LOCATION RUNKELSCREEK            AK

Established Series
SAS/TJR
02/2022

RUNKELSCREEK SERIES

Landscape--plains, foothills
Landform--drainageways
Slope--0 to 2 percent
Parent material--grassy and/or mossy organic material over alluvium
Mean annual precipitation--about 530 mm
Mean annual air temperature--about -3 degrees C
Depth class--very deep
Drainage class--very poorly drained
Soil moisture regime--peraquic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy, mixed, euic Terric Cryohemists

TYPICAL PEDON: Runkelscreek mucky peat on a linear, concave drainageway on a plain, on a slope of 1 percent at an elevation of 24 m (The soil was moist throughout when described on June 20, 2016.)

Oe1--0 to 20 cm; mucky peat, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; many very fine roots and common medium roots and common fine roots; moderately acid (pH 5.8); gradual smooth boundary

Oe2--20 to 60 cm; mucky peat, gray (2.5Y 5/1) dry, very dark gray (2.5Y 3/1) moist; many very fine roots and common fine roots; moderately acid (pH 5.8); clear smooth boundary

Cg--60 to 150 cm; silt loam, gray (2.5Y 5/1) dry, very dark gray (2.5Y 3/1) moist; massive; friable, nonsticky, slightly plastic; slightly acid (pH 6.2)

TYPE LOCATION: Nome Census Area County, Alaska, latitude 63.8371870 degrees, longitude - 160.6226800 degrees, datum WGS84 (Coordinates determined with a GPS unit)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 3 degrees C
Soil moisture control section--saturated in all parts during the growing season (peraquic moisture regime)
Aquic conditions--throughout the profile
Thickness of hemic soil materials--40 to 75 cm
Depth to reduced matrix--40 to 75 cm

Particle Size Control Section:
*Clay--5 to 18 percent
*Total rock fragment content--0 to 10 percent

Oe horizons
Hue--7.5YR, 10YR, or 2.5Y
Value--2 to 4 moist, 4 to 6 dry
Chroma--1 to 4
Reaction--5.1 to 6.0
Organic carbon content--35 to 55 percent
Rubbed fiber content--17 to 40 percent

*Combined thickness--40 to 75 cm

Cg horizon
*Hue--2.5Y, 5Y, or N
*Value--2.5 to 4 moist, 4 to 6 dry
*Chroma--0 to 2
*Fine-earth texture--silt loam, loam, very fine sandy loam
*Clay--5 to 18 percent
*Sand--10 to 70 percent
*Organic carbon--0.3 to 1 percent
*Gravel content--0 to 10 percent
*Reaction--5.6 to 6.6

COMPETING SERIES:
* Doroshin-coarse fragment content ranges to 25 percent, pH ranges from 5.1 to 6.0 in mineral soil horizon
* Hewitt-textures range to clay loam
* Stanbro-soils formed in glaciofluvial deposits, clay ranges to 35 percent
* Tepete-clay ranges to 35 percent

GEOGRAPHIC SETTING:
*Elevation--5 to 550 m
*Climate--warm, moist summers; cold, dry winters
*Mean annual precipitation--400 to 650 mm
*Mean annual air temperature-- -5 to -1 degrees C
*Frost-free period--55 to 90 days

GEOGRAPHICALLY ASSOCIATED SOILS:
* Sikinik--depth to aquic conditions 0 to 25 cm, plain talfs
* Penguquq--depth to aquic conditions below 25 cm, mounds on hillslopes

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--very poorly drained
*Saturation during normal years--saturated throughout the profile during the growing season
*Ponding--frequent, long
*Saturated hydraulic conductivity (Ksat)--moderately high or high in the organic soil horizons, moderately high in the mineral soil horizons

USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--carex aquatilis, eriophorum angustifolium, salix fuscescens, comarum palustre, eriophorum vaginatum, sphagnum moss

DISTRIBUTION AND EXTENT: Nulato Hills-Southern Seward Peninsula Highlands, Alaska; MLRA 240; large extent

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

SERIES ESTABLISHED: Nulato Hills BLM area, Nome Census Area, Alaska; 2021

REMARKS:
Diagnostic horizons and features recognized in this pedon
*Particle-size control section--zone from 60 to 130 cm
*Surface tier--zone from 0 to 30 cm
*Subsurface tier--zone from 30 to 90 cm
*Bottom tier--zone from 90 to 130 cm
*Thickness of organic layers--60 cm
*Aquic conditions--present throughout the profile

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National Cooperative Soil Survey
U.S.A.