LOCATION BEAUGHTON CAEstablished Series
TAXONOMIC CLASS: Clayey-skeletal, magnesic, mesic Lithic Argixerolls
TYPICAL PEDON: Beaughton gravelly loam on a smooth south slope of 45 percent under a cover of bunchgrass, scattered Jeffrey pine and incense-cedar at 4,200 feet elevation. (Colors are for dry soil unless otherwise noted). When described, 5/29/80 the soil was dry to 1 inch depth and moist from 1 to 16 inches.
01--1/2 inch to 0; thin scattering of dead bunchgrass and Jeffrey pine needles. (0 to 1 inches thick)
A--0 to 3 inches; brown (7.5YR 4/4) gravelly loam, dark brown (7.5YR 3/2) moist; weak very fine subangular blocky structure breaking to weak fine granular; soft, very friable, nonsticky and slightly plastic; common very fine roots; many very fine interstitial pores; 20 percent pebbles, 5 percent cobbles and stones; mildly alkaline (pH 7.5); clear smooth boundary. (3 to 7 inches thick)
Bt1--3 to 11 inches; reddish brown (5YR 4/4) very cobbly clay loam, dark reddish brown (5YR 3/3) moist; weak to moderate fine subangular blocky structure; slightly hard, very friable, slightly sticky, and plastic; common very fine, fine and medium roots; common very fine tubular and common fine interestitial pores; many thin clay films on peds; 20 percent pebbles, 30 percent cobbles and stones; mildly alkaline (pH 7.5); gradual irregular boundary. (3 to 8 inches thick)
Bt2--11 to 16 inches; strong brown (7.5YR 4/6) extremely cobbly clay, dark reddish brown (5YR 3/4) moist; moderate fine subangular blocky structure; hard friable, sticky and plastic; common very fine, few fine and medium roots; many very fine tubular and common fine interstitial pores; many moderately thick clay film on peds and in pores; 30 percent pebbles, 30 percent cobbles and stones; moderately alkaline (pH 8.0); abrupt irregular boundary. (4 to 9 inches thick)
R--16 to 21 inches; highly fractured, slightly weathered, ultramafic rock.
TYPE LOCATION: Siskiyou County, California, Shasta-Trinity National Forest, about 8 miles west of Weed, about 1,900 feet west and 1,600 feet north of the SE corner of section 3, T 41N., R.6W., about 500 feet ENE of the ford crossing of the West Fork of Parks Creek.
RANGE IN CHARACTERISTICS: The upper 7 inches (or more) of the 3.5 and has greater than 0.7 percent organic carbon in same part. Depth to a lithic contact is 10 to 20 inches. Rock fragments make up 25 to 60 percent of the solum. The soil from a depth of about 5 inches down to bedrock is usually moist in some part for 160 to 180 days from October 15 to May 1. It is dry in all parts for 65 to 90 days from July 1 to September 30. Mean annual soil temperature ranges from 52 to 59 degrees F.
The A horizon has colors of 10YR 5/5, 5/3; 7.5YR 4/2, 4/4; 5YR 3/2, 4/2. Moist colors are 10YR 3/3; 7.5 YR 3/2; 5YR 3/2. It is loam or light clay loam with 25 to 35 percent rock fragments of gravel or cobble size and 18 to 30 percent clay. It is neutral or mildly alkaline.
The Bt horizon has colors of 7.5YR 4/4; 5/4, 5/6, 4/6; 5YR 4/4, 3/2. Moist colors are 5YR 3/3, 3/4; 7.5YR 3/2, 3/4, 4/4. It is clay loam or clay modified by 40 to 60 percent rock fragments and ranges from 35 to 50 percent clay. It is neutral to moderately alkaline. The upper part of the Bt horizon has moist chromas of 3 or less
COMPETING SERIES: There are no other series in this family.
GEOGRAPHIC SETTING: Beaughton soils are on mountains on slopes of 5 to 60 percent. These soils are formed in material weathered from ultramafic rocks. Rock outcrop ranges from 10 to 30 percent. Elevation ranges from 1,500 to 5,500 feet. The climate is subhumid with warm dry summers and cold moist winters.
The mean annual precipitation is 40 to 65 inches. Snow fall is 10 to 20 inches. The mean annual temperature ranges from 50 to 57 degrees F. Mean January temperature is about 31 degrees F.; mean July temperature is 64 degrees F. The average frost-free season is about 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: See Remarks.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; moderately slow permeability.
USE AND VEGETATION: Used mainly for wildlife, watershed and limited grazing. The principal native plants are bunchgrass, mountain mahogany, wedgeleaf ceanothus, scattered Jeffrey pine and incense-cedar.
DISTRIBUTION AND EXTENT: Klamath Mountains of California. The soils of this series are not extensive. Their total acreage is about 5,000 acres.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Klamath National Forest, California, 1982.
REMARKS: There are no other series in this family. This series was established to establish its family in soil taxonomy.
OSED scanned by SSQA. Last revised by state on 8/82.