LOCATION SWANSPRINGS OR
Tentative Series
CEG
02/2025
SWANSPRINGS SERIES
Landscape--mountains
Landform--dip slopes and scarp slopes of stratovolcanoes
Slope--2 to 15 percent
Parent material--sandy colluvium derived from volcanic rock and/or from coarse pumiceous volcanic ash and pumice parafragments over loamy colluvium derived from volcanic rock and/or tephra
Mean annual precipitation--about 940 mm
Mean annual air temperature--about 2.7 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: Ashy-skeletal over loamy-skeletal, amorphic over isotic Alfic Vitricryands
TYPICAL PEDON: Swansprings stony ashy loamy coarse sand on a forested dip slope of a stratovolcano with a slope of 15 percent and an elevation of 1,911.4 m; surface cobbles cover 1 percent of the surface
Oi--0 to 4 cm; slightly decomposed plant material; abrupt smooth boundary
Oe--4 to 8 cm; moderately decomposed plant material; abrupt smooth boundary
A--8 to 19 centimeters; stony ashy loamy coarse sand, brown (10YR 4/3) dry, very dark grayish brown (10YR 3/2) moist; weak coarse granular structure; soft, very friable, nonsticky and nonplastic; many very fine, common fine and medium, and very few coarse roots; common fine dendritic tubular pores; 1 percent fine pumice paragravel, 20 percent volcanic gravel, 5 percent volcanic cobbles, 5 percent volcanic stones, and 2 percent volcanic boulders; noneffervescent; slightly acid (pH 6.4); clear smooth boundary
AB--19 to 45 centimeters; very gravelly ashy loamy coarse sand, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/3) moist; weak coarse granular and weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine, fine, and medium, common coarse, and few very coarse roots; few fine dendritic tubular pores; 1 percent pumice paragravel, 25 percent volcanic gravel, 5 percent volcanic cobbles, 5 percent volcanic stones, and 2 percent volcanic boulders; noneffervescent; slightly acid (pH 6.4); gradual wavy boundary
Bw--45 to 80 centimeters; extremely stony ashy loamy sand, brown (7.5YR 5/4) dry, brown (7.5YR 4/3) moist; weak medium subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine, few fine, common medium, and few coarse roots; common very fine and fine dendritic tubular pores; 1 percent pumice paragravel, 30 percent volcanic gravel, 20 percent volcanic cobbles, 15 percent volcanic stones, and 5 percent volcanic boulders; noneffervescent; slightly acid (pH 6.4); gradual wavy boundary
2Bt1--80 to 140 centimeters; very gravelly ashy sandy loam, brown (7.5YR 5/4) dry, brown (7.5YR 4/3) moist; moderate medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine, very few fine, and few medium roots; few very fine and few fine dendritic tubular pores; 3 percent faint, brown (7.5YR 4/3) moist, clay films on all faces of peds and 30 percent faint clay bridges between sand grains; 40 percent volcanic gravel, 10 percent volcanic cobbles, 2 percent volcanic stones, and 1 percent volcanic boulders; noneffervescent; slightly acid (pH 6.2); gradual wavy boundary
2Bt2--140 to 180 centimeters; extremely stony ashy sandy loam, brown (7.5YR 5/4) dry, brown (7.5YR 4/3) moist; moderate medium subangular blocky structure; moderately hard, friable, slightly sticky and slightly plastic; common very fine, very few fine, and few medium and roots; few very fine and common fine dendritic tubular pores; 20 percent faint, brown (7.5YR 4/3) moist, clay films on all faces of peds and 60 percent faint clay bridges between sand grains; 25 percent volcanic gravel, 20 percent volcanic cobbles, 20 percent volcanic stones, and 5 percent volcanic boulders; noneffervescent; slightly acid (pH 6.2); gradual wavy boundary
2Bt3--180 to 220 centimeters; extremely stony ashy loam, brown (7.5YR 5/4) dry, reddish brown (5YR 4/4) moist; weak coarse subangular blocky structure; moderately hard, friable, slightly sticky and slightly plastic; few very fine, and very few fine and medium roots; few very fine and fine dendritic tubular pores; 80 percent distinct, brown (7.5YR 4/3) moist, clay films on all faces of peds and 60 percent distinct clay bridges between sand grains; 10 percent andesite paragravel, 15 percent andesite gravel, 25 percent andesite cobbles, 20 percent andesite stones, and 5 percent andesite boulders; noneffervescent; slightly acid (pH 6.2)
TYPE LOCATION: Klamath County, Oregon; 0.75 mile north and 1.9 miles west of the Swan Lake Point communications tower; 549 m north and 308 m west of SE corner of Section 25, T. 36 S., R. 8 E., Willamette Meridian; Swan Lake Point, Oregon USGS quadrangle; latitude 42.419490 degrees north, longitude 121.706000 degrees west, datum WGS84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
*Soil Temperature: cryic regime
*Mean annual soil temperature-- 1.2 to 5.2 degrees C
*Mean summer soil temperature-- 4.0 to 8.0 degrees C
*Mean winter soil temperature-- -2.1 to 1.9 degrees C
