LOCATION TATLANIKA               AK

Established Series
Rev. DKM/DLM
02/2022

TATLANIKA SERIES

Depth class: moderately deep
Drainage class: poorly or very poorly drained
Parent material: fine-silty alluvium
Landform: flood plains
Slopes: 0 to 2 percent
Mean annual precipitation: about 11 inches, 280 mm
Mean annual temperature: about 25 degrees F., -4 degrees C.

TAXONOMIC CLASS:

TYPICAL PEDON: Tatlanika silty clay loam - on a slope of 0 percent under stunted black spruce forest at 500 feet elevation. (All colors are for moist soil unless noted)

Oi--0 to 5 inches, (0 to 12 cm); dark brown 7.5YR 3/4; slightly decomposed plant material; many very fine to coarse roots; moderately acid (pH 5.9); clear smooth boundary. (3 to 7 inches thick)

A--5 to 8 inches, (12 to 21 cm); very dark grayish brown 2.5Y 3/2; silty clay loam; moderate medium granular structure; friable, moderately sticky, slightly plastic; many very fine and fine, common medium and few coarse roots; 10 percent grayish brown (2.5Y 5/2); slightly acid (pH 6.2); gradual smooth boundary. (2 to 5 inches thick)

Bjjg--8 to 23 inches, (21 to 58 cm); gray 2.5Y5/2; silt loam; weak medium platy structure; friable, moderately sticky, moderately plastic; common very fine to medium and few coarse roots;10 percent cryoturbation very dark grayish brown (10YR 3/2); 5 percent fine brown (7.5YR 4/4 )redoximorphic concentrations and 10 fine and medium dark gray (N/4) redoximorphic depletions; slightly acid (pH 6.2); gradual smooth boundary. (16 to 32 inches thick)

Cf--23 to 72 inches, (58 to 183 cm); permanently frozen material.

TYPE LOCATION: Greater Nenana Area, Alaska; about 1/2 miles east of Anderson; in the NW 1/4 of the NW 1/4, section 36, T. 6 S., R. 8 W.; Fairbanks (B-5) 1:36,360 quad; Fairbanks Meridian; UTM north 7137996 and UTM east 400768, zone 6.

RANGE IN CHARACTERISTICS:

Particle-size control (section weighted average):
Percent clay in the control section: 20 to 35 percent

Soil moisture regime: aquic
Mean annual soil temperature: 26 degrees F., 50 cm
Thickness of organic materials: 3 to 7 inches, 7 to 18 cm
Texture of the fine silty mantle: silt loam or silty clay loam
Texture of the permafrost substratum: permanently frozen material
Percent clay in the fine silty mantle: 20 to 35 percent
Thickness of cryoturbation and gelic materials: 16 to 32 inches, 43to 82cm
Depth to permafrost: 20 to 39 inches, 50 to 100 cm

O horizon:
Matrix color: hue of 7.5YR or 10YR; value of 2 or 3; chroma of 2 to 4
Texture: slightly or moderately decomposed plant material
Reaction class: very strongly acid to moderately acid

A horizon:
Matrix color: hue of 10YR or 2.5Y; value of 2 to 3; chroma of 1 to 2
Texture: silt loam , silty clay loam or silty clay
cryoturbation and gelic materials: 5 to 25 percent
Reaction class: moderately acid or slightly acid

Bjjg horizon:
Matrix color: hue of 2.5Y to N; value of 3 to 5; chroma of 0 to 2
Redoximorphic concentrations: hue of 7.5YR to 2.5Y; value of 4 or 5; chroma of 4 to 6
Redoximorphic depletions: hue of 2.5Y to N; value of 4 to 6; chroma of 0 to 2
Texture: silt loam or silty clay loam
cryoturbation and gelic materials: 5 to 30 percent
Reaction class: slightly acid to neutral

Cf horizon:
Texture: permanently frozen material

COMPETING SERIES: There are no soils in the same family.

GEOGRAPHIC SETTING:
Parent material: fine-silty alluvium
Landform: flood plain
Slope: 0 to 2 percent
Mean annual temperature: 23 to 28 degrees F., -5 to -2 C.
Mean annual precipitation: 10 to 15 inches, 250 to 380 mm

GEOGRAPHICALLY ASSOCIATED SOILS: These include the Totalanika and Liscum soils. Totatlanika soils are on similar landform and drainage but have a Histic epipedon. Liscum soils are in depressions, are very poorly drained and do not have permafrost.

DRAINAGE AND PERMEABILITY: very poorly or very poorly drained, slow runoff, saturated hydraulic conductivity is slow in the fine silty mantle and impermeable in the permafrost.

USE AND VEGETATION: Used for recreation and wildlife habitat. The native vegetation includes black spruce and ericaceous shrub.

DISTRIBUTION AND EXTENT: MLRA 229, Interior Alaska Lowlands, The series is of moderate extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA

SERIES ESTABLISHED: Greater Nenana Area, Alaska, 2007

REMARKS: Diagnostic features and horizons recognized in this profile include:
Ochric epipedon: 5 to 8 inches, 12 to 21 cm
cryoturbation and gelic materials: from 8 to 72 inches, 12 to 183 cm.
Low chroma matrix: from 8 to 72 inches, 12 to 183 cm.
redoximorphic concentrations: from 8 to 72 inches, 21 to 183 cm.
redoximorphic depletions: from 8 to 72 inches, 21 to 183 cm.
Depth to permafrost: 23 inches, 58 cm
Temperature regime: Cryic 26 F., -3 C.
Moisture regime: aquic

ADDITIONAL DATA:

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National Cooperative Soil Survey
U.S.A.