LOCATION SPRINGCAMP AK
Established Series
SAS/MPS
02/2022
SPRINGCAMP SERIES
Landscape--hills
Landform--hillslopes
Slope--10 to 22 percent
Parent material--loamy colluvium over gravelly colluvium over residuum
Mean annual precipitation--about 310 mm
Mean annual air temperature--about -3 degrees C
Depth class--moderately deep to paralithic bedrock
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Typic Humicryepts
TYPICAL PEDON: Springcamp silt loam on a west northwest facing linear, concave backslope, on a slope of 28 percent at an elevation of 113 m (The soil was moist from 0 to 35 cm and 41 to 150 cm, and wet, non-satiated, from 35 to 41 cm when described on July 19, 2016.)
Oe--0 to 3 cm; moderately decomposed plant material, dark gray (7.5YR 4/1) dry, black (7.5YR 2.5/1) moist; nonsticky, nonplastic; many very fine and common fine and medium roots; very strongly acid (pH 4.8); clear smooth boundary
A1--3 to 10 cm; silt loam, dark gray (7.5YR 4/1) dry, black (7.5YR 2.5/1) moist; weak fine granular structure; very friable, nonsticky, nonplastic; many very fine and common fine and medium roots; strongly acid (pH 5.3); clear smooth boundary
A2--10 to 22 cm; silt loam, brown (7.5YR 4/2) dry, very dark brown (7.5YR 2.5/2) moist; weak medium subangular blocky structure; friable, nonsticky, nonplastic; many very fine and common fine roots; common very fine and few fine irregular pores; 1 percent gravel; moderately acid (pH 5.8); clear irregular boundary
2Bw--22 to 41 cm; very gravelly loam, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; weak medium granular structure; friable, nonsticky, nonplastic; common very fine roots; few fine irregular pores; 40 percent gravel; moderately acid (pH 5.9); clear smooth boundary
2C--41 to 75 cm; extremely gravelly loam, light brownish gray (2.5Y 6/2) dry, dark grayish brown (2.5Y 4/2) moist; massive; friable, slightly sticky, nonplastic; 60 percent gravel; moderately acid (pH 5.9); clear irregular boundary
3Cr--75 to 150 cm;
TYPE LOCATION: Nome Census Area, Alaska, latitude 63.6120850, longitude -160.8824000 degrees, datum WGS84 (coordinates determined with a GPS unit)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--0 to 3 degrees C
Soil moisture control section--dry less than 45 consecutive days in June through October (udic soil moisture regime)
Umbric epipedon--22 to 40 cm
Depth to paralithic contact--50 to 75 cm
Particle Size Control Section:
*Clay--10 to 20 percent
*Total fragments--40 to 80 percent angular and subangular gravels and channers
Oe horizon
Thickness--2 to 12 cm
A1 horizon
Hue--5YR, 7.5YR or 10YR
Value--2 to 3 moist, 4 or 5 dry
Chroma--1 or 2
Fine-earth texture--silt, silt loam
Clay--4 to 10 percent
Sand--5 to 30 percent
Organic carbon--15 to 18 percent
Reaction--4.2 to 5.3
Thickness--5 to 10 cm
A2 horizon
Hue--5YR, 7.5YR or 10YR
Value--2 to 3 moist, 4 or 5 dry
Chroma--2 to 3
Fine-earth texture--silt, silt loam
Clay--5 to 10 percent
Sand--5 to 30 percent
Organic carbon--5 to 12 percent
Total rock fragment content--1 to 20 percent
Total channer content--0 to 20 percent
Total gravel content--0 to 5 percent
Reaction--4.8 to 5.8
Thickness--8 to 20 cm
2Bw horizon
7.5YR or 10YR
Value--3 or 4 moist, 5 or 6 dry
Chroma--2 or 3
Fine-earth texture--silt loam, loam
Clay--8 to 17 percent
Sand--20 to 45 percent
Organic carbon--1 to 2 percent
Total rock fragment content--5 to 45 percent
Total channer content--0 to 40 percent
Total gravel content--5 to 40 percent
Reaction--4.3 to 5.9
Thickness--15 to 25 cm
2C horizon
Hue--10YR or 2.5Y
Chroma--2 to 4
Fine-earth texture--silt loam, sandy loam, loam
Clay--10 to 20 percent
Sand--30 to 65 percent
Organic carbon--1 to 2 percent
Total rock fragment content--45 to 80 percent
Total channer content--0 to 50 percent
Total gravel content--0 to 65 percent
Reaction--5.0 to 6.2
Thickness--15 to 35 cm
3Cr horizon
COMPETING SERIES:
*
Atayak--deep to lithic contact, no channers present; escarpments on plains
*
Tolstoipoint--very deep; mountain slopes
GEOGRAPHIC SETTING:
*Elevation--25 to 200 m
*Climate--warm, moist summers; cold, dry winters
*Mean annual precipitation--300 to 365 mm
*Mean annual air temperature-- -5 to -1 degrees C
*Frost-free period--55 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
*
Cranberryslough--permafrost present, histic epipedon, aquic soil moisture regime, gelic soil temperature regime, saddles on hills
*
Nikaat--permafrost present, histic epipedon, aquic soil moisture regime, gelic soil temperature regime, loess covered terraces and plains
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--well drained
*Saturation during normal years--none
*Saturated hydraulic conductivity (Ksat)--high to moderately high throughout the profile
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--green alder, bluejoint, spreading woodfern, stiff clubmoss, arctic raspberry, tealeaf willow, beaverd spirea, Moss, arctic starflower, white spruce, resin birch, reedgrass, field horsetail, siberian alder, prickly rose, common ladyfern, red currant, splendid feather moss, Kenai birch, fireweed, dwarf raspberry
DISTRIBUTION AND EXTENT: Nulato Hills-Southern Seward Peninsula Highlands, Alaska; MLRA 240; small 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 28 to 75 cm
*Umbric epipedon--zone from 3 to 41 cm
*Lithological discontinuity--zone from 22 to 75 cm
*Lithological discontinuity--zone from 75 to 150 cm
*Depth to paralithic contact--75 cm
National Cooperative Soil Survey
U.S.A.