LOCATION ANALULU OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Vitrandic Haploxerepts
TYPICAL PEDON: Analulu gravelly ashy fine sandy loam - woodland, on a 27 percent south-facing slope at an elevation of 5,100 feet. (Colors are for moist soil unless otherwise noted.)
A--0 to 5 inches; very dark grayish brown (10YR 3/2) gravelly ashy fine sandy loam, brown (10YR 5/3) dry; moderate fine and medium subangular blocky structure; soft, friable, nonsticky and nonplastic; common fine and few medium roots; common fine tubular pores; 25 percent gravel; moderately acid (pH 6.0); clear smooth boundary. (4 to 8 inches thick)
Bw--5 to 14 inches; yellowish brown (10YR 5/4) gravelly ashy loam, very pale brown (10YR 7/4) dry; weak medium subangular blocky structure parting to moderate fine and very fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; common fine and few medium and coarse roots; common fine and few medium tubular pores; 30 percent gravel; moderately acid (pH 6.0); clear smooth boundary. (9 to 18 inches thick)
BC--14 to 24 inches; light gray (10YR 7/2) very gravelly loam, very pale brown (10YR 8/2) dry; weak very fine subangular blocky structure; slightly hard, firm, slightly sticky and nonplastic; common silt coatings on rock fragments; few fine and coarse and common medium roots; common fine irregular and few fine tubular pores; 40 percent gravel; moderately acid (pH 5.6); gradual smooth boundary. (0 to 14 inches thick)
C--24 to 33 inches; light gray (10YR 7/2) very gravelly loam, very pale brown (10YR 8/2) dry; massive; slightly hard, firm, slightly sticky and nonplastic; common-silt coatings on rock fragments; few fine roots; few fine irregular pores; 55 percent gravel; moderately acid (pH 5.6; clear smooth boundary.(0 to 15 inches thick)
R--33 inches; fractured argillite.
TYPE LOCATION: Grant County, Oregon, about 1,590 feet west and 1,590 feet north of the southeast corner of Section 2, T. 10 S., R. 38 E. (Latitude 44 degrees, 56 minutes, 18 seconds N; Longitude 118 degrees, 23 minutes, 15 seconds W.) USGS Philips Lake Quadrangle.
RANGE IN CHARACTERISTICS:
Soil moisture - usually moist but are dry for 45 to 60 consecutive days following the summer solstice. Mean annual soil temperature - 40 to 46 degrees F.
Particle-size control section - 8 to 15 percent clay and 35 to 75 percent rock fragments.
Depth to bedrock - 20 to 40 inches.
Volcanic ash influence - 7 to 14 inches thick. Acid - oxalate extractable aluminum plus one-half iron - 0.5 to 1.0 percent. Phosphate retention - 35 to 55 percent. Glass content - 5 to 20 percent. Moist bulk density - 0.85 to 1.0 g/cc.
A horizon hue - 10YR or 7.5YR. value - 2 or 3 moist, 4 or 5 dry. Chroma - 2 or 3 moist, 2 to 4 dry. Texture - GR-SIL, GR-FSL. Rock fragments - 20 to 35 percent total with 20 to 35 percent gravel, 0 to 5 percent cobbles, and 0 to 5 percent stones. Clay - 5 to 15 percent. Reaction - 5.6 to 6.5.
Bw horizon hue - 10YR or 7.5YR. Value - 3 to 5 moist, 5 to 7 dry. Chroma - 3 or 4 moist and dry. Texture - GR-L, GRV-L, GRV-SIL, GRV-SL. Rock fragments - 30 to 50 percent total with 25 to 40 percent gravel, 0 to 10 percent cobbles, and 0 to 5 percent stones. Clay - 8 to 15 percent. Reaction - 5.6 to 7.5.
BC horizon hue - 10YR or 7.5YR. Value - 4 to 7 moist, 5 to 8 dry. Chroma - 2 to 4 moist and dry. Texture - GRV-L, GRV-SIL, GRX-L, CBV-L, GBX-L. Rock fragments - 35 to 75 percent total with 30 to 55 percent gravel, 5 to 20 percent cobbles, and 0 to 5 percent stones. Clay - 8 to 15 percent. Reaction - 5.6 to 6.5.
C horizon - similar to BC horizon however, lacks structure.
