LOCATION SKARLAND                AK

Established Series
Rev. MHC/DLM
02/2022

SKARLAND SERIES

Depth class: very deep
Drainage class: somewhat excessively drained
Landforms: flood plains on alluvial fans
Parent material: loamy alluvium over sandy and gravelly alluvium
Elevation: 2,779 to 3,507 feet (847 to 1,069 m)
Slope: 8 to 20 percent
Annual precipitation: 25 to 28 inches (623 to 715 mm)
Annual temperature: 25 degrees F (-4 degrees C)
Frost-free period: 50 to 70 days

TAXONOMIC CLASS: Sandy-skeletal, mixed, subgelic Typic Gelorthents

TYPICAL PEDON: Skarland stratified sand to silt - on a slope of 12 percent under feltleaf willow-mixed shrub/herbaceous scrub. (All colors are for moist soil)

Oi--0 to 2 inches (0 to 5 cm); dark reddish brown (5YR 2.5/2) slightly decomposed plant material; many very fine and fine roots, common medium and coarse roots; very strongly acid (pH 5.0); abrupt smooth boundary.

A/Oe--2 to 5 inches (5 to 13 cm); 75 percent dark brown (10YR 3/3) stratified sand to silt and 25 percent very dark brown (10YR 2/2) moderately decomposed plant material; weak fine subangular blocky structure; very friable, nonsticky and nonplastic; common very fine and fine roots, few medium and few roots; 2 percent gravel; strongly acid (pH 5.4); clear smooth boundary.

2CA--5 to 22 inches (13 to 56 cm); dark yellowish brown (10YR 3/4) very gravelly loamy sand; single grain; friable, nonsticky and nonplastic; few very fine and fine roots; 25 percent gravel, 10 percent cobbles; moderately acid (pH 5.8); clear smooth boundary.

2C--22 to 60 inches (56 to 152 cm); dark yellowish brown (10YR 3/4) extremely cobbly coarse sand; single grain; loose, nonsticky and nonplastic; 35 percent gravel, 25 percent cobbles; moderately acid (pH 6.0).

TYPE LOCATION: Delta River Area, Alaska; in the Tangle Lakes area about 0.75 miles west of Long Tangle Lake; UTM coordinates: Zone 6, Easting 550992, Northing 6998458.

RANGE IN CHARACTERISTICS:

Soil moisture class: udic
Average annual soil temperature: 32 to 30 degrees F (-0.1 to -1.0 degrees C)
Mean summer soil temperature: 36 to 39 degrees F. (2 to 4 degrees C)
Depth to strongly contrasting textural stratification: 2 to 7 inches (5 to 18 cm)

Oi and Oe part of A/Oe horizon:
Colorhue of 5YR to 10YR; value of 2 or 3; chroma of 2 or 3
Texture-slightly decomposed plant material, moderately decomposed plant material
Organic matter content65 to 90 percent
Reactionvery strongly acid to slightly acid

A part of A/Oe horizon:
Colorhue of 10YR or 2.5Y; chroma of 2 or 3
Clay content0 to 10 percent
Silt content15 to 35 percent
Sand content60 to 80 percent
Organic matter content0 to 2 percent
Rock fragments0 to 5 percent rounded strongly cemented gravel
Reactionstrongly acid to slightly alkaline

2CA or 2C horizon:
Colorhue of variegated, 10YR or 2.5Y; chroma of 2 to 4
Texturevery gravelly loamy sand; extremely cobbly coarse sand; extremely gravelly coarse sand
Clay content0 to 5 percent
Silt content0 to 15 percent
Sand content80 to 95 percent
Organic matter content0 to 1 percent
Rock fragments15 to 60 percent rounded strongly cemented gravel; 0 to 30 percent rounded strongly cemented cobbles
Reactionmoderately acid to slightly alkaline

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

GEOGRAPHIC SETTING:
Landforms: flood plains on alluvial fans
Parent material: loamy alluvium over sandy and gravelly alluvium
Elevation: 2,779 to 3,507 feet (847 to 1,069 m)
Slope: 8 to 20 percent
Annual precipitation: 25 to 28 inches (623 to 715 mm)
Annual temperature: 25 degrees F (-4 degrees C)
Frost-free period: 50 to 70 days

GEOGRAPHICALLY ASSOCIATED SOILS: These include Nizina and Schleyer soils. Nizina soils are somewhat excessively drained, very deep, and occur on floodplains and alluvial fans. Schleyer soils are somewhat excessively drained, very deep, and occur on hills, mountains, outwash plains, and terraces.

DRAINAGE AND PERMEABILITY: Somewhat excessively drained, medium runoff. Saturated hydraulic conductivity is moderately high to high in the loamy alluvium and high to very high in the sandy and gravelly alluvium.

USE AND VEGETATION: Used for wildlife habitat and recreation. Native vegetation is feltleaf willow-mixed shrub/herbaceous scrub.

DISTRIBUTION AND EXTENT: MLRA 228, Interior Alaska Mountains, Alaska. The series is of small extent.

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

SERIES ESTABLISHED: Delta River Area, Alaska, 2005

REMARKS: Diagnostic features and horizons recognized in this profile include:
No diagnostic horizon:
Lithologic discontinuity: At the upper boundary of 2AC horizon
Sandy-skeletal particle size control section: 10 to 40 inches below the mineral soil surface
Temperature regime: gelic
Temperature class: subgelic

ADDITIONAL DATA:

---

National Cooperative Soil Survey
U.S.A.