LOCATION EAGLEREST CA
Established Series
Rev. BRY/KDA/KP/MRS
09/2013
EAGLEREST SERIES
The Eaglerest series consists of shallow, well drained soils. These soils formed in residuum consisting of weathered shale. Eaglerest soils are on mountain slopes. Slope is 15 to 50 percent. The mean annual precipitation is about 254 millimeters (10 inches) and the mean annual temperature is about 15 degrees C. (59 degrees F.)
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, thermic, shallow Typic Haploxeralfs
TYPICAL PEDON: Eaglerest loam, on an east aspect slope of 19 percent under annual grasses and forbs at an elevation of 960 meters (3,150 feet). (Colors are for dry soil unless otherwise indicated. When described on May 9, 1991, the soil was dry throughout.)
A--0 to 5 centimeters (0 to 2 inches); very pale brown (10YR 7/3) loam, brown (10YR 5/3) moist; moderate medium subangular blocky parting to moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; 10 percent 2 to 75 millimeter gravel; neutral (pH 7.2); abrupt wavy boundary. (5 to 10 centimeters [2 to 4 inches] thick)
Bt1--5 to 15 centimeters (2 to 6 inches); very pale brown (10YR 7/3) very gravelly silt loam, brown (10YR 5/3) moist; strong medium angular blocky structure; hard, friable, sticky and plastic; common very fine roots; common very fine tubular pores; slightly effervescent; carbonates disseminated; many distinct discontinuous clay films on faces of peds and along surface of pores; 30 percent 2 to 75 millimeter gravel and 10 percent 75 to 250 millimeter cobbles; slightly alkaline (pH 7.8); abrupt wavy boundary. (5 to 15 centimeters (2 to 6 inches] thick)
Bt2--15 to 33 centimeters (6 to 13 inches); very pale brown (10YR 7/3) very gravelly silt loam, brown (10YR 5/3) moist; moderate medium subangular blocky structure; slightly hard, friable, sticky and plastic; common very fine roots; few very fine tubular and common very fine interstitial pores; many distinct discontinuous clay films bridging sand grains and along surface of pores; slightly effervescent; carbonates disseminated; 30 percent 2 to 75 millimeter gravel and 10 percent 75 to 250 millimeter cobbles; slightly alkaline (pH 7.8); abrupt wavy boundary. (10 to 20 centimeters [4 to 8 inches] thick)
Cr--33 to 58 centimeters (13 to 23 inches); moderately cemented, slightly fractured shale.
TYPE LOCATION: Kern County, California, Southwest Part; in map unit 640, Bitcreek-Dibble-Eaglerest complex, 15 to 50 percent slopes; in the San Emidio Mountains; in an unsectionalized area about 729 meters (2,390 feet) north and 207 meters (680 feet) west of the northeast corner of section 26; T. 10 N., R. 22 W.; San Bernardino Base and Meridian; latitude 34 degrees 55 minutes 53 seconds north and longitude 119 degrees 11 minutes 24 seconds west; USGS Eagle Rest Peak, California, Quadrangle, NAD83.
RANGE IN CHARACTERISTICS:
Depth to paralithic contact: 25 to 51 centimeters (10 to 20 inches).
About 0 to 20 percent of the surface is covered by 2 to 75 millimeter shale fragments.
A horizon:
Hue: 10YR dry and moist
Value: 7 dry and 5 moist
Chroma: 3 or 4 dry and moist
Texture of the fine earth fraction: loam
Content of clay: 15 to 20 percent
Content of organic matter: 0.75 to 1.5 percent
Reaction: neutral
Content of rock fragments: 5 to 15 percent 2 to 75 millimeter gravel
Bt horizons:
Hue: 10YR dry and moist
Value: 7 dry and 5 moist
Chroma: 3 or 4 dry and moist
Texture of the fine earth fraction: clay loam or silt loam
Content of clay: 20 to 30 percent
Content of organic matter: 0.1 to 1.0 percent
Reaction: slightly alkaline or moderately alkaline
Content of rock fragments: 15 to 40 percent 2 to 75 millimeter gravel and 5 to 15 percent 75 to 250 millimeter cobbles
COMPETING SERIES: This is the
Delphine series. Delphine (MLRA 20) soils formed in residuum derived from schist and are on summits and side slopes of hills on islands with slopes from 30 to 75 percent.
GEOGRAPHIC SETTING: The Eaglerest soils are on mountain slopes at elevations of 356 to 1,583 meters (1,165 to 5,190 feet). The Eaglerest soils formed in residuum consisting of weathered shale. Slope is 15 to 50 percent. The mean annual precipitation is 254 to 356 millimeters (10 to 14 inches) and the mean annual temperature is 14 to 16 degrees C. (57 to 60 degrees F.). The frost-free season is 150 to 225 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bitcreek,
Dibble, Harrisranch, and
Positas soils. Bitcreek soils have a fine-loamy particle size control section with a mollic epipedon and an argillic horizon. Positas and Dibble soils have fine particle size control sections and smectitic mineralogy. Harrisranch soils have a coarse-loamy particle size control section and formed in residuum and colluviums derived from sandstone.
DRAINAGE AND PERMEABILITY: Well drained; very high runoff; moderately high saturated hydraulic conductivity.
USE AND VEGETATION: Used for grazing, recreation, wildlife habitat, and homesite development. Vegetation is wild oats, red stem filaree, lupine, red brome, ripgut brome, California poppy and other annual forbs and grasses.
DISTRIBUTION AND EXTENT: Mountains in the southern most part of the San Joaquin Valley. These soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Kern County, California 2008. Kern County, Southwest Part Soil Survey. Source of name is the USGS Eagle Rest Peak Quadrangle.
REMARKS: Diagnostic horizons and features recognized in the profile are:
Ochric epipedon - 0 to 5 centimeters (0 to 2 inches) (A).
Argillic horizon - 5 to 33 centimeters (2 to 13 inches) (Bt1 and Bt2).
National Cooperative Soil Survey
U.S.A.