LOCATION LOSTWAGON OR
Tentative Series
IRD. DCR
02/2025
LOSTWAGON SERIES
Landscape--Mazama High Cascade mountains
Landform--glacial-valley floors, moraines, glacial-valley walls, cirque headwalls
Slope--2 to 70 percent
Parent material--pumice and coarse volcanic ash over colluvium and till mixed with volcanic ash
Mean annual precipitation--about 1600 mm
Mean annual air temperature--about 4 degrees C
Depth class--very deep
Drainage class--somewhat excessively drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Pumiceous or ashy-pumiceous over medial-skeletal, amorphic Andic Haplocryods
TYPICAL PEDON: Lostwagon paragravelly loamy coarse sand, on a north-facing forested moraine with a slope of 60 percent and an elevation of 1450 m (All textures are apparent field textures).
Oi--0 to 2 cm; slightly decomposed plant material; abrupt wavy boundary
Oe--2 to 5 cm; moderately decomposed plant material; common very fine to medium roots; abrupt wavy boundary
E --5 to 6 cm; paragravelly loamy coarse sand, light gray (10YR 7/2) dry, grayish brown (10YR 5/2) moist; weak fine subangular blocky structure; soft, very friable, nonsticky, nonplastic; common very fine, fine, and medium roots; many very fine interstitial pores; 30 percent pumice paragravel; very strongly acid (pH 4.8); abrupt wavy boundary
Bs--6 to 25 cm; very paragravelly ashy loamy coarse sand, light brown (7.5YR 6/3) dry, dark brown (7.5YR 3/3) moist; weak fine subangular blocky structure; soft, very friable, nonsticky, nonplastic; many very fine and common fine to coarse roots; many very fine interstitial pores; 40 percent pumice paragravel, 2 percent basalt gravel, and 1 percent basalt cobbles; moderately acid (pH 5.7); clear wavy boundary
BC--25 to 48 cm; very paragravelly ashy loamy coarse sand, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; weak very fine granular structure; loose, very friable, nonsticky, nonplastic; many very fine and common fine to coarse roots; many very fine interstitial pores; 50 percent pumice paragravel, 2 percent basalt gravel, and 1 percent basalt cobbles; slightly acid (pH 6.1); clear wavy boundary
C--48 to 84 cm; extremely paragravelly ashy coarse sand, light yellowish brown (10YR 6/4) dry, brown (10YR 4/3) moist; massive; soft, very friable, nonsticky, nonplastic; common very fine and fine and few medium roots; many fine interstitial pores; 70 percent pumice paragravel; slightly acid (pH 6.3); abrupt wavy boundary
2Bw--84 to 150 cm; very cobbly medial fine sandy loam, brown (10YR 5/3) dry, dark brown (7.5YR 3/3) moist; weak fine subangular blocky structure; soft, very friable, nonsticky, nonplastic; common very fine and few medium roots; common very fine dendritic tubular and few fine dendritic tubular pores; 25 percent gravel, 15 percent cobbles, and 5 percent stones; slightly acid (pH 6.4)
TYPE LOCATION: Lane County, Oregon, about 5 km southwest of Diamond Peak in Willamette National Forest; 290 m north and 330 m east of the southwest corner of section 14, T. 24 S., R. 5 E., Willamette Meridian; latitude 43.48656, longitude -122.18680, datum WGS 84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--4 to 6 degrees C
Thickness of andic soil properties--greater than 150 cm
Depth to lithologic discontinuity--50 to 85 cm below the mineral soil surface
Particle-size control section (upper part)
*Clay content--0 to 5 percent
*1/3-bar bulk density--0.5 to 0.9 g/cm3
*Phosphate retention--50 to less than 85 percent
*Ammonium oxalate Al plus 1/2 Fe--1.0 to 3.0 percent
*1500 kPa water (air-dried samples)--5 to 12 percent
*1500 kPa water (undried)--10 to 20 percent
*Fine-earth fraction--contains more than 50 percent medium through very coarse sand
*Volcanic glass content in 0.02 to 2.0 mm fraction--60 to 90 percent
