LOCATION MOUSEHAWK OR
Tentative Series
IRD. CEG/BTH
02/2025
MOUSEHAWK SERIES
Landscape--lava plateaus
Landform--volcanic fields and volcanic cones
Slope--2 to 25 percent
Parent material--coarse pumiceous volcanic ash and pumice parafragments, and residuum weathered from tuff
Mean annual precipitation--about 430 mm
Mean annual air temperature--about 6.2 degrees C
Depth class--shallow
Drainage class--somewhat excessively drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Ashy, glassy, frigid Lithic Vitrixerands
TYPICAL PEDON: Mousehawk ashy sandy loam on a forested volcanic field with a slope of 3 percent and an elevation of 1347 m
Oi--0 to 3 cm; slightly decomposed plant material; abrupt smooth boundary
A--3 to 13 cm; ashy sandy loam, yellowish brown (10YR 5/4) dry, dark brown (10YR 3/3) moist; moderate fine granular structure; soft, very friable, slightly sticky and nonplastic; few very fine and fine roots; few fine dendritic tubular pores; 2 percent fine pumice paragravel; noneffervescent; slightly acid (pH 6.4); clear smooth boundary
Bw1--13 to 29 cm; ashy sandy loam, light yellowish brown (10YR 6/4) dry, dark brown (10YR 3/3) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and nonplastic; few very fine, fine, and medium roots; few fine dendritic tubular pores; 2 percent fine pumice paragravel; noneffervescent; slightly acid (pH 6.5); gradual smooth boundary
Bw2--29 to 38 cm; gravelly ashy loamy sand, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; moderate medium subangular blocky structure; slightly hard, very friable, slightly sticky and nonplastic; few very fine, fine, medium, coarse, and very coarse roots; few fine dendritic tubular pores; 2 percent fine pumice paragravel; 20 percent tuff gravel and 5 percent tuff cobbles; noneffervescent; neutral (pH 6.6); abrupt smooth boundary
2R--38 to 63 cm; indurated tuff
TYPE LOCATION: Klamath County, Oregon; about 542 m south and 274 m east of the northwest corner of sec. 27, T.35S., R.10E., Willamette Meridian; Buttes of the Gods, Oregon USGS quadrangle; Latitude 42.5108694 degrees north, longitude 121.5222028 degrees west, datum WGS84 (coordinates derived from GPS unit)
RANGE IN CHARACTERISTICS:
*Soil Temperature--frigid regime
*Mean annual soil temperature-- 6.6 to 8.0 degrees C
*Mean summer soil temperature-- 9.9 to 11.3 degrees C
*Mean winter soil temperature-- 1.6 to 3.0 degrees C
*Moisture control section--30 to 38 cm; dry in all parts for 60 to 90 consecutive days in July through October
*Depth to lithic contact--25 to 50 cm
*Rock fragments--pumice paragravel; tuff gravel and cobbles
Particle-size control section
*Clay content--5 to 16 percent
*Rock fragment content--0 to 30 percent
*Pararock fragment content--0 to 5 percent
Estimated properties
*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
*P retention--25 to 50 percent
*Volcanic glass content--75 to 100 percent
*Moist bulk density--0.7 to 1.0 g/cm3
*1/3-bar bulk density--0.75 to 0.9 g/cm3
*1500 kPa water (air-dried samples)--3 to 12 percent
Oi horizon (where present)
Thickness--0 to 3 cm
A horizon
*Hue--10YR moist or dry
*Value--3 moist, 4 or 5 dry
*Chroma--2 or 3 moist, 1 to 4 dry
*Fine-earth texture--ashy sandy loam
*Clay content--5 to 17 percent
*Total content of rock and pararock fragments--0 to 3 percent
*Paragravel content--0 to 5 percent
*Gravel content--0 to 1 percent
*Reaction--moderately acid to neutral (pH 5.6 to 7.3)
*Thickness--6 to 20 cm
Bw horizons
*Hue--10YR moist, 10YR or 2.5Y dry
*Value--3 or 4 moist, 5 or 6 dry
*Chroma--3 or 4 moist, 2 to 6 dry
*Fine-earth texture--ashy loamy coarse sand, ashy coarse sandy loam, ashy sandy loam
*Clay content--5 to 16 percent
*Total content of rock and pararock fragments--0 to 30 percent
*Paragravel content--0 to 5 percent
*Gravel content--0 to 20 percent
*Cobble content--0 to 8 percent
*Reaction--slightly acid to neutral (pH 6.1 to 7.3)
*Thickness--15 to 40 cm
COMPETING SERIES:
Despair--formed in glacial drift materials; gneiss, granite, or granodiorite bedrock; ashy sandy loam or finer textures; less than 50 percent medium to very coarse sand in the .02 to 2.0 mm fraction; less than eight percent clay throughout the soil profile; mean annual precipitation greater than 500 mm
Fremkle--mollic epipedon; ashy sandy loam textures only (finer than ashy loamy coarse sand); less than 50 percent medium to very coarse sand in the .02 to 2.0 mm fraction
Hafling--mollic epipedon; basalt bedrock; 15 to 35 percent basalt rock fragments throughout the soil profile; textures finer than ashy loamy sand; less than 50 percent medium to very coarse sand in the .02 to 2.0 mm fraction
GEOGRAPHIC SETTING:
Elevation--1300.0 to 1700.0 m
Climate--cold wet winters and cool dry summers
Mean annual air temperature--4.4 to 6.9 degrees C
Mean annual precipitation--355 to 610 mm
Frost-free period--55 to 80 days
GEOGRAPHICALLY ASSOCIATED SOILS:
FUEGO--moderately deep to volcanic bedrock; loamy-skeletal particle size class; on ridges, volcanic cones, and volcanic domes
CRUME--deep to a paralithic contact with diatomite, siltstone, or claystone; on low hills, rock pediments, and strath terraces
LOBERT--very deep; mollic epipedon; on sand ramps on alluvial fans and stream terraces
MASET--moderately deep to tuff; on rock pediments, benches, and on dipslopes, hills, and scarps on volcanic fields
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat excessively drained
Saturated hydraulic conductivity (Ksat)--high or very high
USE AND VEGETATION:
Use--timber production, wildlife habitat, recreation
Vegetation--ponderosa pine, antelope bitterbrush, Idaho fescue
DISTRIBUTION AND EXTENT: Cascade Mountains, Eastern Slope; MLRA 6; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED:
Klamath County, Northern Part, Oregon, 2020
Origin of the name--derived from a nearby physiographic feature, Mousehawk Butte
REMARKS:
Diagnostic horizons and features in this pedon
*Ochric epipedon
*Andic soil properties--zone from 3 to 38 cm
*Cambic horizon--zone from 13 to 38 cm
*Lithic contact--38 cm
ADDITIONAL DATA:
NASIS SITE ID--12OR035009; NASIS PEDON ID--12OR035009
National Cooperative Soil Survey
U.S.A.