LOCATION MOUSETAILS OR
Tentative Series
IRD. KBC/BTH
02/2025
MOUSETAILS SERIES
Landscape--pumice mantled plateau
Landform-scarp slopes of tephra volcanic fields
Slope--15 to 55 percent
Parent material--coarse pumiceous volcanic ash and pumice parafragments over colluvium derived from andesite or basalt
Mean annual precipitation--about 730 mm
Mean annual air temperature--about 6 degrees C
Depth class--very deep
Drainage class--excessively
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Ashy-pumiceous, glassy, frigid Typic Vitrixerands
TYPICAL PEDON: Mousetails very paragravelly ashy loamy coarse sand on a forested tephra volcanic field on a south-facing scarp slope with a slope of 22 percent and an elevation of 1490 m
Oi--0 to 8 cm; slightly decomposed plant material; clear smooth boundary
A--8 to 22 cm; very paragravelly ashy loamy coarse sand, light brownish gray (10YR 6/2) dry, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine, common fine, and few medium roots; many very fine and common fine dendritic tubular pores; 45 percent fine to medium pumice paragravel; moderately acid (pH 5.6); clear wavy boundary
Bw1--22 to 43 cm; very paragravelly ashy coarse sand, 70 percent pale yellow (2.5Y 8/3) and 30 percent very pale brown (10YR 7/4) dry, 70 percent light brownish gray (2.5Y 6/2) and 30 percent very pale brown (10YR 7/4) moist; single grain; loose, nonsticky and nonplastic; many very fine and fine and common medium roots; 55 percent fine to medium pumice paragravel; slightly acid (pH 6.5); gradual wavy boundary
Bw2--43 to 82 cm; very paragravelly ashy coarse sand, 70 percent pale yellow (2.5Y 8/3) and 30 percent very pale brown (10YR 7/4) dry, 70 percent light brownish gray (2.5Y 6/2) and 30 percent very pale brown (10YR 7/4) moist; single grain; loose, nonsticky and nonplastic; common very fine and few fine and medium roots; 55 percent fine pumice paragravel; slightly acid (pH 6.5); gradual smooth boundary
BC--82 to 123 cm; very paragravelly ashy coarse sand, 80 percent pale yellow (2.5Y 8/2) and 20 percent light gray (2.5Y 7/1) dry, 80 percent pale yellow (2.5Y 7/4) and 20 percent light brownish gray (2.5Y 6/2) moist; single grain; loose, nonsticky and nonplastic; common fine and few very fine and medium roots; 55 percent fine pumice paragravel; slightly acid (pH 6.5); gradual smooth boundary
C--123 to 145 cm; very paragravelly ashy coarse sand, pale yellow (2.5Y 8/2) dry, pale yellow (2.5Y 8/4) moist; single grain; loose, nonsticky and nonplastic; 55 percent fine pumice paragravel; neutral (pH 7.0); abrupt smooth boundary
2Bwb--145 to 200 cm; gravelly ashy sandy loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; strong medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common fine, and few very fine and medium roots; many fine and common very fine dendritic tubular pores; 20 percent andesite gravel; moderately acid (pH 5.6)
TYPE LOCATION: Klamath County, Oregon; about 3.0 miles north and 1.6 miles east of the town of Fort Klamath, OR; about 645 m west and 415 m south of the northeast corner of sec. 2, T.33S., R.7E., Willamette Meridian; Fort Klamath, Oregon USGS quadrangle; latitude 42.7444880 degrees north, longitude 121.9643380 degrees west, datum WGS84 (coordinates derived from GPS unit)
RANGE IN CHARACTERISTICS:
*Soil Temperature: frigid regime
*Mean annual soil temperature-- 6.4 to 8.0 degrees C
*Mean summer soil temperature-- 11.4 to 13.0 degrees C
*Mean winter soil temperature-- 2.5 to 4.1 degrees C
*Moisture control section--30 to 90 cm below the soil surface; dry 45 to 60 consecutive days following the summer solstice
*Rock fragments--pumice paragravel; andesite or basalt gravel
*Depth to C horizon--35 to 140 cm from the mineral soil surface
*Depth to loamy, buried soil--100 to over 200 cm from the mineral soil surface
Particle-size control section
*Clay content--1 to 6 percent
*Pararock fragment content--30 to 85 percent
Estimated properties, horizons and layers above the lithologic discontinuity
*Ammonium oxalate extractable Al plus 1/2 Fe--0.2 to 0.4 percent
*Medium to very coarse sand in the .02 to 2.0 mm fraction--greater than 50 percent
*P retention--25 to 50 percent
*Volcanic glass content--75 to 100 percent
*Moist bulk density--0.7 to 1.0 g/cm3
*1/3-bar bulk density--0.5 to 0.9 g/cm3
*1500 kPa water (air-dried samples)--3 to 12 percent
Oi horizon (where present)
*Thickness--0 to 15 cm
A horizon
Value--2 to 4 moist, 4 to 6 dry
