LOCATION FREEZEOUT CAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Humic Dystroxerepts
TYPICAL PEDON: Freezeout very gravelly sandy loam - on a northeast facing convex slope of 35 percent under white and red fir at an elevation of 5,670 feet. (When described on September 3, 1980, the soil was dry in all parts. Colors are for dry soil unless otherwise stated.)
0i--1 to 0 inches; decomposed and partially decomposed conifer litter consisting of twigs, bark, needles and cones.
A--0 to 5 inches; dark grayish brown (10YR 4/2) very gravelly sandy loam, very dark brown (10YR 2/2) moist; moderate medium granular structure; soft, very friable, nonsticky and nonplastic; common very fine and fine and few medium and coarse roots; many very fine and fine interstitial pores; 45 percent pebbles and 10 percent cobbles to 125 mm in diameter; medium acid (pH 5.7); clear wavy boundary. (4 to 8 inches thick)
Bw1--5 to 16 inches; brown (10YR 4/3) very gravelly sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; many fine, common medium and few coarse roots; many very fine and fine interstitial pores; 30 percent pebbles and 10 percent cobbles to 125 mm in diameter; medium acid (pH 5.6); gradual wavy boundary. (6 to 12 inches thick)
Bw2--16 to 25 inches; yellowish brown (10YR 5/4) very gravelly sandy loam, dark brown (10YR 4/3) moist; weak fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common very fine and fine roots; many very fine and fine interstitial pores; 40 percent pebbles and 15 percent cobbles to 125 mm in diameter; strongly acid (pH 5.4); abrupt irregular boundary. (8 to 22 inches thick)
R--25 inches; hard, fractured metasedimentary rocks; fractures are one quarter to 1 inch wide and 1 to 5 inches apart; few fine roots in fractures.
TYPE LOCATION: Colusa County, California; 0.5 miles south from the junction of Horse Glade Camp turnoff on road 16N03 on east side of road downslope about 450 feet; 100 feet west, 2,650 feet south of the northeast corner of sec. 2, T. 16 N., R. 8 W.MDB&M, Mendocino National Forest. (This site is about 800 feet east of the Lake County boundary). 39 degrees 15 minutes, 57 seconds North latitude, 122 degrees 43 minutes, 13 seconds West longitude; USGS Fouts Springs CA quadrangle.
RANGE IN CHARACTERISTICS: Thickness of the solum and depth to a lithic contact is 20 to 40 inches. The mean annual soil temperature is 44 degrees to 47 degrees F. The soil temperature exceeds 41 degrees F. from March 15 to November 15 and exceeds 47 degrees F. from April 15 to October 30. The soil is dry in all parts of the moisture control section (12 to 25 inches) from July 25 to October 1 and is moist in all parts from December 15 to May 30. The particle-size control section (10 to 25 inches) ranges from 10 to 18 percent clay. The umbric epipedon is 10 to 20 inches thick. Reaction of the solum is slightly acid through very strongly acid and base saturation ranges from 35 to 50 percent.
The A horizon has dry color of 10YR 5/4, 5/3 or 4/2 and moist color of 10YR 3/3, 3/2 or 2/2. It is a gravelly sandy loam or very gravelly sandy loam. Total rock fragments range from 20 to 55 percent. Stones and cobbles make up 0 to 10 percent and gravel makes up 20 to 45 percent.
The Bw2 horizon has dry color of 10YR 6/4, 6/3, 5/4; 7.5YR 6/4 or 5/4 and moist color of 10YR 5/4, 4/4, 4/3, 3/4; 7.5YR 5/4 or 4/4. It is very gravelly sandy loam, very gravelly loam or extremely gravelly sandy loam. Total rock fragments range from 35 to 80 percent. Stones and cobbles make up 0 to 20 percent and gravel make up 35 to 60 percent.
COMPETING SERIES: These are the Bindle, Goodwin, Nanny and Undusk series and the Smokey series in another family. Bindle soils have a solum that is 20 to 40 percent volcanic ash. Goodwin soils are 40 to 60 inches to a paralithic contact. Nanny and Undusk soils are deeper than 60 inches to bedrock. Smokey soils lack an umbric epipedon and have a paralithic contact.
GEOGRAPHIC SETTING: Freezeout soils are on mountains. Slopes are 30 to 75 percent. The soils formed in material weathered from metasedimentary rocks. Elevations are from 5,000 to 7,060 feet. The climate is subhumid with warm dry summers and cold wet winters. The average annual precipitation is 50 to 70 inches. Snowfall is 40 to 55 inches. Mean January temperature is 30 degrees F.; mean July temperature is 60 degrees F.; mean annual temperature is 44 degrees F. Frost-free season is 80 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bamtush (T), Deadwood, Decy (T), Longdoe (T), Neuns and Yollabolly soils. Bamtush, Deadwood, Decy, Longdoe and Neuns soils are at lower elevations and have mesic soil temperatures. Yollabolly soils are less than 20 inches to a lithic contact.
DRAINAGE AND PERMEABILITY: Well drained; medium to high runoff, moderately rapid permeability.
USE AND VEGETATION: These soils are used primarily for timber production, water supply, and wildlife habitat. Native vegetation is white fir, red fir, Jeffrey pine, incense-cedar, some Douglas-fir, whitethorn ceanothus, and manzanita.
DISTRIBUTION AND EXTENT: High elevations of the Coast Range of Northern California. The series is not extensive. MLRA 5.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Colusa County, California 1983 for the Lake County Soil Survey.
ADDITIONAL DATA: One pedon sampled by NSSL: S80-CA-033-011 (81P-50)
OSED scanned by SSQA.