LOCATION STUCK AK
Established Series
Rev.MHC/JPM
02/2022
STUCK SERIES
The Stuck series consists of somewhat poorly drained soils formed in a thin mantle of silty loess overlying sandy alluvium and underlain by clayey lacustrine deposits. Stuck soils are in drainages and depressions on broad high lacustrine terraces. Slopes range from 0 to 7 percent. Men annual temperature is about 26 degrees F. and the average annual precipitation is about 12 inches.
TAXONOMIC CLASS: Sandy over clayey, mixed, semiactive Aquic Cumulic Haplocryolls
TYPICAL PEDON: Stuck silt loam - on a 2 percent slope under forest vegetation at 1200 feet elevation
Oi--3 to 0 inches; dark reddish brown (5YR 3/2) moist peat consisting of slightly decomposed moss, twigs, and root fibers; abrupt smooth boundary. (2 to 6 inches thick)
A--0 to 2 inches; very dark brown (10YR 2/2) moist silt loam, grayish brown (10YR 5/2) dry; moderate thin platy structure; very friable, nonsticky and nonplastic; many roots of all sizes; neutral (pH 7.0); clear wavy boundary (1 to 5 inches thick)
2C1--2 to 22 inches; very dark brown (2.5Y 3/2) moist sand, grayish brown (2.5Y 5/2) dry; single grain; loose, nonsticky and nonplastic; pockets of very dark gray (10YR 3/1) loamy fine sand; few very fine and fine roots; neutral (pH 7.0); abrupt wavy boundary. (16 to 34 inches thick)
3C2--22 to 34 inches; dark grayish brown (2.5Y 4/2) moist clay; strong coarse granular structure; firm, very sticky and very plastic; mildly alkaline (pH 7.8); gradual wavy boundary. (12 to 34 inches thick)
3C3--34 to 60 inches; dark grayish brown (2.5Y 4/2) moist clay; moderate coarse granular structure; firm, very sticky and very plastic; common medium distinct dark yellowish brown (10YR 4/4) mottles; slightly effervescent; moderately alkaline (pH 8.0).
TYPE LOCATION: Copper River Area, Alaska; about 7 miles south of Copper Center; about 1400 feet north of the SE corner of section 20, T.1N., R.1E., Copper River Meridian.
RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 32 to 35 degrees F. Thickness of the loess mantle ranges from 1 to 5 inches. Thickness of the mollic epipedon and the depth to the clayey substratum ranges from 17 to 37 inches.
The A horizon has moist hue of 7.5YR or 10YR; moist value of 2 or 3; and moist chroma of 1, 2, or 3. Texture is silt loam, silt, or mucky silt loam. Reaction is slightly acid or neutral.
The 2C horizon has moist hue of 2.5Y or 5Y; moist value of 2, 3, or 4; and moist chroma of 1, 2, or 3. Texture is fine sand, sand, coarse sand, or loamy fine sand. Reaction is slightly acid or neutral.
The 3C horizon has moist hue of 2.5Y or 5Y; moist value of 4 or 5; and moist chroma of 1 or 2. Texture is silty clay loam, clay loam, silty clay, or clay. Rock fragment content ranges from 0 to 30 percent subangular cobble and gravel, with 0 to 30 percent gravel and 0 to 15 percent cobble. Effervescence is none or slight. Reaction is mildly alkaline or moderately alkaline.
COMPETING SERIES: There are no competing series in the same family.
GEOGRAPHIC SETTING: Stuck soils formed in a thin mantle of silty loess overlying sandy alluvium and underlain by clayey lacustrine deposits. Slopes range from 0 to 7 percent.
The climate is subarctic continental with long, cold winters and short, warm summers. Mean annual precipitation ranges from 8 to 17 inches and the mean annual snowfall is 39 to 68 inches. Mean January temperature is minus 10 degrees F., mean July temperature is 56 degrees F., and the mean annual temperature varies from 23 degrees to 27 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: This is the
Klanelneechena series on the same landform. Klanelneechena soils are the permafrost counterpart of the Stuck series. The organic mat of the Klanelneechena soils is undisturbed, resulting in better insulation, lower soil temperature, and permafrost within the control section.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Well drained; runoff is slow to medium; permeability is moderate in the loess mantle, rapid in the sandy substratum, and moderately slow in the clayey substratum.
USE AND VEGETATION: Most areas of Stuck soils have native vegetation of black spruce and white spruce. The successional state of vegetation in a given area is closely related to the fire history. This soil is primarily used for wildlife habitat.
DISTRIBUTION AND EXTENT: Copper River Area, Alaska, 1990.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA
REMARKS: Diagnostic horizons and features recognized in this pedon include: a mollic epipedon epipedon from 0 to 22 inches; epipedon with irregular carbon decrease; cryic temperature regime; sandy particle size class from 10 to 22 inches and clayey from 22 to 40 inches.
The Stuck series is a thawed counterpart of the permafrost Klanelneechena series.
National Cooperative Soil Survey
U.S.A.