Chroma--1 to 3, moist or dry
Fine-earth texture--ashy coarse sandy loam, ashy loamy sand, ashy loamy coarse sand
Clay content--3 to 10 percent
Paragravel content--15 to 50 percent
Reaction--moderately acid to neutral (pH 5.6 to 7.3)
Thickness--3 to 15 cm
Bw horizons
Hue--7.5YR to 5Y moist or dry
Value--4 to 8 moist, 6 to 8 dry
Chroma--0 to 8 moist, 0 to 6 dry
Fine-earth texture--ashy coarse sand, ashy loamy coarse sand
Clay content--0 to 5 percent
Paragravel content--35 to 85 percent
Reaction--moderately acid to neutral (pH 5.6 to 7.3)
Thickness--20 to 135 cm
BC horizon (where present)
Hue--7.5YR to 5Y moist or dry
Value--0 to 8 moist or dry
Chroma--2 to 8 moist or dry
Clay content--0 to 5 percent
Paragravel content--35 to 85 percent
Reaction--moderately acid to neutral (pH 5.6 to 7.3)
Thickness--0 to 50 cm
C horizon
Hue--10YR to 5Y moist or dry
Value--4 to 8 moist, 6 to 8 dry
Chroma--0 to 4 moist or dry
Clay content--0 to 5 percent
Paragravel content--35 to 85 percent
Reaction--slightly acid to neutral (pH 6.1 to 7.3)
Thickness--greater than 10 cm
2Bwb horizon (where present)
Hue--5YR to 10YR moist or dry
Value--3 to 6 moist, 4 to 7 dry
Chroma--2 to 6 moist, 2 to 4 dry
Fine-earth texture--ashy sandy loam, sandy loam, fine sandy loam, loam
Clay content--10 to 25 percent
Total content of rock and pararock fragments--20 to 70 percent
Paragravel content--0 to 10 percent
Gravel content--20 to 35 percent
Cobble content--0 to 5 percent
Stone and Boulder content--0 to 20 percent
Reaction--moderately acid to neutral (pH 5.6 to 7.3)
COMPETING SERIES:
Choralmont--glacial drift parent materials in the subsurface; less than 50 percent medium to very coarse sand in the .02 to 2.0 mm fraction; finer textures (ashy loamy fine sand in the surface horizon, ashy sandy loam and ashy loamy sand in the subsurface); 30 to 60 percent volcanic glass; 1 to 2 percent acid oxalate extractable Al plus 1/2
Fe; 890 to 1270 mm mean annual precipitation; 90 to 120 frost-free days
Palmich--colluvium from granodiorite or rhyolite in the subsurface; less than 50 percent medium to very coarse sand in the .02 to 2.0 mm fraction; finer textures (ashy sandy loam throughout); over 60 percent volcanic glass; 1 to 2 percent acid oxalate extractable Al plus 1/2
Fe; dry 75 to 90 days following the summer solstice; 635 to 890 mm mean annual precipitation; 140 to 170 frost-free days
Ramparter--less than 50 percent medium to very coarse sand in the .02 to 2.0 mm fraction; finer textures (ashy very fine sandy loam in the surface horizon, ashy sandy loam or finer textures in the upper part); over 60 percent volcanic glass; 1 to 2 percent acid oxalate extractable Al plus 1/2
Fe; dry 60 to 75 days following the summer solstice; 760 to 1015 mm mean annual precipitation; 130 to 170 frost-free days
GEOGRAPHIC SETTING:
Elevation--1270 to 1600 m
Climate--cold moist winters and cool dry summers
Mean annual air temperature--5.2 to 7.0 degrees C
Mean annual precipitation--460 to 1000 mm
Frost-free period--40 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Lapine--similar landforms; cryic soil temperature regime
Steiger--similar landforms; cryic temperature regime; less than 35 percent pumice paragravel in the particle size control section
Uffda--ashy-skeletal over loamy-skeletal particle size class
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--excessively drained
Saturated hydraulic conductivity--high or very high in the A and Bw horizons, very high in the BC and C horizons, and moderately high or high in the 2Bwb horizon
USE AND VEGETATION:
Use--timber production, wildlife habitat, recreation
Vegetation--incense cedar, sugar pine, ponderosa pine, Douglas fir, serviceberry, Greenleaf manzanita, tall Oregongrape, golden chinquapin, snowbrush, common prince's pine, antelope bitterbrush, dwarf rose, arrowleaf balsamroot, woodland strawberry, squirrel tail
DISTRIBUTION AND EXTENT: Cascade Mountains, Eastern Slope; MLRA 6; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED:
Klamath County, Northern Part, Oregon, 2020
Origin of the name--the name is coined
REMARKS:
Diagnostic horizons and features in this pedon
*Particle-size control section--zone from 8 to 108 cm
*Ochric epipedon
*Andic soil properties--zone from 8 to 145 cm
*Volcanic glass--zone from 8 to 200 cm
*Depth to lithological discontinuity--145 cm
ADDITIONAL DATA:
NASIS SITE ID--2018OR035051; NASIS PEDON ID--2018OR035051
National Cooperative Soil Survey
U.S.A.