LOCATION FUEGO                   OR

Established Series
Rev. JSC/AON
10/2024

FUEGO SERIES

Landscape--Lava Plateau
Landform--volcanic domes, volcanic cones, volcanic fields, dip slopes, scarp slopes, gorges, canyons
Slope--2 to 60 percent
Parent material--colluvium and residuum from volcanic rock, volcanic ash, and pumiceous tephra
Mean annual precipitation--about 430 mm
Mean annual air temperature--about 7 degrees C
Depth class--moderately deep
Drainage class--somewhat excessively drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Ashy-skeletal, glassy, frigid Vitrandic Haploxerolls

TYPICAL PEDON: Fuego very stony ashy sandy loam, on an east facing slope of 8 percent at 1,341 m elevation; rangeland with scattered trees

A1--0 to 13 cm; very stony ashy sandy loam, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; moderate very fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine roots throughout; many very fine irregular pores; 10 percent pumice paragravel, 20 percent andesite gravel, 10 percent andesite cobbles, 10 percent andesite stones; neutral (pH 7.0); clear smooth boundary

A2--13 to 25 cm; gravelly ashy sandy loam, brown (10YR 5/3) dry, very dark grayish brown (10YR 3/2) moist; weak thin platy parting to moderate very fine granular structure; soft, very friable, nonsticky and nonplastic; common very fine and few fine and medium roots throughout; many very fine interstitial pores; 10 percent pumice paragravel, 25 percent andesite gravel, 5 percent andesite cobbles; neutral (pH 7.2); gradual wavy boundary

Bw--25 to 64 cm; very gravelly ashy sandy loam, pale brown (10YR 6/3) dry, dark brown (10YR 3/3) moist; weak medium prismatic parting to weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and few fine and medium roots throughout; many very fine interstitial pores; 20 percent pumice paragravel, 40 percent andesite gravel, 5 percent andesite cobbles; neutral (pH 7.2); abrupt irregular boundary

R--64 cm; indurated andesite bedrock

TYPE LOCATION: Klamath County, Oregon; about 6 miles west of the community of Beatty, on the southeast slope of Council Butte; about 701 m west and 373 m south of the NE corner section 15, T.36S., R.11E.; Sprague River East, Oregon USGS Quadrangle; latitude 42.4532623, longitude 121.3976440 north, datum WGS 84 (coordinates derived from GSP unit)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature-- 4 to 8 degrees C
Moisture control section--20 to 60 cm; dry 65 to 90 days within the four-month period following the summer solstice
Mollic epipedon--18 to 50 cm thick
Base saturation (by NH4OAc) in the mollic epipedon--75 to 100 percent
Depth to bedrock--50 to 100 cm

Particle-size control section:
*Clay content--12 to 18 percent
*Rock fragment content--35 to 60 percent indurated volcanic rock, typically andesite
*Pararock fragment content--5 to 25 percent moderately cemented pumice paragravel

Estimated properties, all mineral horizons:
*Volcanic glass content--30 to 60 percent
*Ammonium oxalate extractable Al plus 1/2 Fe--0.2 to 0.4 percent
*1/3-bar bulk density--1.00 to 1.20 g/cm3
*1500 kPa water (air-dried samples)--10 to 15 percent
*Medium to very coarse sand in the .02 to 2.0 mm fraction--greater than 50 percent

A horizons
Value--2 or 3 moist, 3 to 5 dry
Chroma--2 or 3 moist or dry
Fine-earth texture --ashy sandy loam, ashy coarse sandy loam, ashy loamy sand, ashy loamy coarse sand
Clay content: 2 to 10 percent
Total fragment content--20 to 65 percent
Paragravel content--5 to 15 percent
Rock fragments--15 to 55 percent
Gravel content--15 to 30 percent
Cobble content--0 to 10 percent
Stone content--0 to 15 percent
Reaction--slightly acid to neutral (pH 6.1 to 7.3)
Organic matter--2 to 10 percent in the upper A horizon, 1 to 6 percent in lower A horizons
Combined thickness--25 to 50 cm

Bw horizon(s )
Value--2 or 3 moist, 3 to 6 dry
Chroma--2 or 3 moist, 2 to 4 dry
Fine-earth texture--ashy sandy loam, ashy coarse sandy loam, ashy loamy sand
Clay content: 5 to 12 percent
Total fragment content--40 to 70 percent
Paragravel content--5 to 25 percent
Rock fragments--35 to 65 percent
Gravel content--35 to 50 percent
Cobble content--0 to 10 percent
Stone content--0 to 5 percent
Reaction--slightly acid to slightly alkaline (pH 6.1 to 7.8)
Organic matter--0.5 to 2 percent

COMPETING SERIES:
Clearline--100 to 150 cm to a lithic contact (basalt)
Fulcrum--dry for more than 90 days
Glencabin--mollic epipedon greater than 50 cm thick
Hatrock--more than 150 cm to a lithic contact (basalt)
Linecreek--more than 150 cm to a lithic contact (basalt)
Lonigan--calcic horizon; 50 to 100 cm to a paralithic contact
Stines--calcic horizon; 100 to 150 cm to a paralithic contact

GEOGRAPHIC SETTING:
Elevation--1300 to 2275 m
Climate--subhumid
Mean annual air temperature-- 4 to 7 degrees C
Mean January air temperature-- -4 to -3 degrees C
Mean July air temperature-- 15 to 17 degrees C
Mean annual precipitation--320 to 970 mm
Frost-free period--50 to 80 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Bly--on alluvial fans and terraces; 100 to 200 cm to a duripan; fine-loamy; mollic epipedon greater than 50 cm thick
Choptie--on low hills, ridges, and rock pediments; 30 to 50 cm to lithic contact
Lobert--on sand ramps on stream terraces; more than 150 cm to lithic contact; mollic epipedon greater than 50 cm thick
Mousehawk--on volcanic fields and volcanic cones; 25 to 50 cm to lithic contact; less than 30 percent rock fragments in the particle-size control section

DRAINAGE AND PERMEABILITY:
Drainage class--somewhat excessively drained
Saturated hydraulic conductivity (Ksat)--moderately high to high throughout

USE AND VEGETATION:
Use--livestock grazing, timber production, wildlife habitat, recreation
Vegetation--mainly juniper, widely spaced ponderosa pine, antelope bitterbrush, big sagebrush, Idaho fescue, bluebunch wheatgrass and Canby bluegrass

DISTRIBUTION AND EXTENT: Southern Oregon, MLRA 21; Klamath and Shasta Valleys and Basins, Oregon; MLRA 21; inextensive

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California

SERIES ESTABLISHED: Klamath County, Oregon, 1977

REMARKS:
Diagnostic horizons and features in this pedon:
*Mollic epipedon-- A1 and A2 horizons
*Vitrandic subgroup criteria--A1, A2, and Bw horizons
*Cambic horizon--Bw horizon
*Lithic contact--R horizon
*Particle-size control section--zone from 25 to 64 cm

02/2024--examined the type location and updated the pedon description (March, 2005); updated series classification, range in characteristics, formatting, and competing series

ADDITIONAL DATA:
NASIS Site ID: 05-SMM-009
NASIS Pedon ID: 05OR681009

Vitrandic properties and chemical properties are inferred from analyses conducted by Kellogg Soil Survey Laboratory (KSSL) on a nearby pedon (KSSL Pedon 04N0096; NASIS Site ID 03-SMM-18; NASIS Pedon ID 03OR035007)

---

National Cooperative Soil Survey
U.S.A.