LOCATION SUMMERCAMP AK
Established Series
SAS/MPS
02/2022
SUMMERCAMP SERIES
Landscape--hills
Landform--hillslopes
Microfeature--mound
Slope--0 to 15 percent
Parent material--mossy organic material over colluvium
Mean annual precipitation--about 330 mm
Mean annual air temperature--about -3 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--aquic
Soil temperature regime--gelic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, acid, subgelic Histic Gelaquepts
TYPICAL PEDON: Summercamp peat on an east northeast facing linear, convex backslope of a hill on a slope of 10 percent at an elevation of 150 m (The soil was wet, non-satiated, from 0 to 110 cm when described on August 22, 2019.)
Oi--0 to 23 cm; peat, brown (7.5YR 4/3) dry, very dark brown (7.5YR 2.5/3) moist; many very fine and fine roots and common medium roots; extremely acid (pH 4.1); abrupt smooth boundary
Oa--23 to 37 cm; muck, brown (7.5YR 4/2) dry, very dark brown (7.5YR 2.5/2) moist; many very fine and fine roots and common medium roots; extremely acid (pH 4.3); clear smooth boundary
Ajj--37 to 40 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; nonsmeary; many very fine and fine roots; few fine and very fine irregular pores 3 percent subangular gravel; extremely acid (pH 4.4); abrupt irregular boundary
Cg--40 to 59 cm; gravelly loam, light gray (2.5Y 7/2) dry, grayish brown (2.5Y 5/2) and dark grayish brown (10YR 4/2) oxidized moist; massive; friable, nonsticky, nonplastic; nonsmeary; common very fine roots; common fine tubular pores; 5 percent medium strong brown (7.5YR 4/6) masses of oxidized iron; 15 percent subangular gravel; very strongly acid (pH 4.7); clear smooth boundary
C1--59 to 100 cm; gravelly silt loam, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; massive; friable, nonsticky, nonplastic; weakly smeary; 1 percent fine dark yellowish brown (10YR 4/6) masses of oxidized iron; 30 percent subangular gravel; very strongly acid (pH 4.9); clear smooth boundary
C2--100 to 150 cm; very gravelly loam, pale yellow (2.5Y 7/3) dry, light olive brown (2.5Y 5/3) moist; massive; friable, slightly sticky, nonplastic; nonsmeary; 1 percent fine grayish brown (2.5Y 5/2) iron depletions and 3 percent medium dark yellowish brown (10YR 4/6) masses of oxidized iron; 50 percent subangular gravel; strongly acid (pH 5.1)
TYPE LOCATION: Nome Census Area County, Alaska, latitude 63.9506083 longitude -160.7530446 degrees, datum WGS84 (coordinates determined with a GPS unit)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature-- -2 to 0 degrees C
Soil moisture control section--saturated at a depth of between 0 and 25 cm for more than two weeks during the growing season (aquic moisture regime)
Thickness histic epipedon--20 to 37 cm
Depth to reduced matrix--25 to 45 cm
Depth to aquic conditions--present throughout the profile
Particle Size Control Section:
*Clay--15 to 24 percent
*Total rock fragment content--35 to 55 percent gravel
Oi horizon
Thickness--12 to 28 cm
Oa horizon
Thickness--5 to 15 cm
Ajj horizon
Hue--7.5YR or 10YR
Value--2 to 3 moist, 4 or 5 dry
Chroma--1 to 3
Fine-earth texture--silt, silt loam
Clay--5 to 12 percent
Sand--5 to 40 percent
Organic carbon--5 to 12 percent
Total rock fragment content--0 to 10 percent gravel
Reaction--4.3 to 5.4
Thickness--2 to 15 cm
Cg horizon
Hue--10YR, 2.5Y, or 5GY
Value--4 or 5 moist, 6 or 7 dry
Chroma--1 or 2
Fine-earth texture--silt loam, loam
Clay--15 to 27 percent
Sand--20 to 45 percent
Organic carbon--1 to 3 percent
Total rock fragment content--0 to 15 percent gravel
Reaction--4.4 to 5.5
Thickness--10 to 30 cm
C1 horizon
Hue--10YR or 2.5Y
Value--3 to 5 moist, 5 to 7 dry
Chroma--2 to 4
Fine-earth texture--silt loam, loam
Clay--15 to 26 percent
Sand--25 to 40 percent
Organic carbon--1 to 2 percent
Total rock fragment content--5 to 30 percent gravel
Reaction--4.9 to 5.7
Thickness--20 to 45 cm
C2 horizon
Value--4 or 5 moist, 6 or 7 dry
Chroma--2 or 3
Fine-earth texture--silt loam, loam, sandy loam
Clay--15 to 26 percent
Sand--30 to 60 percent
Organic carbon--.2 to 1 percent
Total rock fragment content--35 to 65 percent gravel
Reaction--5.0 to 6.2
Thickness--30 to 50 cm
COMPETING SERIES: None
GEOGRAPHIC SETTING:
*Elevation--20 to 270 m
*Climate--warm, moist summers; cold, dry winters
*Mean annual precipitation--300 to 420 mm
*Mean annual air temperature-- -5 to -1 degrees C
*Frost-free period--55 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
*
Cranberryslough--permafrost present; similar landscape position
*
Springcamp--umbric epipedon, no aquic conditions present, moderately deep to paralithic contact; similar landscape position
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--poorly drained
*Saturation during normal years--saturated at a depth of between 0 and 25 cm during the month of June, wet, nonsatiated the remainder of the growing season
*Saturated hydraulic conductivity (Ksat)--high in the histic epipedon, high to moderately high throughout the rest of the profile
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--white spruce, black spruce, marsh Labrador tea, dwarf birch, cloudberry, lingonberry, bog blueberry, black crowberry, tussock cottongrass, Bigelow's sedge, greygreen reindeer lichen, reindeer lichen, sphagnum, smallawned sedge, star reindeer lichen
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 62 to 137 cm
*Histic epipedon--zone from 0 to 37 cm
*Aquic conditions--zone from 0 to 150 cm
*Cryoturbation--zone from 37 to 40 cm
*Reduced matrix--zone from 40 to 59 cm
*Redoximorphic iron concentrations--zone from 40 to 150 cm
*Redoximorphic iron depletions with a chroma of 2 or less--zone from 100 to 150 cm
National Cooperative Soil Survey
U.S.A.