LOCATION BURGUNDY CAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, nonacid, thermic Lithic Xerorthents
TYPICAL PEDON: Burgundy extremely gravelly sandy loam on a south facing hill of 78 percent slope at an elevation of 1,447 feet (441 meters). When described on 01/13/2005 the soil was moist throughout. Colors are for dry soils unless otherwise noted.
A1--0 to 1 inches (0 to 3 centimeters); brown (10YR 5/3), extremely gravelly coarse sandy loam, dark brown (10YR 3/3), moist; massive; slightly hard, very friable, slightly sticky and nonplastic; many very fine roots; many fine irregular pores; 65 percent gravel; moderately acid (pH 5.7); Black macrobiotic crust covers 40% of surface; abrupt smooth boundary. (1 to 3 inches, 3 to 7 centimeters thick)
A2--1 to 6 inches (3 to 16 centimeters); brown (10YR 5/3), extremely gravelly coarse sandy loam, dark brown (10YR 3/3), moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and nonplastic; many very fine roots; many medium irregular pores; 65 percent gravel; moderately acid (pH 6.0); abrupt smooth boundary. (2 to 5 inches, 6 to 13 centimeters thick)
R--6 to 7 inches (16 to 18 centimeters); hard, massive rhyolite bedrock, fractured at intervals of <4inches (10 centimeters).
TYPE LOCATION: San Benito County, California, about 0.5 mile (0.8 kilometer) along the High Peaks Trail west of the Chalone Creek Maintenance Station; 1,574 feet north and 2,462 feet west of the southeast corner of section 35, T 16S, R 7E; USGS North Chalone Peak, California topographic quadrangle; 36 degrees 29 minutes 32.90 seconds north latitude and 121 degrees 10 minutes 39.00 seconds west longitude; UTM 663236 meters E, 4040114 meters N, zone 10.
RANGE IN CHARACTERISTICS:
Depth to bedrock: 4 to 10 inches (9 to 25 centimeters)
Mean annual soil temperature: 71 to 76 degrees F (22 to 24 degrees C).
Soil moisture control section: dry in all parts from about May 15 to November 15 (180 days), and moist in all parts from about January 15 to April 15 (about 90 days).
Particle size control section: 10 to 15 percent clay, 40 to 70 percent rock fragments mostly gravel from rhyolite.
A horizon(s):
Hue: 10YR
Value: 5, 6 dry; 2, 3, 4 moist
Chroma: 2, 3 dry; 2, 3 moist
Texture of the fine earth fraction: Coarse sandy loam
Clay content: 10 to 15 percent
Rock fragments: 40 to 70 percent gravel
Reaction: very strongly acid to slightly alkaline
Base saturation by ammonium acetate: 70 %
COMPETING SERIES: These are the Hideaway, Ranchoseco, and Reliz soils. Hideaway soils are stony or very stony, have more than 18 percent clay. Ranchoseco soils have 15 to 25 percent clay, have hues of 7.5YR and 5YR in the Bw horizon, and have a lithologic discontinuity at the upper boundary of the R horizon.
GEOGRAPHIC SETTING: The Burgundy soils are on backslopes of hills. Slopes range from 35 to 75 percent. These soils formed in residuum weathered from rhyolitic breccia. Elevation is 984 to 2,395 feet (300 to 730 meters). The climate is characterized by hot, dry summers and cool, moist winters. The mean annual precipitation is 17 to 19 inches (432 to 483 millimeters), and the mean annual air temperature is about 59 to 63 degrees F (15 to 17 degrees C). The frost free season is 190 to 210 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chalone, Highpeaks and Knuckle soils. The Chalone soils are 20 to 40 inches (50 to 100 cm) deep to bedrock and are on hills under mixed chaparral. The Highpeaks soils are 10 to 20 inches (25 to 50 cm) deep to bedrock and are on hills under mixed chaparral. The Knuckle soils are in the sandy-skeletal family and are 10 to 20 inches (25 to 50 cm) deep to bedrock and are on hills under Chamise chaparral.
DRAINAGE AND PERMEABILITY: Well drained, rapid permeability, very high runoff. They do not flood or pond.
USE AND VEGETATION: This soil is used for watershed, wildlife habitat and recreation. Vegetation is mixed chaparral.
DISTRIBUTION AND EXTENT: San Benito County, California in MLRA 15 -- Central California Coast Range. These soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: San Benito County, California. Source of name: landmark rock spires in Pinnacles National Monument. This series was established based on limited acreage observed within the National Park Service Pinnacles National Monument boundary.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Ochric Epipedon: the zone from 0 to 6 inches (0 to 16 cm) (A1 and A2 horizons)
Lithic Contact: the zone from 6 to 7 inches (16 to 18 cm) or more (R horizon)
ADDITIONAL DATA:
Pedon information for this type location only:
Pedon Type: typical pedon for series Lab Source ID: NSSL
Pedon Purpose: research site Lab Pedon #: 06N0209