COMPETING SERIES: These are Blinn, Brevco (T), Coxit (T), Highhorn, Huntrock, Jimbluff (T), Jumpe, Kamela, Lekrem (T), Longort (T), Noil, Ontrail (T), Radercreek (T), Redpeak (T), Santop (T) Seeburg (T) and Thout (T). Blinn soils have a particle-size control section with 18 to 27 percent clay and more than 35 percent angular basalt rock fragments of which 15 to 70 percent are stones. Brevco soils are dry for 60 to 75 consecutive days following the summer solstice, have a moist bulk density of 1.20 to 1.55 g/cc in the upper 7 to 14 inches, and is dominated by granitic rock fragments. Coxit soils are greater than 60 inches to bedrock and are dry for 60 to 75 consecutive days following the summer solstice. Highhorn soils are 40 to 60 inches to a lithic contact (argillite), have 27 to 35 percent clay in the particle-size control section, and have 40 to 60 percent volcanic glass in the upper 7 to 14 inches. Huntrock soils have 27 to 35 percent clay in the particle-size control section and 40 to 60 percent volcanic glass in the upper 7 to 14 inches. Jimbluff and Jumpe soils are greater than 60 inches to bedrock and are dry for 60 to 75 consecutive days following the summer solstice. Kamela soils are dry for 45 to 75 consecutive days following the summer solstice, have 18 to 27 percent clay and are dominated by rock fragments of basalt origin within the particle-size control section. Lekrem soils are deep and very deep. Longort soils are 20 to 40 inches to a densic contact. Noil soils are 40 to 60 inches to a paralithic contact (schist). Onrail soils are greater than 60 inches to bedrock. Radercreek soils are 40 to 60 inches to a lithic contact (sandstone). Redpeak soils have hues of 5YR and 2.5YR and are dry for 60 to 75 consecutive days following the summer solstice. Santop soils are dry for 60 to 75 consecutive days following the summer solstice, and have moist bulk density in the upper 10 to 18 inches of 1.10 to 1.40 g/cc. Seeburg soils are very deep are dry for 60 to 75 consecutive days following the summer solstice, and have 4 to 7 percent clay in the particle-size control section. Thout soils are dry for 60 to 75 consecutive days following the summer solstice and have particle-size control section which includes rounded rock fragments from glacial till.
GEOGRAPHIC SETTING: The Analulu series occurs on backslopes and ridges of mountains. Slopes are 0 to 90 percent. Elevations are 3,800 to 6,200 feet. Analulu soils are formed in colluvial and residual material derived from argillite or other metasedimentary rocks with an influence of volcanic ash. The climate is characterized by cold, wet winters and cool to warm, moist to dry summers. The mean annual precipitation is 25 to 40 inches. The mean annual temperature is 38 to 44 degrees F. The frost-free period is 45 to 85 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bluecanyon, Crackler, Eastpine, Thirstygulch, and competing Highhorn series. Bluecanyon soils are 10 to 20 inches deep and are on side slopes and ridges of mountains. Crackler soils have andic properties over 14 inches. Eastpine soils have a mollic epipedon and are on ridges, shoulders, and side slopes of mountains. Thirstygulch soils have a mollic epipedon, are 10 to 20 inches deep, and are on ridges and side slopes of mountains.
DRAINAGE AND PERMEABILITY: Well drained; permeability is moderate.
USE AND VEGETATION: These soils are used for timber production, watershed, wildlife and recreation. The native vegetation is Douglas fir, ponderosa pine, curlleaf mountain mahogany, heartleaf arnica, creeping Oregongrape, common snowberry, lupines, common yarrow, broadpetal strawberry, birchleaf spiraea, pinegrass, elk sedge and northwestern sedge. Moist phases have grand fir, scoulers willow, common snowberry, mountain maple, western hawkweed and bigleaf sandwort.
DISTRIBUTION AND EXTENT: Blue Mountains of northeastern Oregon; MLRA 43. The soils are moderately extensive.
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Wallowa County, Oregon 1998. The name is derived from a mine.
REMARKS: Diagnostic horizons and features recognized in this pedon are
Ochric epipedon - from 0 to 5 inches (A horizon)
Cambic horizon - from 5 to 24 inches (Bw and BC horizons)
Particle-size control section - from 10 to 33 inches (lower Bw and the BC horizon)
Vitrandic feature - from 0 to 14 inches.
The dominant USFS plant communities are PSME/CARU with others including PSME/SYAL and PIPO/SYAL. Moist phases will include dominantly ABGR/CARU with ABGR/SPBE and ABGR/ACGL.
ADDITIONAL DATA: Laboratory data available for sample Sl97OR-001-003; Baker County, Oregon; sampled NSSL, Lincoln, NE, 11/96.