LOCATION LOSTBEAR ORTentative Series
Oi--0 to 0.5 inch; slightly decomposed plant material; forest litter of needles, twigs, cones, leaves and herbaceous material; abrupt smooth boundary. (0 to 1 inch thick)
Oa--0.5 to 3 inches; highly decomposed plant material; about 20 percent fiber, 5 percent rubbed; many very fine and fine, common medium, and few coarse roots; many very fine irregular pores; root mat dominated by woody and herbaceous material; abrupt smooth boundary. (0 to 3 inches thick)
A--3 to 8 inches; very dark brown (10YR 2/2) medial silt loam, grayish brown (10YR 5/2) dry; moderate very thick platy structure parting to moderate medium subangular blocky; slightly hard, very friable, slightly sticky, slightly plastic; many very fine, common fine, and few medium roots; common very fine tubular pores; 1 percent medium irregular yellowish red (5YR 4/6) iron-manganese masses infused into matrix adjacent to pores, brown (7.5YR 4/4) dry; 5 percent indurated volcanic rock gravel, 1 percent indurated volcanic rock cobbles and 5 percent indurated volcanic rock stones; moderately acid (pH 5.8); clear wavy boundary. (5 to 10 inches thick)
Bw--8 to 22 inches; brown (7.5YR 4/4) extremely stony medial loam, light yellowish brown (10YR 6/4) dry; moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; common very fine and fine roots; many very fine tubular pores; 15 percent medium irregular strong brown (7.5YR 4/6) iron-manganese masses throughout, yellowish brown (10YR 5/8) dry; 5 percent indurated volcanic rock gravel and 35 percent indurated volcanic rock cobbles and 30 percent indurated volcanic rock stones; moderately acid (pH 5.8); gradual wavy boundary. (10 to 32 inches thick)
Bqc--22 to 33 inches; brown (7.5YR 4/4) very gravelly sandy loam, light yellowish brown (10YR 6/4) dry; moderate thick platy structure; slightly hard, firm, slightly sticky, moderately plastic; brittle; few very fine and fine roots; common very fine and fine tubular, and few medium irregular pores; 25 percent indurated volcanic rock gravel, 4 percent strongly cemented iron-manganese nodule gravel, 15 percent indurated volcanic rock cobbles and 5 percent moderately cemented iron-manganese nodule paragravel; moderately acid (pH 5.8); abrupt wavy boundary. (8 to 20 inches thick)
Bq--33 to 63 inches; brown (7.5YR 4/3) very gravelly silt loam, brown (10YR 5/3) dry; massive; slightly hard, firm, moderately sticky, moderately plastic; brittle; common fine tubular pores; 30 percent indurated volcanic rock gravel and 10 percent indurated volcanic rock cobbles; moderately acid (pH 5.8).
TYPE LOCATION: Klamath County, Oregon; about 4 miles south and 15 miles west of Chiloquin; 950 feet east and 350 feet south of the northwest corner of section 13, T. 35 S., R. 5 E., Pelican Butte, Oregon USGS quadrangle. UTM: 0566993 meters E; 4708892 meters N; Zone 10 N. NAD27 CONUS datum. Latitude: 42 degrees 31 minutes 53.00 seconds north, Longitude: 122 degrees 11 minutes 3.00 seconds west.
RANGE IN CHARACTERISTICS:
Soil Temperature: cryic regime
Mean annual soil temperature - 35 to 38 degrees F
Mean summer soil temperature - 38 to 42 degrees F
Mean winter soil temperature - 32 to 35 degrees F
Soil Moisture: aquic regime; moisture control section - 8 to 24 inches, saturated in all parts for 15 to 30 days in May or June, saturated in lower part for 90 to 120 days in May to August, moist when not saturated
Particle-size control section: from the mineral soil surface to 40 inches below the mineral soil surface
Upper part (medial): 5 to 10 inches thick
rock fragment content, average: 5 to 15 percent
Middle part (medial-skeletal; thickest part): 10 to 32 inches thick
rock fragment content, average: 60 to 85 percent
Lower part (loamy-skeletal):
clay content, average: 12 to 24 percent
rock fragment content, average: 40 to 60 percent
Diagnostic horizons and features:
Ochric epipedon
Depth to aquic conditions - 5 to 10 inches
Depth to common or many iron-manganese concentrations - 5 to 16 inches
Thickness of andic soil properties (A and Bw horizon) and depth to the loamy-skeletal material (Bqc horizon): 20 to 40 inches
Andic soil properties:
bulk density at 33 kPa water tension: 0.60 to 0.90 g/cc
ammonium oxalate extractable Al + 1/2Fe: 2 to 6 percent
phosphate retention: 85 to 100 percent
coarse silt and sand content: 30 to 60 percent in the 0.02 to 2.0 mm fraction
volcanic glass content: 5 to 30 percent
