LOCATION GLAZE OREstablished Series
TAXONOMIC CLASS: Ashy over loamy-skeletal, glassy over isotic Xeric Vitricryands
TYPICAL PEDON: Glaze sandy loam - woodland, on a 50 percent northeast slope at 4320 feet elevation. (When described (7/25/85), the soil was dry throughout. Colors are for moist soil unless otherwise noted)
Oi--3 inches to 0; litter of ponderosa pine needles and twigs.
A1--0 to 4 inches; dark yellowish brown (10YR 3/4) sandy loam, dark yellowish brown (10YR 4/4) dry; single grain; slightly hard, friable, nonsticky and nonplastic; many very fine and fine roots; few fine irregular pores; 5 percent gravel and 5 percent cobbles; 10 percent estimated clay; neutral (pH 6.8); clear smooth boundary.
A2--4 to 19 inches; dark brown (7.5YR 4/4) cobbly sandy loam, brown (7.5YR 5/4) dry; weak medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common fine and medium roots; many very fine and fine irregular pores; 15 percent gravel and 15 percent cobbles; 15 percent estimated clay; neutral (pH 7.0); gradual wavy boundary. (Combined thickness of the A horizon is 14 to 20 inches)
2Btb1--19 to 33 inches; dark brown (7.5YR 4/4) very cobbly loam, brown (7.5YR 5/4) dry; moderate medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common medium roots; many very fine tubular pores; few faint clay films on ped faces; 30 percent gravel, 20 percent cobbles and 5 percent stones; 20 percent estimated clay; neutral (pH 7.2); gradual wavy boundary.
2Btb2--33 to 54 inches; dark brown (7.5YR 4/4) extremely stony loam, brown (7.5YR 5/4) dry; moderate medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common coarse roots; few fine tubular pores; common faint clay films in pores and on ped faces; 30 percent gravel, 25 percent cobbles and 30 percent stones; 20 percent estimated clay; neutral (pH 7.2); clear irregular boundary. (Combined thickness of the 2Btb horizon is 26 to 46 inches)
2Cr--54 inches; weathered tuff.
TYPE LOCATION: Jefferson County, Oregon; in roadcut above road on south side of draw, on USFS road 1150 0.2 miles from the junction with USFS road 1140-820; northeast quarter of the southeast quarter of section 7, T. 12 S, R. 10 E. (Latitude 44 degrees, 32 minutes, 36 seconds N, Longitude 121 degrees, 34 minutes, 26 seconds W)
RANGE IN CHARACTERISTICS: The depth to a paralithic contact is 40 to 60 inches. The soil moisture control section is usually moist but is dry in all parts for 45 to 60 consecutive days within the 4 months that follow the summer solstice. The mean annual soil temperature is 41 to 45 degrees F. The mean summer soil temperature is 43 to 47 degrees F. Depth to the buried argillic horizon is 14 to 20 inches.
The Oi horizon is 2 to 4 inches thick except where disturbed.
The A horizon has value of 3 or 4 moist, 4 or 5 dry and chroma of 3 or 4 moist or dry. It is a sandy loam or cobbly sandy loam with 10 to 18 percent field estimated clay and 0 to 15 percent gravel and 0 to 15 percent cobbles. Total rock fragment content ranges from 0 to 30 percent. It has 50 to 80 percent glass and glass coated aggregates.
The 2Btb horizons have hue of 7.5YR, value of 4 or 5 moist and dry, and chroma of 4 moist and dry. It is very cobbly or extremely stony loam or very cobbly clay loam with 18 to 35 percent field estimated clay and 15 to 30 percent gravel, 15 to 40 percent cobbles and 10 to 30 percent stones. Total rock fragments range from 35 to 70 percent.
COMPETING SERIES: This is the Manley series. Manley soils have a Cd horizon in the lower part of the particle-size control section and lack an argillic horizon.
GEOGRAPHIC SETTING: The Glaze soils are on mountains at elevations of 4000 to 5000 feet. The soils formed in ash over colluvium and residuum. The climate is characterized by cold, wet winters and cool, dry summers. The mean annual precipitation is 25 to 35 inches, falling mostly as snow. The mean annual temperature 40 to 44 degrees F. The frost-free period is 10 to 50 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gap (P) and Prairie (P) soils. Gap and Prairie soils are ashy over loamy. Prairie soils are 20 to 40 inches to bedrock.
DRAINAGE AND PERMEABILITY: Well-drained; moderate permeability.
USE AND VEGETATION: These soils are used timber production, wildlife habitat, recreation, and watershed. Potential native vegetation is ponderosa pine, Douglas fir, white fir, snowbrush ceanothus, chinkapin, and pinegrass.
DISTRIBUTION AND EXTENT: East slope of the Cascade Mountains in central Oregon; MLRA 6. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Jefferson County (Upper Deschutes River Area), Oregon, 1992.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon
Argillic horizon (buried) - from 19 to 54 inches (2Btb horizons)
Andic soil properties - The upper 19 inches of the soil meets andic soil properties (2c).
Particle-size control section - The upper mantle (0-19 inches) has andic soil properties and 15-bar water content of less than 12 (dried), this is based on geographically associated soils. The lower part from 19 to 54 inches does not have andic soil properties and has less than 30 percent glass.