Established Series


The Clunie series consists of very deep, very poorly drained soils formed in fibrous peat over loamy tidal sediments. Clunie soils
are in broad depressions on tidal plains. Slopes range from 0 to 3 percent. Mean annual temperature is about 32 degrees F., and the average annual precipitation is about 28 inches.

TAXONOMIC CLASS: Loamy, mixed, euic Terric Borofibrists

TYPICAL PEDON: Clunie peat -- on a 0 percent slope at 15 feet elevation under moss and sedge vegetation. (all colors are for moist soil)

Oi1 -- 0 to 3 inches; raw moss and sedge peat; many fine and medium roots; very strongly acid; clear smooth boundary.

Oi2 -- 3 to 11 inches; yellowish brown (10YR 5/4) sphagnum moss and sedge peat; 90 percent fiber rubbed; few woody fragments; very strongly acid; clear smooth boundary.

Oi3 -- 11 to 33 inches; dark grayish brown (10YR 4/2) sphagnum moss and sedge peat; few woody fragments; very strongly acid; abrupt smooth boundary.

2C -- 33 to 63 inches; dark gray (N 4/0) silty clay loam; massive; firm; 5 percent decomposed organic matter in thin strata; few fine roots; neutral.

TYPE LOCATION: Yentna Area, Alaska. SW 1/4, SW 1/4, Section 31, T. 8 N., R. 15 W., Seward Meridian.

RANGE IN CHARACTERISTICS: Depth to the mineral underlying material ranges from 24 to 40 inches. The water table is at or near the surface from May through September. The surface tier is slightly decomposed moss and sedge peat that is less than three-fourths Sphagnum spp. fibers. Buried logs and branches occur in some pedons. The pH (0.01M CaCl2) is 4.5 or greater within parts of the control section.

The O horizons have hue from 5YR to 10YR, value moist from 3 through 5, and chroma moist from 1 through 4. Reaction ranges from very strongly acid to slightly acid.

The 2C horizon has gleyed colors of gray, greenish gray, and bluish gray. Texture is silt loam stratified with silt, silty clay loam, and very fine sandy loam with a weighted average of 20 to 35 percent clay. Reaction ranges from medium acid to neutral.

COMPETING SERIES: This is the Winginaw(T) series. Winginaw(T) soils are calcareous in the underlying mineral material.

GEOGRAPHIC SETTING: The Clunie soils are in broad, nearly level depressions on tidal plains. The soils formed in moss and sedge peat over loamy tidal sediments. The climate is transitional with the average annual precipitation ranging from 19 to 29 inches. Mean annual temperature ranges from 32 to 35 degrees F. Slopes range from 0 to 3 percent but are commonly less than 1 percent.

DRAINAGE AND PERMEABILITY: Very poorly drained. Ponded to very slow runoff. Permeability is rapid in the organic materials and very slow in the mineral underlying material.

USE AND VEGETATION: The Clunie soils are used for wildlife habitat and recreation. The native vegetation is mosses, sedges, rushes, and low growing woody shrubs.


DISTRIBUTION AND EXTENT: Southcentral Alaska. The series is of moderate extent.
SERIES ESTABLISHED: Kenai-Kasilof Area, Alaska. 1960.

REMARKS: Diagnostic horizons and features recognized in this profile include: organic material from 0 to 33 inches; mineral material from 33 to 63 inches with less than 35 percent clay; pH of the organic materials that is 4.5 (0.01M CaCl) or greater in parts of the control section.



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Contact: Mike Gracz
Kenai Watershed Forum 
PO Box 15301
Fritz Creek, AK  99603

04 May 2007 10:19