LOCATION FLYCATCHER OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, magnesic, frigid Lithic Eutrudepts
TYPICAL PEDON: Flycatcher very cobbly loam - woodland, on a 40 percent southeast-facing slope at 3,920 feet elevation. (When described on October 3, 1990 the soil was moist throughout. Colors are for moist soil unless otherwise noted.)
Oi--0 to 1 inch; partially decomposed needles, leaves, twigs, and woody materials.
A--1 to 5 inches; dark brown (10YR 3/3) very cobbly loam, brown (10YR 4/3) dry; weak very fine and fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine, and common medium and coarse roots; few fine tubular pores; 20 percent gravel and 30 percent cobbles; slightly acid (pH 6.4); clear smooth boundary. (3 to 5 inches thick)
Bw1--5 to 10 inches; dark yellowish brown (10YR 4/4) very gravelly clay loam, yellowish brown (10YR 5/4) dry; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine, and common medium and coarse roots; common fine and medium tubular pores; 40 percent gravel and 10 percent cobbles; neutral (pH 6.8); clear smooth boundary.
Bw2--10 to 16 inches; dark yellowish brown (10YR 4/4) very gravelly sandy clay loam, yellowish brown (10YR 5/4) dry; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many fine, and few medium roots; common medium tubular pores; 45 percent gravel and 10 percent cobbles; neutral (pH 6.9); clear wavy boundary. (Combined thickness of the Bw horizon is 6 to 11 inches)
C--16 to 19 inches; dark yellowish brown (10YR 4/4) extremely gravelly loam, yellowish brown (10YR 5/4) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; few fine and medium tubular pores; 45 percent gravel and 15 percent cobbles; neutral (pH 7.2); abrupt wavy boundary. (2 to 5 inches thick)
R--19 inches; fractured peridotite.
TYPE LOCATION: Curry County, Oregon; located about 990 feet north and 990 feet east of the southwest corner of section 4, T. 37 S., R. 12 W., W.M. (Latitude 42 degrees, 24 minutes, 02 seconds N.; Longitude 124 degrees, 07 minutes, 25 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 80 percent total rock fragments. Depth to bedrock is 10 to 20 inches. Soil reaction is slightly acid to neutral throughout. Hue is 5YR, 7.5YR, or 10YR in the solum.
The A horizon has value of 3 or 4 moist, 4 or 5 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. It has 0 to 20 percent boulders, 0 to 15 percent stones, 5 to 30 percent cobbles, and 10 to 25 percent gravel.
The Bw horizon has 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 loam, clay loam or sandy clay loam averaging 20 to 35 percent clay. It has 0 to 25 percent boulders, 0 to 30 percent stones, 10 to 20 percent cobbles, and 5 to 50 percent gravel.
The C horizon has hue of 7.5YR, 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 loam, clay loam or sandy clay loam averaging 20 to 35 percent clay. It has 0 to 20 percent boulders, 0 to 30 percent stones, 10 to 20 percent cobbles, and 5 to 45 percent gravel.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Flycatcher 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 Cedarcamp, and Snowcamp soils. Cedarcamp and Snowcamp soils are on broad ridgetops and side slopes of mountains. Cedarcamp soils are greater than 60 inches deep to bedrock. Snowcamp soils are 20 to 40 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 knobcone pine, Jeffrey pine, incense cedar, tanoak, greenleaf manzanita, western azalea, California buckthorn, whiteleaf manzanita, Sadler oak, squawcarpet, pinemat manzanita, boxleaf silktassel, huckleberry oak, common juniper, 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 5 to 16 inches (Bw1, Bw2 horizons).
Particle-size control section - from 11 to 19 inches (part of the Bw2 horizon, C horizon).
Eutrochrepts great group - from 10 to 16 inches (Bw2 horizon) the base saturation by ammonium acetate is 99 percent.
Also qualifier as Dystric subgroup.
Lithic subgroup - soil depth is 19 inches to bedrock.
ADDITIONAL DATA: Partial laboratory data available for pedon 90P 317, samples 90P1913-1914 from Curry County, Oregon sampled by NSSL at Lincoln, Nebraska - 3/90.