Wetland Classification and Mapping of Seward, Alaska
Mike Gracz
Doug Van Patten
Soil Subgroup Descriptions
FLUVAQUENTIC CRYOFIBRISTS, by Douglas J Van Patten
SIMILAR SOILS: Fluvaquentic Cryohemists[1],
Fluvaquentic Cryosaprists[2]
Depth class: very deep
Drainage class: very poorly drained
Parent material: peat with thin mineral strata
Landform: fens, floodplains, depressions on till plains
Slopes: range 0 to 1 percent
Mean annual precipitation: 68 inches
Mean annual temperature: 40 degrees F
TAXONOMIC CLASS: Fluvaquentic Cryofibrists
TYPICAL PEDON: Fluvaquentic Cryofibrists - on a 1 percent slope under alder/willow and sedge/bluejoint at 230 feet elevation. (All colors are for moist soil)
Oi1--0 to 2 inches; dark reddish brown (10YR 3/2) peat, contains 75% or more fibers after rubbing; many very fine, fine, and medium roots; abrupt smooth boundary
Cg1--
Oi2--4 to 7 inches; dark reddish brown (7.5YR 3/4) peat, contains 75% or more fibers after rubbing; many very fine, fine, and medium roots; abrupt smooth boundary
Cg2--
Oi3--10 to 12 inches; dark reddish brown (7.5YR 3/4) peat, contains 75% or more fibers after rubbing; abrupt smooth boundary
Cg3--12 to 14 inches; very dark greenish gray (10Y 3/1) silt loam; massive; friable, nonsticky and nonplastic; common very fine, fine, and medium roots; abrupt smooth boundary
Oi4--14 to 18 inches; dark reddish brown (7.5YR 4/4) peat, contains 75% or more fibers after rubbing; abrupt smooth boundary
Cg4--18 to 48 inches; very dark greenish gray (10Y 3/1) stratified silt loam and peat; massive; friable, nonsticky and nonplastic; few very fine, fine, and medium roots
LOCATION: (PEDON 243) About 2
¾ miles NE of
REMARKS: Diagnostic features and horizons in this profile include:
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Aquic moisture regime
-
Fibric material from 0 to 48+ inches with thin layers of mineral soil
