LOCATION TANGERRA                AK

Tentative Series
Rev. DLM
02/2022

TANGERRA SERIES

Depth class: very deep
Drainage class: poorly drained
Parent material: ash influenced loess over sandy and gravelly glaciofluvial deposits
Landform: depressions on moraines and outwash plains
Slopes: 0 to 6 percent
Mean annual precipitation: about 25 inches
Mean annual temperature: about 34 degrees F.

TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, superactive Typic Cryaquods

TYPICAL PEDON: Tangerra silt loam - on a slope of 3 percent under * vegetation at 38 feet elevation. (All colors are for moist soil unless noted)

Oe--0 to 4 inches; dark brown (7.5YR 3/2); moderately decomposed plant material; very fine, fine, and medium roots, few coarse roots; very strongly acid (pH 4.5); abrupt smooth boundary. (0 to 6 inches thick)

E--4 to 5 inches; grayish brown (10YR 4/2); silt loam; weak fine granular structure; very friable, nonsticky and nonplastic; common very fine, fine, and medium roots, few coarse roots; extremely acid (pH 4.2); clear smooth boundary. (1 to 2 inches thick)

Bs--5 to 8 inches; brown (7.5YR 4/4); silt loam; weak fine granular structure; friable, nonsticky and nonplastic; common very fine, fine and medium roots, few coarse roots; 10 percent fine distinct dark grayish brown (10YR 4/2) redoximorphic depletions; very strongly acid (pH 4.5); clear smooth boundary. (3 to 5 inches thick)

Bw--8 to 16 inches; brown (10YR 4/3); sandy loam; weak fine granular structure structure; very friable, nonsticky and nonplastic; common very fine and fine roots, few medium roots; 30 percent coarse distinct dark yellowish brown (10YR 4/6) redoximorphic concentrations; 15 percent coarse faint dark grayish brown (2.5Y 4/2) redoximorphic depletions; strongly acid (pH 5.2); gradual wavy boundary. (0 to 18 inches thick)

2Cg1--16 to 46 inches; olive brown (2.5Y 4/3); loamy sand; single grained; loose, nonsticky and nonplastic; few fine roots; 30 percent very coarse prominent dark yellowish brown (10YR 4/6) redoximorphic concentrations; 20 percent coarse distinct gray (5Y 5/1) redoximorphic depletions; neutral (pH 6.8); gradual wavy boundary. (20 to 40 inches thick)

3Cg2--46 to 60 inches; olive gray (5Y 5/2); very gravelly loamy sand; massive; firm, nonsticky and nonplastic; 30 percent very coarse prominent dark yellowish brown (10YR 4/6 redoximorphic concentrations; 20 percent coarse faint gray (5Y 5/1) redoximorphic depletions; 40 percent gravl; neutral (pH 6.8). (10 to 24 inches thick)

TYPE LOCATION: Western Kenai Area, Alaska; about 1 mile northeast of Captain Cook State Recreational Area; in the SW 1/4 of the SE 1/4, section 10, T. 8 N., R. 10 W.; Kenai (D-3) SW 1:25,00 quad; Seward Meridian; UTM north 6741304 and UTM east 608029, zone 5.

RANGE IN CHARACTERISTICS:

Mean annual soil temperature: * degrees F
Ash influence loess: 14 to 30 inches thick

O horizon:
Reaction class: extremely acid or very strongly acid

E horizon:
Texture: silt loam, very fine sandy loam
Reaction class: extremely acid to strongly acid

Bs horizon:
Matrix color: value of 3 or 4; chroma of 2 to 4
Texture: silt loam, very fine sandy loam
Reaction class: extremely acid to strongly acid

Bw horizon:
Matrix color: hue of 10YR or 2.5Y; value of 3 to 5; chroma of 1 to 3
Redoximorphic features: hue of 7.5YR to 2.5Y; value of 3 or 4; chroma of 2 to 6
Texture: sandy loam, silt loam, loam
Reaction class: extremely acid to strongly acid

2Cg horizon:
Matrix color: hue of 10YR to 5Y; value of 3 to 5; chroma of 1 to 4
Redoximorphic features: hue of 10YR to 5Y; value of 4 or 5; chroma of 1 to 6
Texture: loamy sand, sand modified by 0 to 20 percent total coarse fragments; 0 to 20 percent gravel, 0 to 5 percent cobbles
Reaction class: moderately acid to neutral

3Cg horizon:
Matrix color: hue of 10YR to 5Y; value of 3 to 5; chroma of 1 to 3
Redoximorphic features: hue of 10YR to 5Y; value of 4 or 5; chroma of 1 to 6
Texture: loamy sand, sand modified by 35 to 55percent total coarse fragments; 35 to 50 percent gravel, 0 to 5 percent cobbles
Reaction class: moderately acid to neutral

COMPETING SERIES: There are the no competing series in this classification.

GEOGRAPHIC SETTING:
Parent material: ash influenced loess over sandy and gravelly glaciofluvial deposits
Landform: depressions on moraines and outwash plains
Slope: 0 to 6 percent
Mean annual temperature: about 34 degrees F.
Mean annual precipitation: about 25 inches

GEOGRAPHICALLY ASSOCIATED SOILS: These include Soldotna and Qutal soils. Soldotna soils are well drained and are on terraces. Qutal soils are somewhat poorly drained and are on till plains.

DRAINAGE AND PERMEABILITY: Poorly drained, very high runoff, saturated hydraulic conductivity is moderately high or high in the solum and very high in the substratum.

USE AND VEGETATION: Used for wildlife habitat. The native vegetation is *.

DISTRIBUTION AND EXTENT: MLRA 224 Cook Inlet Lowlands, South-central Alaska, The series is of moderate extent.

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

SERIES PROPOSED: Area, Alaska, 2004

REMARKS: Diagnostic features and horizons recognized in this profile include:
Spodic horizon: from 5 to 8 inches.
Coarse-loamy particle size control section: from 10 to 16 inches
Sandy or sandy-skeletal particle size control section from 16 to 40 inches
Temperature regime: cryic
Moisture regime: aquic

ADDITIONAL DATA:

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National Cooperative Soil Survey
U.S.A.