LOCATION WOCUSBAY ORTentative Series
TAXONOMIC CLASS: Diatomaceous, euic Limnic Cryosaprists
TYPICAL PEDON: Wocusbay muck, wet meadow, at an elevation of 4,515 feet. (When described on July 5, 2005, the soil was wet throughout and the water table was at 23 inches. The lower part of the profile was described using auger borings due to standing water. (Colors are for moist soil unless otherwise noted.)
Oa1--0 to 6 inches; very dark brown (7.5YR 2.5/3) and very dark brown(7.5YR 2.5/2) rubbed, muck, brown (10YR 4/3) dry; about 32 percent unrubbed fiber, 10 percent rubbed; weak coarse subangular blocky structure; soft, friable, nonsticky, nonplastic; weakly smeary; many very fine and fine roots throughout; many very fine and fine irregular pores; strongly acid, pH 5.3; less than 10 percent mineral content; abrupt smooth boundary.
Oa2--6 to 18 inches; black (2.5Y 2.5/1) rubbed, muck, 50 percent gray (2.5Y 5/1) and 50 percent dark gray (2.5Y 4/1) dry; 20 percent unrubbed fiber, 2 percent rubbed; moderate coarse subangular blocky structure; soft, friable, nonsticky, nonplastic; moderately smeary; many very fine, fine, and few medium roots throughout; many very fine and fine irregular pores; strongly acid, pH 5.5; 30 percent mineral content; gradual smooth boundary.
Oa3--18 to 28 inches; black (2.5Y 2.5/1) rubbed, muck, 50 percent dark gray (2.5Y 4/1) and 50 percent gray (2.5Y 5/1) dry; 25 percent unrubbed fiber, 15 percent rubbed; weak fine subangular blocky structure; soft, friable, nonsticky, nonplastic; moderately smeary; many very fine and few fine roots throughout; many very fine and fine irregular pores; strongly acid, pH 5.5; 25 percent mineral content; clear wavy boundary.(The combined thickness of the Oa horizon is 20 to 35 inches)
Oe--28 to 38 inches; 60 percent strong brown (7.5YR 4/6) broken face, 40 percent very dark gray (7.5YR 3/1)broken face, black (7.5YR 2.5/1) rubbed, mucky peat, very dark grayish brown (10YR 3/2) dry; 90 percent unrubbed fiber, 30 percent rubbed; weak fine subangular blocky structure; soft, friable, nonsticky, nonplastic; weakly smeary; many fine irregular pores; moderately acid, pH 6.0; less than 10 percent mineral content; abrupt wavy boundary. (0 to 10 inches thick)
2Ldi1--38 to 53 inches; 50 percent light olive brown (2.5Y 5/4), 30 percent very dark gray (2.5Y 3/1), and 20 percent gray (2.5Y 6/1) diatomaceous very fine sandy loam, white (2.5Y 8/1) dry; massive; hard, friable, nonsticky, slightly plastic; moderately fluid; strongly thixotropic; few very fine irregular pores; moderately acid, pH 6.0; abrupt broken boundary.
2Ldi2--53 to 57 inches; 80 percent light olive brown (2.5Y 5/3) and 20 percent gray (2.5Y 6/1) diatomaceous very fine sandy loam, white (10YR 8/1) dry; massive; hard, friable, nonsticky, slightly plastic; moderately fluid; strongly thixotropic; many very fine and fine root; few very fine irregular pores; slightly acid, pH 6.5; abrupt wavy boundary. (The combined thickness of the Ldi horizon is 12 to 22 inches thick)
3C--57 to 61 inches; yellowish red (5YR 5/6) very paragravelly ashy coarse sandy loam, pinkish white (5YR 8/2) dry; massive; slightly hard, friable, nonsticky, nonplastic; many very fine and fine irregular pores; 40 percent coarse distinct irregular light red (2.5YR 6/8), moist, iron-manganese masses throughout; 5 percent moderately cemented pumice paracobbles and 50 percent moderately cemented pumice paragravel; neutral, pH 6.8.
TYPE LOCATION: Klamath County, Oregon, in the Klamath Marsh National Wildlife Refuge, about 22 miles northeast of the town of Chiloquin, Oregon, about 410 feet east and 1,700 feet north of the southwest corner of section 14, T. 31 S., R. 8 E. (Latitude 42 degrees, 52 minutes, and 57.90 seconds North and Longitude 121 degrees, 44 minutes, and 19.40 seconds West) Willamette Meridian; 608651 meters easting and 4747037 meters northing, NAD83 Zone 10.
