LOCATION BAREFLAT OR
Tentative Series
Rev. CEG
02/2022
BAREFLAT SERIES
Landscape--Intermontane Basin
Landform--hills, dipslopes, scarpslopes
Slope--2 to 35 percent
Parent material--sandy volcanic ash and colluvium and residuum derived and weathered from andesite
Mean annual precipitation--about 710 mm
Mean annual air temperature--about 6.4 degrees C
Depth class--moderately deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Ashy, glassy, frigid Vitrandic Haploxerepts
TYPICAL PEDON: Bareflat ashy loamy sand on a forested dipslope with 0.2 percent surface cover of stones and boulders, a slope of 10 percent, and an elevation of 1827 m
Oe--0 to 3 cm; moderately decomposed plant material; abrupt smooth boundary
A--3 to 17 cm; ashy loamy sand, reddish brown (5YR 4/4) dry, very dark brown (7.5YR 2.5/2) moist; weak fine granular structure; soft, very friable, nonsticky, nonplastic; common very fine and fine, and few medium roots; common fine irregular and dendritic tubular pores; 2 percent andesite gravel; noneffervescent; slightly acid (pH 6.4); clear smooth boundary
Bw1--17 to 52 centimeters; ashy sandy loam, yellowish red (5YR 4/6) dry, dark reddish brown (5YR 3/3) moist; moderate medium subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; common very fine and fine, few medium and coarse, and common very coarse roots; few fine and medium dendritic tubular pores; 5 percent andesite gravel; noneffervescent; neutral (pH 6.6); clear wavy boundary
Bw2--52 to 75 centimeters; ashy sandy loam, reddish brown (5YR 4/4) dry, dark reddish brown (5YR 3/3) moist; weak coarse subangular blocky parting to moderate medium subangular blocky structure; moderately hard, very friable, nonsticky, nonplastic; few fine and medium roots; few fine dendritic tubular pores; 10 percent andesite gravel and 2 percent andesite cobbles; noneffervescent; moderately acid (pH 6.0); abrupt wavy boundary
R--75 cm; indurated, fractured andesite; fractures 12 to 20 cm apart; few fine and medium roots in cracks; noneffervescent.
TYPE LOCATION: Lake County, Oregon; about 305 m south and 454 m east of the northwest corner of sec. 6, T.37S., R.17E., Willamette Meridian; Gearhart Mountain, Oregon USGS quadrangle; Latitude 42.393460 degrees north, longitude -120.757600 degrees west, datum WGS84 (coordinates derived from GPS unit)
RANGE IN CHARACTERISTICS:
Soil Temperature: frigid regime
Mean annual soil temperature-- 6.7 to 8.0 degrees C
Mean summer soil temperature-- 11.6 to 13.0 degrees C
Mean winter soil temperature-- 2.2 to 3.6 degrees C
Moisture control section--20 to 60 cm; xeric regime; dry in all parts for 45 to 60 days in August, September, or October
Rock fragments--volcanic rock, typically andesite
Umbric epipedon--18 to 50 cm thick
Depth to lithic contact--50 to 100 cm from mineral soil surface
Particle-size control section
*Clay content--6 to 15 percent
*Sand content--55 to 90 percent
*Rock fragment content--2 to 30 percent
*Pararock fragment content--0 to 45 percent
Estimated andic properties, from the mineral soil surface to the lithic contact:
*Ammonium oxalate extractable Al plus 1/2 Fe--0.2 to 0.4 percent
*Medium to very coarse sand in the .02 to 2.0 mm fraction--greater than 50 percent
*Volcanic glass content--30 to 60 percent
*1/3-bar bulk density--0.85 to 1.4 g/cm3
*1500 kPa water (air-dried samples)--10 to 15 percent
Oi or Oe horizons
Cumulative thickness--1 to 6 cm
A horizons
Hue--5YR, 7.5YR or 10YR moist or dry
Value--2 to 3 moist, 3 to 5 dry
Chroma--1 to 3 moist, 2 to 4 dry
Clay content--2 to 14 percent
Total content of rock fragments--2 to 14 percent
Gravel content--2 to 14 percent
Cobble content--0 to 2 percent
Reaction--moderately acid to neutral (pH 5.6 to 7.3)
Organic matter--2 to 10 percent
Thickness--5 to 50 cm
Bw horizons
Hue--5YR, 7.5YR or 10YR moist or dry
Value--3 or 4 moist, 3 to 5 dry
Chroma--3 or 4 moist, 3 to 6 dry
Fine-earth texture--ashy loamy sand, ashy sandy loam, ashy sandy clay loam
Clay content--6 to 22 percent
Total content of rock fragments--2 to 50 percent
Gravel content--2 to 20 percent
Cobble content--0 to 40 percent
Stone content--0 to 20 percent
Paragravel content--0 to 45 percent
Reaction--moderately acid to neutral (pH 5.6 to 7.3)
Organic matter--0.5 to 2 percent
Thickness--10 to 80 cm
COMPETING SERIES:
None
GEOGRAPHIC SETTING:
Elevation--1550 to 2290 m
Climate--cold wet winters, cool dry summers
Mean annual air temperature--5.6 to 7.2 degrees C
Mean annual precipitation--460 to 960 mm
Frost-free period--50 to 80 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Luckycamp--deep to very deep to paralithic contact with andesite; argillic horizon; fine-loamy particle size class
Skidbrackle--shallow to lithic contact with andesite; ashy-skeletal particle size class
Fuego--moderately deep to a lithic contact with andesite; ashy-skeletal particle size class
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--high to very high in the A horizon and moderately slow to very high in Bw horizons
USE AND VEGETATION:
Use--timber production, wildlife habitat, recreation
Vegetation--white fir, ponderosa pine, Greenleaf manzanita, Oregon grape, creeping snowberry, wheeler's bluegrass, long-stolon sedge
DISTRIBUTION AND EXTENT: Klamath County, Oregon; Klamath and Shasta Valleys and Basins, Oregon; MLRA 21; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California
SERIES PROPOSED:
Lake County, Fremont-Winema National Forest, Oregon, 2021
Origin of the name--derived from the name given on the topographic map to a nearby campsite
REMARKS:
Diagnostic horizons and features in this pedon
*Umbric epipedon--zone from 3 to 52 cm
*Volcanic glass--zone from 3 to 75 cm
*Cambic horizon--zone from 17 to 75 cm
*Particle-size control section--25 to 75 cm
*Lithic contact--contact with andesite at 75 cm
ADDITIONAL DATA:
NASIS SITE ID--S2021OR037002; NASIS PEDON ID--S2021OR037002; complete Kellogg Soil Survey Laboratory (KSSL) characterization
National Cooperative Soil Survey
U.S.A.