LOCATION PARKS CAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, magnesic, frigid Typic Haploxerepts
TYPICAL PEDON: Parks series on a west facing slope of 65 percent under white fir, western white pine, Jeffery pine, huckleberry oak, and pinemat manzanita at 6,200 feet elevation. (Colors are for dry soil unless otherwise stated. When described (10/21/80) the soil was moist throughout.)
01--2 inches to 0; fresh, partly decomposed and decomposed conifer needles and huckleberry oak leaves. (0 to 3 inches thick)
A--0 to 5 inches; yellowish red (5YR 4/6) very gravelly sandy clay loam, reddish brown (5YR 4/4) moist; weak fine subangular blocky structure parting to moderate very fine granular; soft, very friable, slightly sticky and slightly plastic; many very fine, few fine, medium and coarse roots; many fine interstitial pores; 40 percent pebbles; neutral (pH 6.7); gradual wavy boundary. (5 to 13 inches thick)
AB--5 to 13 inches; yellowish red (5YR 4/6) very cobbly sandy clay loam, yellowish red (5YR 4/6) moist; weak fine subangular blocky structure parting to moderate very fine granular; soft, very friable, sticky and slightly plastic; common very fine, fine, medium and few coarse roots; many fine interstitial pores; 30 percent pebbles, 20 percent cobbles and stones; neutral (pH 7.3); clear wavy boundary. (7 to 9 inches thick)
Bw--13 to 24 inches; strong brown (7.4YR 5/6) very gravelly sandy clay loam, strong brown (7.5YR 4/6) moist; moderate medium and fine subangular block structure; soft, very friable, sticky and slightly plastic; common very fine and medium, few fine and coarse roots; many fine interstitial and common fine tubular pores; 30 percent pebbles, 10 percent cobbles and stones; neutral (pH 7.3); gradual wavy boundary. (8 to 25 inches thick)
C1--24 to 32 inches; strong brown (7.5YR 5/6) very cobbly heavy sandy loam, dark brown (7.5YR 4/4) moist; weak fine and medium subangular blocky and single grain structure; soft, very friable, slightly sticky and slightly plastic; common very fine, few fine medium and coarse roots; many very fine interstitial pores; 30 percent pebbles, 15 percent cobbles and stones; neutral (pH 7.3); clear irregular boundary. (8 to 11 inches thick)
C2--32 to 44 inches; reddish yellow (7.5YR 6/6) very cobbly heavy sandy loam, dark yellowish brown (10YR 4/6) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine, fine medium and coarse roots; few fine and very fine tubular pores; 20 percent pebbles, 20 percent cobbles and stones; mildly alkaline (pH 7.5); gradual irregular boundary (12 to 16 inches thick).
Cr--44 to 62 inches; highly fractured and weathered ultramafic rock.
TYPE LOCATION: Siskiyou County, California; about 9 miles southwest of Weed, about 1/4 mile up hill and east of Tamarack Flat, about 2,200 feet of south of the NW corner of section 27, T.41N., R.6W at a road cut on an abandoned logging road. (Reached by walking from Tamarack Flat.)
RANGE IN CHARACTERISTICS: The thickness of the solum and depth to bedrock ranges from 40 to 60 inches. The mean annual soil temperature is 40 to 47 degrees F. The soil is usually moist, but is dry to a depth of 21 inches or deeper for 45 to 90 days from July 1 to September 30. Rock fragments consists of stones, cobbles and pebbles throughout the profile. The base saturation is 60 percent or more in some part of the soil between depths of 10 and 30 inches.
The A horizon has dry color of 7.5YR 4/6, 5/8 or 5YR 4/6 and moist color of 7.5YR 3/6, 4/4, 5YR 4/4, 4/6 or 2.5YR 3/4. It is loam, silt loam or sandy clay loam with 18 to 27 percent clay modified by 35 to 40 percent rock fragments. It is slightly acid or neutral.
The Bw horizon has dry color of 10YR 4/6, 7.5YR 5/6, 4/6 or 5YR 5/6 and moist color of 10YR 4/6, 7.5YR 4/6, 4/4 or 5YR 4/6. It is loam, sandy clay loam or clay loam with 18 to 30 percent clay and is modified by 35 to 50 percent rock fragments. It has weak to moderate subangular blocky structure and has redder hue and more clay than the underlying horizon. It is neutral or mildly alkaline.
COMPETING SERIES: There are no other series in this family.
GEOGRAPHIC SETTING: Parks soils are on slightly dissected uplands and on ground moraines. Slopes are 5 to 80 percent. The soils formed in material weathered from ultramafic rocks such as peridotite. The elevation ranges from 5,000 to 6,400 feet. The climate is subhumid with warm dry summers and cold moist winters. Mean annual precipitation is 50 to 70 inches. Snowfall averages 15 to 25 inches. Mean annual temperature is 37 to 44 degrees F., mean January temperature is 28 degrees F. and mean July temperature is 61 degrees F. The average frost-free season is 80 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: See Remarks.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderate permeability.
USE AND VEGETATION: Limited timber production and watershed. Natural vegetation is mixed conifers and shrubs; principal species are white fir, western white pine, Jeffery pine, Douglas-fir, incense cedar, huckleberry oak, pinemat manzanita and California coffeeberry.
DISTRIBUTION AND EXTENT: Klamath mountains of northern California and southern Oregon. The soils of this series are not extensive. Their total acreage is about 10,000 acres.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Klamath National Forest, California, 1982.
REMARKS: This series was established to map a new family in a survey area where map unit components were classified only to the family level.
OSED scanned by SSQA. Last revised by state on 8/82.