C1--44 to 61 cm, (17.3 to 24.0 inches); brownish yellow (10YR 6/6) gravelly sand, yellowish brown (10YR 5/6) moist; single grain; loose, loose, nonsticky, nonplastic; common very fine roots throughout and common medium roots throughout; common very fine interstitial pores; 1 percent subangular indurated 76 to 250 millimeter sandstone fragments and 10 percent subangular indurated 6 to 75 millimeter sandstone fragments and 20 percent subangular indurated 2 to 5 millimeter sandstone fragments; slightly acid, pH 6.5 by Hellige-Truog; clear wavy boundary.

C2--61 to 117 cm, (24.0 to 46.1 inches); brownish yellow (10YR 6/6) very gravelly sand, yellowish brown (10YR 5/4) moist; single grain; loose, loose, nonsticky, nonplastic; common very fine roots throughout; common very fine interstitial pores; 5 percent subrounded indurated 75 to 250 millimeter sandstone fragments and 18 percent subrounded indurated 6 to 75 millimeter sandstone fragments and 20 percent rounded indurated 2 to 5 millimeter sandstone fragments; slightly acid, pH 6.5 by Hellige-Truog; abrupt smooth boundary.

Cr--117 to 203 cm, (46.1 to 79.9 inches); weakly cemented conglomerate sandstone with cracks >10cm apart.

TYPE LOCATION: Los Angeles County, Buzzard Peak on steep sideslope of NW finger midslope above landslide, 34 degrees, 3 minutes, 33 seconds and 117 degrees, 50 minutes North latitude, 53 seconds West longitude, NAD83 - U.S.G.S Quad: San Dimas

RANGE IN CHARACTERISTICS:

The MAST at a depth of 20 inches is 60 to 66 degrees F.
The soil temperature usually does not go below 47 degrees F.
The soil becomes moist below a depth of about 12 inches some time from October to December and remains moist in some part between depths of about 12 to 35 inches until April or May.

Rock fragments make up 5 to 35 percent by volume.
Depth to paralithic materials is 100 to 150 centimeters.
Clay content ranges from 1 to 8 percent.
The soils are slightly acidic to neutral and do not contain calcium carbonate.
Rock fragments on the surface range from 0 to 30 percent gravel.

The particle size control section averages 1 to 7 percent clay and 5 to 35 percent rock fragments. Textures in the particle-size control section are sands and loamy sands often with coarse fragment modifiers.

A horizon:
Dry Color: hue of 2.5Y or 10YR; value of 4 to 6, chroma of 3 to 4
Moist Color: hue of 2.5Y or 10YR; value of 3 or 4, chroma of 2 to 4
Texture - sandy loam, gravelly sandy loam, loamy sand, gravelly loamy sand, gravelly sand
Coarse Fragments are usually 5-35 percent

Bw horizon:
Dry Color: hue of 2.5Y or 10YR, value of 4 to 6, chroma of 4 to 6
Moist Color: hue of 2.5Y or 10YR, value of 4 to 6, chroma of 4 to 6
Texture - gravelly loamy sand, gravelly sand, gravelly sandy loam, loamy sand, sand, sandy loam
Coarse Fragments are usually 5-35 percent

C horizon:
Dry Color: hue of 2.5Y or 10YR, value of 5 to 6, chroma of 4 to 6
Moist Color: hue of 2.5Y or 10YR, value of 4 to 6, chroma of 4 to 6
Texture - gravelly sand, very gravelly sand, gravelly loamy sand, very gravelly loamy sand, loamy sand, sand
Coarse Fragments are usually 1-5 percent
Redoximorphic Features - iron concentrations in with slightly higher value and/or chroma (where present)

Cr horizon: Weathered sandstone or conglomerate mass

COMPETING SERIES: There are no other series in this family.

GEOGRAPHIC SETTING: Buzzpeak soils are on sideslopes and crests of hills and mountains. Slopes are 5 to 90 percent. These soils formed in residuum colluvium and slope alluvium weathered from sandstone or conglomerate. Elevation is 200 to 500 meters (656 to 1640 feet). Mean annual precipitation is 280 to 833 millimeters (11 to 33 inches). The mean annual temperature is 15 to 17 degrees C (56 to 65 degrees F). Frost free season is 355 to 365 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Soper, Agua Dulce, and Tujunga soils. The Agua Dulce and Soper soils have an argillic horizon. The Tujunga soil does not have a cambic and paralithic contact.

DRAINAGE AND PERMEABILITY: Somewhat excessively drained; high runoff; rapid permeability. The soils are not flooded or ponded for any part of the water year. Depth to water table is >2 meters.

USE AND VEGETATION: This soil is dominantly open land and used for recreation. Vegetation is chaparral.

DISTRIBUTION AND EXTENT: The series is not extensive in MLRA 20.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California

SERIES PROPOSED: Los Angeles County, California, 2010.

REMARKS:
Particle Size Control Section for this pedon:
25 to 100 cm. (10 to 40 in)
Diagnostic horizons and features recognized in this pedon are:
Ochric Epipedon 0.0 to 5.1 in. (0 to 13 cm)
Cambic Horizon 5.1 to 13.4 in. (13 to 34 cm)
Paralithic Materials 46.1 to 78.7 in (117 to 200 cm)
Paralithic Contact 46.1 to 78.7 in (117 to 200 cm)

National Cooperative Soil Survey
U.S.A.