LOCATION SHOALWATER OR
Tentative Series
Rev. KBC/BTH/CEG
02/2024
SHOALWATER SERIES
Landscape--Intermontane basins
Landform--flood plains
Slope--0 to 1 percent
Parent material--mixed alluvium derived from volcanic rocks, volcanic ash, and diatomaceous sediments
Mean annual precipitation--about 450 mm
Mean annual air temperature--about 9 degrees C
Depth class--very deep
Drainage class--somewhat poorly drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--aquic
TAXONOMIC CLASS: Ashy, glassy, mesic Vitrandic Haploxerolls
TYPICAL PEDON: Shoalwater ashy sandy loam on marshland with a slope of 1 percent and an elevation of 1264 m
A1--0 to 10 cm; ashy sandy loam, dark grayish brown (10YR 4/2) dry, very dark brown (10YR 2/2) moist; moderate fine and medium granular structure; soft, very friable, nonsticky and nonplastic; common very fine and fine and few medium roots throughout; common fine and few medium dendritic tubular pores; noneffervescent; slightly alkaline (pH 7.5); gradual smooth boundary
A2--10 to 35 cm; ashy sandy loam, dark grayish brown (10YR 4/2) dry, very dark brown (10YR 2/2) moist; moderate fine and medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common very fine and fine and few medium roots throughout; common fine dendritic tubular pores; noneffervescent; neutral (pH 7.0); gradual smooth boundary
A3--35 to 55 cm; ashy loamy sand, 60 percent grayish brown (10YR 5/2) and 40 percent dark grayish brown (10YR 4/2) dry, 60 percent very dark grayish brown (10YR 3/2) and 40 percent very dark brown (10YR 2/2) moist; weak medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine and fine and few medium roots throughout; common fine dendritic tubular pores; 2 percent by volume fine rounded pumice paragravel; noneffervescent; moderately alkaline (pH 8.0); gradual smooth boundary
A4--55 to 75 cm; ashy loamy coarse sand, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; moderate medium and coarse subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; few very fine and common fine roots throughout; common very fine and fine dendritic tubular pores; 2 percent medium irregular masses of iron-manganese in matrix with diffuse boundaries, dark yellowish brown (10YR 3/4) moist; 2 percent by volume fine rounded pumice paragravel; noneffervescent; moderately alkaline (pH 8.0); gradual smooth boundary
AC--75 to 90 cm; ashy loamy coarse sand, grayish brown (10YR 5/2) dry, dark brown (10YR 3/3) moist; weak medium and coarse subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common very fine and fine and few medium roots throughout; common very fine and fine dendritic tubular pores; 4 percent medium irregular masses of iron-manganese in matrix with diffuse boundaries, dark yellowish brown (10YR 3/4) moist; 3 percent by volume fine rounded pumice paragravel and 2 percent by volume fine rounded volcanic gravel; noneffervescent; moderately alkaline (pH 8.0); gradual smooth boundary
Cg1--90 to 120 cm; ashy loamy coarse sand, light brownish gray (10YR 6/2) dry, dark brown (10YR 3/3) moist; massive; slightly hard, very friable, nonsticky and nonplastic; common very fine and few fine roots throughout; common very fine and fine dendritic tubular pores; 4 percent medium irregular masses of iron-manganese in matrix with diffuse boundaries, dark yellowish brown (10YR 3/4) moist; 25 percent very coarse irregular iron depletions in matrix with diffuse boundaries, dark grayish brown (10YR 4/2) moist; 4 percent by volume fine and medium subrounded pumice paragravel and 5 percent by volume fine to coarse rounded volcanic gravel; slightly effervescent; moderately alkaline (pH 8.0); clear smooth boundary
