LOCATION DAXTY OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Vitrandic Haploxerepts
TYPICAL PEDON: Daxty flaggy ashy loam, woodland. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 3 centimeters (0 to 1 inch); undecomposed pine needles and twigs.
A--3 to 10 centimeters (1 to 4 inches); very dark brown (10YR 2/2) flaggy ashy loam, dark grayish brown (10YR 4/2) dry; weak fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many fine roots; common very fine pores; 3 percent of surface covered with flagstones; 25 percent angular tuff flagstones; moderately acid (pH 6.0); clear smooth boundary. (5 to 20 centimeters (2 to 8 inches) thick)
Bw--10 to 28 centimeters (4 to 11 inches); dark brown (10YR 3/3) flaggy ashy loam, light brownish gray (10YR 6/2) dry; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine to medium roots; many fine and very fine irregular pores; 65 percent flagstones; slightly acid (pH 6.4); gradual wavy boundary. (15 to 64 centimeters (6 to 25 inches) thick)
BC1--28 to 64 centimeters (11 to 25 inches); brown (10YR 4/3) extremely flaggy ashy loam, light brownish gray (10YR 6/2) dry; massive; slightly hard, very friable, nonsticky and nonplastic; many very fine and medium roots; many very fine and fine pores; 25 percent channers, 40 percent flagstones; neutral (pH 6.6); gradual wavy boundary. (0 to 50 centimeters (0 to 20 inches) thick)
BC2--64 to 89 centimeters (25 to 35 inches); brown (10YR 4/3) extremely flaggy ashy loam, light brownish gray (10YR 6/2) dry; massive; soft, very friable, nonsticky and nonplastic; common roots; many very fine pores; 25 percent channers, 40 percent flagstones; neutral (pH 6.6); abrupt wavy boundary. (0 to 50 centimeters (0 to 20 inches) thick)
R--89 centimeters (35 inches); platy acidic tuff.
TYPE LOCATION: Grant County, Oregon; 8 kilometers (5 miles) east of Seneca on Logan Valley Road, then (0.9 kilometers (0.6 miles) north on Forest Service Road 1615, then 1.9 kilometers (1.2 miles) west on logging road, 9 meters (30 feet) south of road; SW1/4 SW1/4 sec. 16, T.16S., R.32E.; Seneca, Oregon USGS quad; lat. 44 degrees 11 minutes N. and 118 degrees 53 minutes W., NAD 83.
RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 6 to 8 degrees C. (42 degrees to 47 degrees F.) and the mean summer soil temperature ranges from 15 to 17 degrees C. (59 degrees to 63 degrees F.). These soils are usually moist but are dry throughout between depths of 10 to 30 centimeters (4 and 12 inches) for 60 to 75 consecutive days following the summer solstice. The upper 18 to 36 centimeters (7 to 14 inches) has an estimated moist bulk density of 0.85 to 0.95 g/cc, volcanic glass content of 20 to 30 percent for the weighted average of the 0.02 to 2.0 size fraction, and acid oxalate extractable aluminum plus one-half iron of 0.2 to 0.4 percent. The particle-size control section has 35 to 75 percent rock fragments and 5 to 18 percent clay. Depth to bedrock is 50 to 100 centimeters (20 to 40 inches). Base saturation by NH4OAc is 75 to 90 percent throughout the profile.
The particle size control section has fine earth textures of ashy sandy loam or ashy loam. Rock fragments are mainly volcanic tuff flagstones 3 to 5 centimeters (1 to 2 inches) thick and 15 to 38 centimeters (6 to 15 inches) in diameter. Total rock fragments average from 35 to 60 percent. Channers may occupy up to 30 percent of the control section.
The A horizon has value of 2 or 3 moist, 4 to 6 dry and chroma of 2 or 3 moist and dry. The fine earth is dominantly ashy loam, but may include ashy silt loam.
The Bw and BC horizons have hue of 10YR or 2.5Y, value of 3 or 4 moist, and chroma of 2 or 3 moist and dry.
COMPETING SERIES: These are the Analulu, Ardenvoir, Blinn, Brevco, Coxit, Easte, Highhorn, Huntrock, Jimbluff, Jumpe, Kamela, Lekrem, Longort, Noil, Ontrail, Radercreek, Redpeak, Santop, Seeburg, and Thout series. None of these soils are flaggy or channery.
Analulu soils - 8 to 15 percent clay in the pscs; 5 to 20 percent glass in the upper 18 to 36 centimeters (7 to 14 inches); dry 45 to 60 consecutive days following the summer solstice; rock fragments in the pscs of argillite origin.