Particle-size control section (lower part)
*Clay content--2 to 10 percent
*1/3-bar bulk density--0.8 to 1.1 g/cm3
*Phosphate retention--greater than 85 percent
*Ammonium oxalate Al plus 1/2 Fe--2.0 to 4.0 percent
*1500 kPa water (air-dried samples)--greater than 15 percent
*1500 kPa water (undried)--20 to 30 percent
*0.02 to 2.0 mm fraction--greater than 30 percent
*Volcanic glass content in 0.02-to 2.0-mm fraction--30 to 60 percent
O horizons
*Composition--slightly to moderately decomposed plant material
*Combined thickness--0 to 10 cm
E horizon
*Value--4 or 5 moist, 6 or 7 dry
*Chroma--1 or 2 moist and dry
*Total fragment content--15 to 35 percent
*Pumice paragravel content--15 to 35 percent
*Gravel content--0 to 5 percent
*Reaction--pH 4.5 to 5.0
*Phosphate retention--less than 25 percent
*Ammonium oxalate Al plus 1/2 Fe--less than 1 percent
*Thickness--1 to 5 cm
Bs horizon
*Value--3 to 5 moist, 5 or 6 dry
*Chroma--3 or 4 moist or dry
*Total fragment content--20 to 60 percent
*Pumice paragravel content--20 to 50 percent
*Gravel content--0 to 5 percent
*Cobble content--0 to 5 percent
*Reaction--pH 5.1 to 5.9
*Thickness--5 to 25 cm
BC horizon
*Value--4 or 5 moist, 5 to 7 dry
*Chroma--3 or 4 moist or dry
*Fine-earth texture--ashy loamy coarse sand, ashy coarse sand
*Total fragment content--35 to 60 percent
*Pumice paragravel content--35 to 60 percent
*Gravel content--0 to 5 percent
*Cobble content--0 to 5 percent
*Reaction--pH 5.6 to 6.5
*Thickness--15 to 50 cm
C horizon
*Value--4 or 5 moist, 6 or 7 dry
*Chroma--3 or 4 moist or dry
*Pumice paragravel content--35 to 80 percent
*Reaction--pH 6.1 to 6.5
*Thickness--35 to 75 cm
2Bw horizon
*Hue--10YR or 7.5YR
*Value--3 or 4 moist, 5 or 6 dry
*Chroma--3 or 4 moist or dry
*Fine-earth texture--medial fine sandy loam, medial sandy loam
*Clay content--2 to 10 percent
*Total fragment content--35 to 60 percent
*Gravel content--15 to 40 percent
*Cobble content--5 to 20 percent
*Stone content--0 to 15 percent
*Reaction--pH 6.1 to 6.5
COMPETING SERIES:
Wilchutes--100 to 150 cm to lithic contact
GEOGRAPHIC SETTING:
Elevation--1525 to 2150 m
Climate--cool, dry summers; cold, wet winters
Mean annual precipitation--1400 to 1900 mm
Mean annual air temperature--3 to 5 degrees C
Frost-free period--30 to 75 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Wilchutes--100 to 150 cm to lithic contact; located on ice-scoured mountains and volcanic cones
Waldor--50 to 75 cm to redox concentrations; located on glaciated mountains
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat excessively drained
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--very high in the upper part and high in the lower part
USE AND VEGETATION:
Use--recreation, wildlife habitat
Potential natural vegetation--mountain hemlock, thinleaf huckleberry, grouse whortleberry, pipsissewa; commonly supports a mountain hemlock/thinleaf huckleberry (CMS232) plant association (see Forested Plant Associations of the Oregon East Cascades)
DISTRIBUTION AND EXTENT: Mazama High Cascade Mountains, Oregon; MLRA 3; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Willamette National Forest, Lane County, Oregon; 2022; name from the Lost Wagon Train which passed near the type location in the year 1853.
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 30 to 105 cm
*Albic horizon--5 to 6 cm
*Spodic horizon--6 to 25 cm
*Andic soil properties--zone from 6 to 150 cm
*Volcanic glass--zone from 5 to 150 cm
*Depth to lithologic discontinuity--84 cm
Competing series, with the exception of minerology class
*Cattcreek--mineralogy class is "glassy over amorphic"
*Ethania--mineralogy class is "glassy over amorphic" and depth to lithologic discontinuity is 4 to 14 inches (10 to 36 cm)
*Typical pedon ID--2021OR039763
National Cooperative Soil Survey
U.S.A.