Cg2--120 to 200 cm; paragravelly ashy coarse sand, light brownish gray (10YR 6/2) dry, dark grayish brown (10YR 4/2) moist; single grain; loose, loose, nonsticky and nonplastic; 25 percent medium irregular iron depletions in matrix with diffuse boundaries, light gray (10YR 7/2) moist; 25 percent by volume fine and medium subrounded and rounded pumice paragravel; noneffervescent; moderately alkaline (pH 8.0)
TYPE LOCATION: Klamath County, Oregon; about 500 m west and 557 m north of the southeast corner of sec. 25, T. 35 S., R. 7.5 E., Willamette Meridian; Agency Lake, Oregon USGS quadrangle; latitude 42.5055370 degrees north, longitude 121.9425080 degrees west, datum WGS84 (coordinates derived from GPS unit)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 11 degrees C
Moisture control section--30 to 90 cm; dry in all parts for 45 or more consecutive days in the four months following the summer solstice and moist in all parts for 45 or more consecutive days in the four months following the winter solstice; seasonally high water table (endosaturation) in the lower part of the control section between February and June, at 50 cm or more below the surface in normal years
Medium to very coarse sand in the .02 to 2.0 mm fraction--greater than 50 percent
Thickness of mollic epipedon--30 to 95 cm
Depth to redoximorphic depletions--50 to 90 cm below the mineral soil surface
Depth to redoximorphic concentrations--50 to 90 cm below the mineral soil surface
Particle-size control section:
*Clay content--1 to 20 percent
*Pararock fragment content--0 to 15 percent pumice paragravel
*Rock fragment content--0 to 5 percent volcanic gravel
Estimated properties:
*Ammonium oxalate extractable Al plus 1/2Fe--0.05 to 0.20 percent
*P retention--3 to 20 percent
*Volcanic glass content--5 to 60 percent
*1/3-bar bulk density--0.75 to 1.1 g/cm3
*1500 kPa water (air-dried samples)--3 to 12 percent
A horizon(s)
Hue--10YR or 2.5Y moist or dry
Value--2 or 3 moist, 3 to 5 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--ashy sand, ashy loamy coarse sand, ashy loamy sand, ashy sandy loam, ashy loam
Clay content--1 to 20 percent
Pumice paragravel content--0 to 10 percent
Volcanic gravel content--0 to 4 percent
Total rock and pararock fragment content--0 to 14 percent
Reaction--neutral to moderately alkaline (pH 6.6 to 8.4)
Thickness--30 to 95 cm
AC horizon (where present)
Hue--10YR or 2.5Y moist or dry
Value--3 moist, 4 or 5 dry
Fine-earth texture--ashy sand, ashy loamy coarse sand, ashy loamy sand, ashy sandy loam, ashy loam
Clay content--1 to 20 percent
Pumice paragravel content--0 to 10 percent
Volcanic gravel content--0 to 4 percent
Total rock and pararock fragment content--0 to 14 percent
Reaction--neutral to moderately alkaline (pH 6.6 to 8.4)
Thickness--0 to 30 cm
Bw or Bg horizons (where present)
Hue--10YR or 2.5Y moist or dry
Value--3 to 5 moist or dry
Chroma--1 to 3 moist or dry
Fine-earth texture--ashy sand, ashy loamy coarse sand, ashy loamy sand, ashy sandy loam, ashy fine sandy loam, ashy loam
Clay content--1 to 15 percent
Pumice paragravel content--0 to 10 percent
Volcanic gravel content--0 to 4 percent
Total rock and pararock fragment content--0 to 14 percent
Reaction--neutral to moderately alkaline (pH 6.6 to 8.4)
Thickness--20 to 50 cm
Cg horizon(s)
Hue--10YR or 2.5Y moist or dry
Value--3 to 6 moist, 4 to 7 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--ashy coarse sand, ashy sand, ashy loamy coarse sand, ashy loamy sand, ashy sandy loam, ashy fine sandy loam
Clay content--0 to 12 percent
Pumice paragravel content--0 to 55 percent
Volcanic gravel content--0 to 10 percent
Total rock and pararock fragment content--0 to 55 percent
Reaction--slightly to moderately alkaline (pH 7.4 to 8.4)
COMPETING SERIES:
Achelake--unsaturated conditions year-round (well drained); parent materials include loess; less than 50 percent medium to very coarse sand in the .02 to 2.0 mm fraction