Ardenvoir soils 100 to 152 centimeters (40 to 60 inches) to paralithic contact
Blinn soils - 5 to 20 percent glass in the upper 18 to 36 centimeters (7 to 14 inches); dry 45 to 60 consecutive days following the summer solstice; 15 to 70 percent stones in the pscs.
Brevco soils - 5 to 20 percent glass in the upper 18 to 36 centimeters (7 to 14 inches); less than 18 percent clay in the pscs; 5 to 20 percent glass in the upper 18 to 36 centimeters (7 to 14 inches).
Coxit soils - very deep to bedrock.
Easte soils 100 to 152 centimeters (40 to 60 inches) to paralithic contact; umbric epipedon 100 to 152 centimeters (40 to 60 inches) thick; dry greater than 75 consecutive days.
Highhorn soils 100 to 152 centimeters (40 to 60 inches) to lithic contact (argillite); 27 to 35 percent clay in the pscs; 40 to 60 percent glass in the upper 18 to 36 centimeters (7 to 14 inches).
Huntrock soils - 27 to 35 percent clay in the pscs; 40 to 60 percent glass in the upper 18 to 36 centimeters (7 to 14 inches).
Jimbluff soils - very deep to bedrock.
Jumpe soils - very deep to bedrock
Kamela soils 18 to 27 percent clay and 35 to 75 percent rock fragments (basalt)in the pscs.
Lekrem soils - deep and very deep to bedrock.
Longort soils 50 to 100 centimeters (20 to 40 inches) to a densic contact.
Noil soils 100 to 152 centimeters (40 to 60 inches) to a paralithic contact (schist).
Ontrail soils - very deep to bedrock; 5 to 12 percent clay in the pscs.
Radercreek soils 100 to 152 centimeters (40 to 60 inches) to lithic contact (sandstone).
Redpeak soils 50 to 100 centimeters (20 to 40 inches) to lithic contact (sandstone); 2.5 to 5YR hue throughout; 10 to 20 percent clay in the pscs.
Santop soils 50 to 100 centimeters (20 to 40 inches) to lithic contact (sandstone); 5 to 15 percent clay in the pscs; 5 to 20 percent glass in the upper 18 to 36 centimeters (7 to 14 inches).
Seeburg soils - very deep to bedrock.
Thout soils - 4 to 14 percent clay in the pscs; 5 to 20 percent glass in the upper 18 to 36 centimeters (7 to 14 inches).
GEOGRAPHIC SETTING: Daxty soils are on gently sloping to very steep hills at elevations ranging from 1036 to 1676 meters (3,400 to 5,500 feet). They formed in colluvium weathered from platy, light colored, and coarse textured acidic volcanic tuff mixed with Mazama volcanic ash throughout. The climate is characterized by cold, wet winters and hot, dry summers with a mean annual precipitation of 43 to 61 centimeters (17 to 24 inches). Slope is 2 to 50 percent. The mean annual temperature ranges from 4 to 7 degrees C. (40 degrees to 45 degrees F.); the mean July temperature is about 15 degrees C. (60 degrees F.), and the mean January temperature is about -2 degrees C. (29 degrees F.) Frost-free period ranges from 20 to 60 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Hankins, Klicker and Ruddley soils. All of these soils have mollic epipedons and lack channers and flagstones. Also, Hankins soils are deep and have clayey argillic horizons. Klicker soils overlie basalt. Ruddley soils are shallow over a paralithic contact.
DRAINAGE AND PERMEABILITY: Well drained; moderate to rapid runoff; moderate permeability.
USE AND VEGETATION: Timber production and livestock grazing. Vegetation is mainly ponderosa pine with an understory of mountain big sagebrush, Idaho fescue, and bluebunch wheatgrass, MLRA 10.
DISTRIBUTION AND EXTENT: East-central Oregon. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Grant County, Oregon, 1975.
REMARKS: Diagnostic horizons and features in this pedon include:
Ochric epipedon
Base saturation the zone from 3 to 89 centimeters (1 to 35 inches) has a base saturation by NH4OAc of over 75 percent throughout the profile.
Vitrandic feature the zone from 3 to 89 centimeters (1 to 35 inches)
Cambic horizon the zone from 10 to 28 centimeters (4 to 11 inches)
Particle-size control section - the zone from 28 to 89 centimeters (11 to 35 inches) with a weighted average of 65 percent channers and flagstones.
This series has been reclassified from Typic Haploxerepts to Vitrandic Haploxerepts based on lab data.
Pedon sample 97OR-023-010, Soil Survey Lab, Lincoln, Nebraska.