LOCATION FOGGYFLAT               WA

Established Series
IRD TLS/PNP/KDPL/SBC
09/2019

FOGGYFLAT SERIES

Landscape--plateaus, hills
Landform--structural benches, hillslopes
Slope--0 to 60 percent
Parent material--mantle of volcanic ash over volcanic ash mixed with basalt residuum and colluvium or ashflow deposits
Mean annual precipitation--about 1800 mm
Mean annual air temperature--about 4 degrees C
Depth class--deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Ashy, amorphic Typic Vitricryands

TYPICAL PEDON: Foggyflat ashy sandy loam in an area of forestland, on a 13-percent, east-facing, undulating slope at an elevation of 1225 m (All textures are apparent field textures.)

Oi--0 to 8 cm; slightly decomposed needles, twigs, and wood

A--8 to 28 cm; ashy sandy loam, yellowish brown (10YR 5/4) dry, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common fine and coarse roots; few fine irregular pores; 5 percent gravel; moderately acid (pH 6.0), NaF pH 11.5; clear smooth boundary

Bw1--28 to 46 cm; ashy sandy loam, yellowish brown (10YR 5/6) dry, dark yellowish brown (10YR 3/4) moist; weak fine and medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common fine and coarse roots; common fine irregular pores; 10 percent gravel; moderately acid (pH 6.0), NaF pH 11.5; gradual wavy boundary

2Bw2--46 to 81 cm; very gravelly ashy fine sandy loam, yellowish brown (10YR 5/6) dry, dark yellowish brown (10YR 3/4) moist; weak fine and medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic, weakly smeary; common fine and coarse roots; few very fine and common fine irregular pores; 40 percent gravel and 10 percent cobbles; slightly acid (pH 6.2), NaF pH 12.0; clear wavy boundary.

2Bw3--81 to 130 cm; very gravelly ashy fine sandy loam, yellowish brown (10YR 5/4) dry, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; weakly smeary; common fine and medium and few coarse roots; few fine irregular pores; 40 percent gravel and 10 percent cobbles; slightly acid (pH 6.2), NaF pH 12.0; abrupt smooth boundary

2R--130 cm; fractured basalt

TYPE LOCATION: Yakama Indian Reservation, Yakima County, Washington, about 8 km east of Potato Hill; about 410 m east and 430 m south of the northwest corner of section 24, T. 10 N., R. 11 E.; latitude 46.3410348, longitude -121.3893999, datum WGS 84 (coordinates estimated from section, township, and range)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature at a depth of 50 cm--4 to 7 degrees C
Mean summer soil temperature--6 to 8 degrees C
Depth to lithic contact--100 to 150 cm
Volcanic ash mantle--36 to 64 cm thick; moist bulk density of 0.75 to 0.90 g/cm3; glass content of 5 to 30 percent; ammonium oxalate aluminum plus 1/2 iron of 2 to 4 percent
15-bar water retention--8 to 12 percent (air-dried samples)
Reaction--5.6 to 6.5 throughout

Weathered (saprolitic) basalt fragments are above the bedrock in some pedons.

A horizon
Hue--10YR, 7.5YR
Value--3 or 4 moist, 4 or 5 dry
Chroma--2 or 3 moist, 3 or 4 dry
Rock fragment content--0 to 10 percent
Thickness--8 to 23 cm

Bw horizon
Hue--10YR, 7.5YR
Value--3 or 4 moist, 5 or 6 dry
Chroma--4 to 6 moist or dry
Texture--ashy sandy loam, ashy loam
Rock fragment content--0 to 10 percent
Thickness--13 to 53 cm

2Bw horizon
Hue--10YR, 7.5YR
Value--3 or 4 moist, 3 to 5 dry
Chroma--3 to 6 moist or dry
Texture of fine-earth fraction--ashy fine sandy loam, ashy sandy loam; 35 to 60 percent rock fragments
Combined thickness--43 to 117 cm

COMPETING SERIES:
Castlecrest, Huston, Taaax--no lithic contact within a depth of more than 150 cm (very deep)
Wawukyataak, Winegar--50 to 100 cm (moderately deep) to a densic layer

GEOGRAPHIC SETTING:
Elevation--1225 to 1825 m
Climate--cool, wet winters; relatively warm, dry summers
Mean annual precipitation--1300 to 2300 mm
Mean annual air temperature--3 to 7 degrees C
Frost-free season--35 to 75 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Twolakes--on benches, plateaus, and side slopes; ashy over loamy-skeletal particle-size class; argillic horizon
Walupt--on plateaus, ridges, and side slopes; ashy over loamy particle-size class; argillic horizon

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately rapid

USE AND VEGETATION:
Use--timber production, wildlife habitat, watershed
Native vegetation--mountain hemlock, Pacific silver fir, subalpine fir, grand fir, Engelmann spruce, Cascade azalea, big huckleberry, queencup beadlily, beargrass, smooth woodrush

DISTRIBUTION AND EXTENT: Yakama Indian Reservation, Yakima County, Washington; MLRAs 3 and 6; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Yakama Nation, Yakima County, Washington; 2014

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Cambic horizon--zone from 28 to 46 cm
*Andic soil properties--zone from 8 to 130 cm
*Particle-size control section--zone from 8 to 109 cm; 30 percent rock fragments (weighted average)

The soils in the Foggyflat series would classify as ashy over ashy-skeletal family if it was an option in Soil Taxonomy.

ADDITIONAL DATA:
Partial laboratory data--sample number 70D-24-1, Yakama Nation Soil Laboratory, Toppenish, Washington

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National Cooperative Soil Survey
U.S.A.