LOCATION ROUEN OREstablished Series
TAXONOMIC CLASS: Ashy over loamy-skeletal, glassy over isotic, frigid Typic Vitrixerands
TYPICAL PEDON: Rouen gravelly ashy silt loam - on a 45 percent convex north-facing slope, woodland. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 1 inch; partially decomposed litter layer of needles, leaves, and twigs.
A1--1 to 4 inches; dark brown (10YR 3/3) gravelly ashy silt loam, pale brown (10YR 6/3) dry; weak very fine subangular blocky structure parting to weak fine granular; soft, very friable, nonsticky and nonplastic, moderately smeary; many very fine and fine and few medium and coarse roots; many very fine and fine irregular pores; 25 percent gravel; slightly acid (pH 6.2); clear smooth boundary. (3 to 8 inches thick)
A2--4 to 17 inches; dark yellowish brown (10YR 4/4) gravelly ashy silt loam, light yellowish brown (10YR 6/4) dry; weak very fine and fine subangular blocky structure; soft, very friable, nonsticky and nonplastic, moderately smeary; many very fine and fine and few medium and coarse roots; many very fine and fine irregular pores; 30 percent gravel; slightly acid (pH 6.4); clear smooth boundary. (8 to 20 inches thick)
2Bw1--17 to 24 inches; yellowish brown (10YR 5/4) extremely gravelly silty clay loam, very pale brown (10YR 7/3) dry; moderate fine subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common fine and few medium and coarse roots; common fine and medium tubular pores; 60 percent gravel and 5 percent cobbles; neutral (pH 6.6); gradual wavy boundary. (6 to 10 inches thick)
2Bw2--24 to 32 inches; yellowish brown (10YR 5/4) extremely gravelly clay loam, very pale brown (10YR 7/3) dry; moderate fine and medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common fine and few medium and coarse roots; common fine and medium tubular pores; 60 percent gravel and 10 percent cobbles; neutral (pH 6.6); abrupt wavy boundary. (0 to 10 inches thick)
3R--32 inches; argillite.
TYPE LOCATION: Baker County, Oregon; SW1/4SW1/4NW1/4 of sec. 32, T. 9 S., R. 37 E.
RANGE IN CHARACTERISTICS: These soils are usually moist, but are dry in the moisture control section for 45 to 60 consecutive days following the summer solstice. The mean annual soil temperature is 43 to 47 degrees F. Depth to bedrock is 20 to 40 inches. Thickness of the volcanic ash mantle and depth to the contrasting material is 14 to 25 inches. It contains 60 to 70 percent volcanic glass and glass aggregate.
The A horizon has value of 2 or 3 moist, 5 or 6 dry and chroma of 2 through 4 moist and dry. It has 15 to 25 percent gravel and 0 to 5 percent cobbles and stones. It is slightly or moderately acid. It is moderately or slightly smeary.
The A2 horizon has hue of 10YR or 7.5YR, value of 3 or 4 moist, 4 to 6 dry and chroma of 3 or 4 moist and dry. It is silt loam with 15 to 30 percent gravel and 0 to 5 percent cobbles. It is slightly acid or neutral. It is moderately or slightly smeary.
The 2Bw horizon has hue of 10YR to 7.5YR, value of 3 to 5 moist, 4 to 7 dry and chroma of 3 or 4 moist and dry. It is silty clay loam, clay loam or loam, averaging 25 to 35 percent clay. It has 30 to 60 percent gravel and 5 to 10 percent cobbles. It is slightly acid or neutral.
COMPETING SERIES: These are the Brannan, Capoose, Crackler, Elbowlake, Farway, Kellerbutte, Natapoc, Nevine, Olot, Saska, and Vingulch series. Brannan and Crackler soils are deep to bedrock. Capoose and Vingulch soils are dry for 60 to 75 consecutive days following the summer solstice. Elbowlake, Natapoc, and Nevine soils have 2Cd horizons. Olot soils are over basalt bedrock and have more than 10 percent cobbles in the 2Bw horizon. Farway, Kellerbutte, and Saska soils are very deep.
GEOGRAPHIC SETTING: Rouen soils are on north side slopes of forested areas at elevations of 3,800 to 6,200 feet. Slopes are 2 to 50 percent. The soils formed in colluvium from argillite with a mantle of volcanic ash in the surface horizons. The climate is characterized by cold and wet winters and hot and dry summers. The mean annual precipitation is 20 to 35 inches. The mean annual temperature is 40 to 45 degrees F. The frost-free period is 30 to 50 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Angelpeak, Highhorn, Huntrock, Kilmerque, Tolo, Snowslide, Stices, and the competing Crackler soils. Angelpeak soils have a cryic temperature regime. Highhorn soils are deep, loamy-skeletal and on adjacent south slopes. Huntrock soils are loamy-skeletal and on adjacent south slopes. Kilmerque and Snowslide soils are on adjacent granitic uplands. Tolo soils are deep and ashy over loamy. Stices soils are ashy-skeletal.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is slow to rapid. Permeability is moderate in the surface horizons and moderately slow in the subsoil.
USE AND VEGETATION: These soils are used mainly for timber production. The vegetation is mainly Douglas fir, grand fir, western larch, minor amounts of ponderosa pine and lodgepole pine, common snowberry, princes pine, low Oregon grape, myrtle pachystima, elk sedge, pinegrass, big huckleberry, western rattlesnake plantain, twinflower, and heartleaf arnica.
DISTRIBUTION AND EXTENT: Blue Mountains of northeastern Oregon. The soils are of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Baker County, Oregon, 1942.
REMARKS: This draft reflects a change in mineralogy from mixed to glassy over isotic.
Diagnostic horizons and features in this pedon include:
Ochric epipedon - from 1 to 4 inches (A1 horizon)
Cambic horizon - from 4 to 32 inches (A2, 2Bw1, 2Bw2 horizons)
Vitrixerands feature - based on laboratory data; volcanic glass and glass aggregate is more than 60 percent, more than 0.4 percent acid oxylate Al + 1/2Fe, and less than 12 percent 15-bar moisture content (dry).
Ashy contrasting family placement - based on laboratory data and control section from 1 to 32 inches.
ADDITIONAL DATA: Sample numbers 86T7091-92; data is for glass count