*Moisture control section--20 to 60 cm; not dry in any part for as long as 90 days in normal years; dry in all parts for 30 to 45 consecutive days in August, September or October
*Rock fragments--pumice paragravel in the upper part of the profile; andesite paragravel in the lower part of the profile; hard lava or andesite gravel, cobbles and stones
*Umbric epipedon--25 to 48 cm thick
*Lithologic discontinuity, depth below mineral soil surface--36 to 95 cm
Particle-size control section
*Rock fragment content, upper part--35 to 70 percent
*Rock fragment content, lower part--35 to 80 percent
*Pararock fragment content, upper part--0 to 10 percent
*Pararock fragment content, lower part--0 to 15 percent
Estimated properties, upper part of the profile
*Ammonium oxalate extractable Al plus 1/2 Fe--0.4 to 2.0 percent
*.02 to 2.0-mm fraction--60 to 90 percent
*Medium to very coarse sand in the .02 to 2.0 mm fraction--greater than 50 percent
*P retention--25 to 50
*Volcanic glass content--15 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
A and AB horizons
*Hue--7.5YR, 10YR
*Value--2, 2.5, or 3 moist, 3 to 5 dry; some coarse and very coarse sand grains are 4 moist, 6 dry
*Chroma--2 or 3 moist, 2 to 4 dry; some coarse and very coarse sand grains are 4 to 6 moist
*Fine-earth texture--ashy coarse sandy loam, ashy loamy coarse sand
*Clay content--1 to 15 percent
*Total content of rock and pararock fragments--15 to 80 percent
*Paragravel content--0 to 5 percent
*Gravel content--10 to 30 percent
*Cobble content--1 to 40 percent
*Stone content--0 to 40 percent
*Boulder content--0 to 25 percent
*Reaction--strongly acid to neutral (pH 5.1 to 7.3)
*Thickness--25 to 48 cm
Bw horizon or C horizon (where present)
*Hue--7.5YR, 10YR
*Value--3 or 4 moist, 5 or 6 dry
*Chroma--3 or 4 moist or dry; some coarse and very coarse sand grains are 5 or 6 moist
*Fine-earth texture--ashy coarse sandy loam, ashy loamy sand, ashy loamy coarse sand
*Clay content--1 to 15
*Total content of rock and pararock fragments--15 to 80 percent
*Paragravel content--0 to 5 percent
*Gravel content--10 to 40 percent
*Cobble content--5 to 45 percent
*Stone content--0 to 40 percent
*Boulder content--0 to 25 percent
*Thickness--13 to 64 cm
2Bt horizon
*Hue--5YR, 7.5YR, 10YR
*Value--3 to 5 moist, 4 or 5 dry
*Chroma--2 to 4 moist or dry
*Fine-earth texture--ashy clay loam, ashy loam, ashy sandy loam
*Clay content--10 to 35
*Total content of rock and pararock fragments--35 to 80 percent
*Paragravel content--0 to 15 percent
*Gravel content--10 to 55 percent
*Cobble content--5 to 40 percent
*Stone content--0 to 40 percent
*Boulder content--0 to 60 percent
*Reaction--strongly acid to slightly acid (pH 5.1 to 6.5)
COMPETING SERIES:
HASSHOLLOW--mid slopes of lateral moraines; loam and silt loam textures in ash-influenced layers
VESTER--loam and fine sandy loam textures in ash-influenced layers; includes
Strawberry volcanics
WASKU--sandy loam textures in ash-influenced layers; volcanic glass 5 to 30 percent; 15-bar water 12 to 15 percent; Acid oxalate aluminum plus 1/2 iron 2 to 3 percent; mean annual precipitation 1300-2000 mm
GEOGRAPHIC SETTING:
Elevation--1875 to 2050 m
Climate--cold moist winters and cool dry summers
Mean annual air temperature--0.7 to 4.7 degrees C
Mean annual precipitation--860 to 1020 mm
Frost-free period--30 to 50 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Swantower--scarp slopes and dip slopes on stratovolcanoes; cambic horizon in lower part of profile
Yawhee--dip slopes on stratovolcanoes; frigid soil temperature regime
Edgewood--scarp slopes and dip slopes on stratovolcanoes; frigid soil temperature regime
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat excessively drained
Saturated hydraulic conductivity (Ksat)--high to very high in the upper part and moderately high to high in the lower part
USE AND VEGETATION:
Use--timber production, wildlife habitat, livestock grazing, recreation
Vegetation--lodgepole pine, white fir, grand fir, wax currant, long-stolon sedge
DISTRIBUTION AND EXTENT: Olympic and Cascade Mountains, Oregon; MLRA 3; small extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED:
Klamath County, Northern Part, Oregon, 2020
Origin of the name--the name is coined, derived from nearby geographic features, Swanlake Point and Algoma Spring.
REMARKS:
Diagnostic horizons and features in this pedon
*Umbric epipedon--zone from 8 to 43 cm
*Argillic horizon--zone from 8 to 220 cm
*Andic soil properties--zone from 8 to 80 cm
*Volcanic glass--zone from 8 to 220 cm
*Depth to lithologic discontinuity--80 cm
*Particle-size control section--8 to 108 cm
*Laboratory data--laboratory data exist for the frigid counterpart of this series (Yawhee soil; S2005OR683014)
ADDITIONAL DATA:
NASIS SITE ID--2005OR0353063; NASIS PEDON ID--2005OR0353063
National Cooperative Soil Survey
U.S.A.