RANGE IN CHARACTERISTICS:
Average annual soil temperature 35 to 42 degrees F.
Average summer soil temperature 38 to 43 degrees F.
Particle-size control section 0 to 51 inches
Depth to apparent high water table from 12 inches above the surface to 24 inches deep throughout the year
Organic materials 20 to 38 inches thick
Sapric materials more than half the volume of the organic layers
Fibric and hemic materials occur within the control section in thin lenses and are less than half of the volume of the organic layers.
Diatomaceous earth layers from 20 to 38 inches from the surface and range from 12 to 22 inches thick
Oa horizon
Fiber content, unrubbed 15 to 32 percent
Fiber content, rubbed 0 to 15 percent
Hue 7.5YR, 10YR, 2.5Y, or Neutral
Reaction strongly acid to slightly acid
Oe horizon
Fiber content, unrubbed 35 to 90 percent
Fiber content, rubbed 20 to 50 percent
Hue 7.5YR or 10YR
Value 1 to 3 moist and dry
Chroma - 1 to 6 moist and dry
2Ldi horizon
Hue 10YR or 2.5Y
Value 3 to 6 moist and 6 to 8 dry
Chroma 1 to 3 moist and dry
Texture very fine sandy loam, fine sandy loam, or silt loam
Clay content 5 to 27 percent (field estimates)
Diatomaceous content more than 50 percent (field estimates)
Reaction moderately or slightly acid
3C horizon
Hue 5YR, 7.5YR, or 10YR
Value 4 to 6 moist and 6 to 8 dry
Chroma 4 to 6 moist and 1 to 3 dry
Redoximorphic features 20 to 80 percent medium and coarse iron-manganese masses
Texture very paragravelly ashy coarse sandy loam or very paragravelly ashy loamy coarse sand
Paragravel content 25 to 55 percent moderately cemented dacitic pumice
Paracobble content 5 to 15 percent moderately cemented dacitic pumice
Reaction slightly acid or neutral
COMPETING SERIES: There are no competing series. The similar Yamsay soils have less than 12 inches of limnic materials in the particle-size control section.
GEOGRAPHIC SETTING: Wocusbay soils are on alluvial fans, basins, and depressions in valleys. Slopes range from 0 to 1 percent. Elevation ranges from 4,100 to 4,530 feet. The soil formed in material derived from water tolerant herbaceous plants over diatomaceous earth and dacitic pumice in the lower part. The average annual precipitation is 20 to 36 inches. The average annual air temperature is 36 to 43 degrees F. The frost-free period is 5 to 30 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chinchallo, Wocus, and Yamsay soils. Chinchallo soils are mineral soils throughout. Wocus soils are organic throughout, dominantly hemic. Yamsay soils are organic soils throughout, dominantly sapric with tule vegetation.
DRAINAGE AND PERMEABILITY: Very poorly drained; moderate permeability. These soils are frequently ponded for long periods from January to June. Some areas have been drained.
USE AND VEGETATION: These soils are used mainly for watershed, recreation and wildlife habitat. A few areas are used for pasture. The potential natural vegetation is tufted hairgrass, sedges and rushes.
DISTRIBUTION AND EXTENT: South-central Oregon, MLRA 6 and 21. The soils are inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Klamath County, Oregon, 2005.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Organic layer - the zone from the surface to 38 inches (the Oa1, Oa2, Oa3, and Oe horizons)
Sapric materials the zone from the surface to 28 inches (Oa1, Oa2, and Oa3 horizons)
Limnic soil materials the zone from 38 to 57 inches, (2Ldi1 and 2Ldi2 horizons)
Particle-size control section 0 to 51 inches (the Oa1, the Oa2, the Oa3, the Oe, the 2Ldi1, and part of the 2Ldi2 horizon)
Aquic conditions throughout
ADDITIONAL DATA:
NASIS Site ID: 05-SMM-034
NASIS Pedon ID: 05OR681034
The type location was reviewed and sampled in July 2005.
The type location is also a soil water data logger site for Klamath Basin Water Study.
Water levels are managed by the US Fish and Wildlife Service in the Klamath Marsh and by the Bureau of Reclamation in Upper Klamath Lake and may vary based on annual management objectives.