LOCATION CEDARCAMP OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, magnesic, frigid Dystric Eutrudepts
TYPICAL PEDON: Cedarcamp very gravelly loam - woodland, on a 43 percent east-facing slope at 3,280 feet elevation. (When described on August 3, 1989 the soil was dry to a depth of 30 inches and moist below this depth. Colors are for moist soil unless otherwise noted.)
Oi--0 to 1 inch; partially decomposed needles, leaves, twigs, and woody materials.
A--1 to 7 inches; dark brown (10YR 4/3) very gravelly loam, pale brown (10YR 6/3) dry; weak very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine, common medium, and few coarse roots; few fine tubular pores; 30 percent gravel and 10 percent cobbles; slightly acid (pH 6.5); clear smooth boundary. (5 to 7 inches thickt)
BA--7 to 19 inches; dark yellowish brown (10YR 4/4) very cobbly clay loam, pale brown (10YR 6/3) dry; weak very fine and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine, common medium, and few coarse roots; few fine tubular pores; 20 percent gravel, 20 percent cobbles and 5 percent stones; slightly acid (pH 6.5); clear wavy boundary. (0 to 12 inches thick)
Bw--19 to 30 inches; dark yellowish brown (10YR 4/4) very cobbly clay loam, light yellowish brown (10YR 6/4) dry; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and medium, and few coarse roots; few fine tubular pores; 20 percent gravel, 20 percent cobbles and 10 percent stones; neutral (pH 6.7); clear wavy boundary. (10 to 18 inches thick)
BC--30 to 40 inches; olive brown (2.5Y 4/4) extremely cobbly loam, light yellowish brown (2.5Y 6/4) dry; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine, and few medium and coarse roots; few fine tubular pores; 25 percent gravel, 30 percent cobbles and 10 percent stones; neutral (pH 6.7); clear wavy boundary. (0 to 13 inches thick)
C1--40 to 51 inches; dark grayish brown (2.5Y 4/2) extremely cobbly clay loam, light brownish gray (2.5Y 6/2) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; common fine, and few medium and coarse roots; few fine tubular pores; 30 percent gravel, 30 percent cobbles and 10 percent stones; neutral (pH 6.7); gradual wavy boundary. (10 to 15 inches thick)
C2--51 to 66 inches; dark grayish brown (2.5Y 4/2) extremely cobbly clay loam, light gray (2.5Y 7/2) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; few fine and medium roots; few fine tubular pores; 35 percent gravel, 30 percent cobbles and 10 percent stones; neutral (pH 6.8).
TYPE LOCATION: Curry County, Oregon; located about 330 feet north and 330 feet east of the southwest corner of section 28, T. 37 1/2 S., R. 12 W. (Latitude 42 degrees, 19 minutes, 00 seconds N.; Longitude 124 degrees, 08 minutes, 01 seconds W.)
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 41 to 46 degrees F. The soils are usually moist but are dry for less than 45 consecutive days in all parts between depths of 4 and 12 inches in the four months following the summer solstice. The particle size control section averages 20 to 35 percent clay and has 35 to 70 percent total rock fragments. Depth to bedrock is greater than 60 inches. Soil reaction is slightly acid to neutral throughout.
The A horizon has hue of 5YR, 7.5YR or 10YR, value of 4 or 5 moist, 5 or 6 dry and chroma of 3 or 4 moist and dry. The texture of the fine earth fraction is loam averaging 15 to 25 percent clay. Total rock fragments range from 35 to 60 percent. It has 0 to 20 percent boulders, 0 to 15 percent stones, 5 to 15 percent cobbles, and 10 to 40 percent gravel.
The Bw horizon has hue of 5YR, 7.5YR or 10YR, value of 4 or 5 moist, 5 or 6 dry and chroma of 3 to 6 moist and dry. The texture of the fine earth fraction is clay loam or loam averaging 20 to 35 percent clay. Total rock fragments range from 35 to 70 percent. It has 0 to 15 percent boulders, 0 to 25 percent stones, 10 to 30 percent cobbles, and 5 to 30 percent gravel.
The BC horizon has hue of 10YR or 2.5Y, value of 4 or 5 moist, 5 or 6 dry and chroma of 4 to 6 moist and dry. The texture of the fine earth fraction is clay loam or loam averaging 20 to 35 percent clay. Total rock fragments range from 35 to 70 percent. It has 0 to 15 percent boulders, 0 to 25 percent stones, 10 to 35 percent cobbles, and 5 to 25 percent gravel.
The C horizon has hue of 10YR or 2.5Y, value of 4 or 5 moist, 5 to 7 dry and chroma of 2 to 6 moist and dry. The texture of the fine earth fraction is clay loam or loam averaging 20 to 35 percent clay. Total rock fragments range from 50 to 80 percent. It has 0 to 25 percent boulders, 0 to 25 percent stones, 10 to 30 percent cobbles, and 10 to 40 percent gravel.
COMPETING SERIES: This is the Snowcamp series. Snowcamp soils are 20 to 40 inches deep to bedrock.
GEOGRAPHIC SETTING: Cedarcamp soils are on metastable broad ridgetops and metastable to active side slopes of mountains. Slopes are 0 to 90 percent. The soils formed in colluvium and residuum derived from serpentinized peridotite or serpentinized metaigneous rock types. Elevations are 2,500 to 4,500 feet. The climate is characterized by cool, wet winters and warm, moist summers. The mean annual precipitation is 130 to 160 inches. The mean annual temperature is 40 to 45 degrees F. The frost-free period is 60 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Flycatcher, and the competing Snowcamp soils. Flycatcher and Snowcamp soils are on broad ridgetops and side slopes of mountains. Flycatcher soils are 10 to 20 inches deep to bedrock.
DRAINAGE AND PERMEABILITY: Well drained; moderately slow permeability.
USE AND VEGETATION: These soils are used for watershed, recreation, woodland, and wildlife habitat. The native vegetation is Jeffrey pine, knobcone pine, western white pine, Port Orford cedar, tanoak, Douglas fir, greenleaf manzanita, western azalea, Sadler oak, boxleaf silktassel, red huckleberry, huckleberry oak, California buckthorn, squawcarpet, and common beargrass.
DISTRIBUTION AND EXTENT: Mountainous areas of southwestern Oregon; MLRA 1. The series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Coos County, Oregon, 1993.
REMARKS: Diagnostic horizons and features recognized in this pedon include:
Ochric epipedon.
Cambic horizon - from a depth of 19 to 30 inches (Bw horizon).
Particle-size control section - from 11 to 41 inches (part of the BA horizon, Bw, BC horizons, and part of the C1 horizon).
Eutrudepts great group - base saturation by ammonium acetate is 60 to 80 percent between depths of 10 and 30 inches below the mineral soil surface (BC horizon lab data).
ADDITIONAL DATA: Partial laboratory data available for pedons 90P 318 and 90P 320 from Curry County, Oregon sampled by NSSL at Lincoln, Nebraska - 3/90.