Dinkels--unsaturated conditions year-round (well drained); parent materials include colluvium and loess; 100 to 150 cm to bedrock; 15 to 35 percent coarse fragments in the particle-size control section
Hardesty--; high water table is greater than 75 cm from the soil surface; greater than 100 cm to redoximorphic depletions; parent materials include loess; greater than 60 percent volcanic glass; textures include loam and silt loam; less than 50 percent medium to very coarse sand in the .02 to 2.0 mm fraction
Hardister--unsaturated conditions year-round (well drained); bulk densities greater than 1.1 g/cm3
Mansonia--unsaturated conditions year-round (well drained); 100 to 150 cm to bedrock or dense glacial till
Nemire--unsaturated conditions year-round (well drained); parent materials include loess, glacial outwash, and glaciolacustrine deposits; less than 50 percent medium to very coarse sand in the .02 to 2.0 mm fraction
Shiva--unsaturated conditions year-round (well drained)
Watco--unsaturated conditions year-round (well drained); parent materials include loess and glacial till
GEOGRAPHIC SETTING:
Elevation--1250 to 1300 m
Climate--warm, dry summers; cool, wet winters
Mean annual air temperature--7 to 11 degrees C
Mean annual precipitation--430 to 470 mm
Frost-free period--50 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Algoma--on drained lake bottoms and flood plains; redoximorphic features and seasonally high water table above 50 cm (poorly drained); silty diatomaceous sediments on the surface and a lithologic discontinuity with sandy sediments between 50 and 100 cm ; mollic epipedon 18 to 40 cm thick
Epiphany--on flood plains; tentative series; redoximorphic features and seasonally high water table above 50 cm (poorly drained); calcareous; exchangeable sodium present in surface horizon(s); diatomaceous materials in the lower part of the profile
Fordney--on lake terraces, stream terraces, and fan remnants; unsaturated conditions year-round (excessively drained)
Henley--on terraces; ochric epipedon; 50 to 100 cm to duripan (moderately deep); sodic; silt loam and loam textures
Poe--on terraces; ochric epipedon; 50 to 100 cm to duripan (moderately deep)
Tulana--on lake bottoms; seasonally high water table above 50 cm (poorly drained); strong influence of diatomaceous materials, sponge spicules, and amorphous materials; 10 to 35 percent clay and less than 15 percent sand in the particle-size control section (fine-silty)
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--poorly and very poorly drained
Saturated hydraulic conductivity (Ksat)--moderately high to very high in the A, AC, Bw and Bg horizons; high to very high in the Cg horizons
Saturation in normal years-endosaturation; water table is highest in May and June, ranging from 50 to 100 cm below the surface during that time
Flooding--frequent, brief; March to May
USE AND VEGETATION:
Use--wildlife habitat, irrigated pasture, irrigated cropland
Vegetation--baltic rush, Sandberg bluegrass, basin wildrye, basin big sagebrush, green rabbitbrush, antelope bitterbrush
DISTRIBUTION AND EXTENT: Klamath and Shasta Valleys and Basins, Oregon; MLRA 21; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California
SERIES PROPOSED: Klamath County, Oregon; 2019
Origin of the name--nearby USGS quadrangle name, "Shoalwater Bay"
REMARKS:
Diagnostic horizons and features in this pedon
*Particle-size control section--the zone from 25 to 100 cm
*Mollic epipedon--A1, A2, A3, A4, and AC horizons
*Aquic conditions--A4, AC, Cg1, and Cg2 horizons
*Volcanic glass--all horizons
*Redoximorphic depletions--Cg1 and Cg2 horizons
*Redoximorphic concentrations--A4, AC, Cg1, and Cg2 horizons
ADDITIONAL DATA:
NASIS site ID--2019OR035055
NASIS pedon ID--2019OR035055
National Cooperative Soil Survey
U.S.A.