LOCATION SARVANT WA
Established Series
IRD. SMB/TMR/MPR
07/2017
SARVANT SERIES
Landscape--Cascade Mountains
Landform--mountain slopes, glacial valley walls, cirques, ridges
Slope--10 to 100 percent
Parent material--volcanic ash and colluvium over andesite
Mean annual precipitation--about 2300 mm
Mean annual air temperature--about 3 degrees C
Depth class--moderately deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Medial-skeletal, glassy Humic Vitricryands
TYPICAL PEDON: Sarvant gravelly medial sandy loam on an east-facing ridge with a slope of 40 percent and at an elevation of 1755 m (When described on July 9, 2013, the soil was moist throughout.)
A1--0 to 9 cm; gravelly medial sandy loam, very dark gray (10YR 3/1) dry, black (10YR 2/1) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine and few fine to coarse roots; many very fine and fine interstitial pores; 20 percent andesite gravel and 5 percent andesite cobbles; strongly acid (pH 5.2); clear wavy boundary
A2--9 to 36 cm; very gravelly medial sandy loam, dark brown (7.5YR 3/2) dry, very dark brown (7.5YR 2.5/2) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and fine and few medium and coarse roots; many very fine and fine interstitial pores; 40 percent andesite gravel and 10 percent andesite cobbles; strongly acid (pH 5.2); clear wavy boundary
Bw--36 to 65 cm; very gravelly medial sandy loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and few fine and medium roots; common very fine and fine irregular pores; 25 percent andesite gravel and 15 percent andesite cobbles; strongly acid (pH 5.4); abrupt irregular boundary
2R--65 cm; fractured andesite
TYPE LOCATION: Pierce County, Washington, on Emerald Ridge between the South Puyallup River and Tahoma Creek, about 8 km northwest of Longmire in Mount Rainier National Park; about 205 m south and 565 m west of the northeast corner of section 6, T. 15 N., R. 8 E., Willamette Meridian; Mount Rainier West, Washington, U.S. Geological Survey quadrangle; latitude 46.818623 degrees north, longitude -121.842430 degrees west, datum WGS 84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 7 degrees C
Soil moisture control section--dry less than 45 consecutive days in June through October
Depth to lithic contact--50 to 100 cm
Thickness of umbric epipedon--25 to 100 cm
All mineral horizons
*Organic carbon content--1.75 to 6.0 percent
*Reaction--4.5 to 5.5
*Volcanic glass content--50 to 75 percent
*Ammonium oxalate Al plus 1/2 Fe--greater than 1.0 percent
Particle-size control section
*Clay content--1 to 10 percent
*Total pararock and rock fragment content--35 to 60 percent
A1 horizon
*Hue--10YR, 7.5YR
*Value--2 to 3 moist, 3 to 5 dry
*Chroma--1 or 2 moist or dry
*Fine-earth texture--medial sandy loam, medial coarse sandy loam
*Pararock and rock fragment content--15 to 35 percent total, including 0 to 15 percent pumice paragravel, 15 to 35 percent andesite gravel, and 0 to 15 percent andesite cobbles
*Thickness--10 to 20 cm
A2 horizon
*Hue--7.5YR, 10YR
*Value--2 to 3 moist, 3 to 5 dry
*Chroma--1 or 2 moist or dry
*Fine-earth texture--medial sandy loam, medial coarse sandy loam, medial loam
*Pararock and rock fragment content--35 to 60 percent total, including 0 to 20 percent pumice paragravel, 20 to 50 percent andesite gravel, 5 to 20 percent andesite cobbles, and 0 to 10 percent andesite stones
*Thickness--20 to 40 cm
Bw horizon
*Hue--7.5YR, 10YR
*Value--3 or 4 moist, 4 to 6 dry
*Chroma--2 to 6 moist or dry
*Fine-earth texture--medial sandy loam, medial loamy coarse sand, medial loam
*Pararock and rock fragment content--35 to 60 percent total, including 0 to 20 percent pumice paragravel, 20 to 50 percent andesite gravel, 5 to 20 percent andesite cobbles, and 0 to 10 percent andesite stones
*Thickness--20 to 40 cm
COMPETING SERIES:
Chenuis--no lithic contact within 150 cm (very deep)
GEOGRAPHIC SETTING:
Elevation--1110 to 2340 m
Climate--cool, dry summers; cold, wet winters
Mean annual precipitation--1550 to 4000 mm
Mean annual air temperature--0 to 6 degrees C
Frost-free period--30 to 60 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Tatoosh--lithic contact within 50 cm (shallow); in similar landform positions not associated with talus fields
Burroughs--lithic contact within 100 cm (moderately deep); in similar landform positions not associated with talus fields
Littletahoma--no lithic contact within 150 cm (very deep); in similar landform positions not associated with talus fields
Chenuis--no lithic contact within 150 cm (very deep); in similar landform positions
Mountwow--aquic conditions with an upper limit of 25 cm from the soil surface; in concave areas of similar landforms that receive water from adjacent slopes
Unicornpeak--ochric epipedon; albic and spodic horizons; on similar forested landforms
Williwakas--aquic conditions within 25 cm of the mineral soil surface; in concave areas of similar landforms that receive water from adjacent slopes
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation--subalpine and alpine meadows composed of Cascade mountain ash, Cascade huckleberry, beargrass, Columbia brome, alpine aster, leafy aster, arctic lupine, Sitka valerian, common yarrow, smooth woodrush, phlox, kinnikinnick, and occasional scattered subalpine fir, mountain hemlock, whitebark pine, and common juniper
DISTRIBUTION AND EXTENT: Central Cascade Mountains, Washington; MLRA 3; moderate extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Mount Rainier National Park, Pierce County, Washington; 2014; name from Sarvant Glacier in Mount Rainier National Park
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from the surface to a depth of 65 cm
*Umbric epipedon--zone from the surface to a depth of 36 cm
*Cambic horizon--zone from 36 to 65 cm
*Andic soil properties--zone from the surface to a depth of 65 cm
*Volcanic glass--zone from the surface to a depth of 65 cm
*Depth to lithic contact--65 cm
7/2017--This official series description was updated according to SSR1 Technical Note 11--Content and Format of Official Series Descriptions (revised 12/2015). Most of the changes were in formatting; no major technical changes were made.
National Cooperative Soil Survey
U.S.A.