water content at 1500 kPa tension: 15 to 18 percent
A horizon
Value: 2 or 3 moist, 4 or 5 dry
Rock fragment content: 5 to 15 percent
Gravel Content: 5 to 15 percent
Cobble Content: 0 to 5 percent
Stone Content: 0 to 5 percent
Boulder Content: 0 to 1 percent
Reaction: moderately acid or slightly acid (pH 5.6 to 6.5)
Base saturation (ammonium acetate); 10 to 40 percent
Bw horizon
Depth to: 5 to 16 inches
Hue: 7.5YR to 10YR moist or dry
Value: 2 to 4 moist, 4 to 6 dry
Chroma: 2 to 6 moist, 3 or 4 dry
Texture: extremely cobbly medial sandy loam, extremely stony medial sandy loam, extremely cobbly medial loam, extremely stony medial loam
Rock fragment content: 60 to 85 percent
Gravel Content: 5 to 20 percent
Cobble Content: 20 to 45 percent
Stone Content: 20 to 45 percent
Boulder Content: 0 to 5 percent
Reaction: moderately acid or slightly acid (pH 5.6 to 6.5)
Bqc horizon
Depth to: 20 to 40 inches
Hue: 7.5YR or 10YR moist or dry
Value: 3 or 4 moist, 4 to 6 dry
Chroma: 4 to 6 moist or dry
Texture: very cobbly sandy loam, extremely cobbly sandy loam, very cobbly loam, extremely cobbly loam
Clay content: 12 to 24 percent clay
Paragravel content: 2 to 20 percent
Rock fragment content: 35 to 70 percent
Gravel content: 15 to 45 percent
Cobble content: 15 to 40 percent
Stone content: 0 to 15 percent
Boulder content: 0 to 5 percent
Andic soil properties:
Volcanic glass content: 0 to 5 percent
Ammonium oxalate extractable Al + 1/2Fe: 2 to 6 percent
Phosphate retention: 85 to 100 percent
Moist bulk density: 1.30 to 1.60 g/cc
Reaction: moderately acid or slightly acid (pH 5.6 to 6.5)
Bq horizon
Hue: 7.5YR, 10YR or 2.5Y moist or dry
Value: 3 or 4 moist, 5 or 6 dry
Chroma: 2 or 3 moist or dry
Texture: very gravelly silt loam, very cobbly silt loam, very gravelly loam, very cobbly loam
Rock fragment content: 35 to 60 percent
Clay content: 12 to 24 percent
Gravel content: 20 to 40 percent
Cobble content: 10 to 40 percent
Stone content: 0 to 10 percent
Boulder content: 0 to 5 percent
Andic soil properties:
Volcanic glass content: 0 to 5 percent
Ammonium oxalate extractable Al +1/2Fe: 0.2 to 0.4 percent
Phosphate retention: 10 to 25 percent
Moist bulk density; 1.30 to 1.60 g/cc
Reaction: moderately acid or slightly acid (pH 5.6 to 6.5)
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landscape - mountains and plateaus
Landform - drainageways
Elevation - 4280 to 7250 feet
Slope - 0 to 8 percent
Parent material - till derived from volcanic rock or tephra
Climate - cold wet winters, cool dry summers
Mean annual air temperature - 35 to 45 degrees F
Mean annual precipitation - 38 to 70 inches
Frost-free period - 5 to 35 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Grousehill and Hoxie soils. Grousehill soils are moderately well drained and 20 to 40 inches deep to a duripan. Hoxie soils are poorly drained and have less than 15 percent rock fragments in the particle-size control section.
DRAINAGE AND PERMEABILITY:
Drainage - somewhat poorly
Permeability - very slow
Watertable - a seasonal water table perched on the Bq horizon is at its uppermost limit in May or June, and present in May to August
USE AND VEGETATION: Lostbear soils are used for wildlife habitat, watershed and recreation. The potential natural plant community is the Engelmann spruce/bog blueberry/forb plant association. Common overstory species include Engelmann spruce, lodgepole pine, mountain hemlock, subalpine fir, western white pine or white fir. Common understory species include bog blueberry, dwarf bilberry, grouse whortleberry, rose spirea, Saskatoon serviceberry, thinleaf huckleberry or twinflower.
DISTRIBUTION AND EXTENT: Klamath County, Oregon; MLRA 3. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Winema National Forest, Klamath County, Oregon, 2008
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Andic soil properties - 3 to 22 inches (A and Bw horizons)
Ochric epipedon
Aquic conditions with episaturation - 8 to 33 inches (Bw and Bqc horizons)
Cambic horizon - 8 to 63 inches (Bw, Bqc and Bq horizons)
Particle-size control section - 3 to 43 inches (A, Bw, Bqc and portion of Bq horizons)
Medial part - 3 to 8 inches (A horizon)
Medial-skeletal part - 8 to 22 inches (Bw horizon)
Loamy-skeletal part - 22 to 43 inches (Bqc and Bq horizons)
The A horizon does not meet criteria for aquic conditions.
ADDITIONAL DATA:
NASIS SITE ID - 04-JFD-08; NASIS PEDON ID - 04OR635008