LOCATION PENGUQUQ AK
Established Series
SAS/TJR
02/2022
PENGUQUQ SERIES
Landscape--plains
Landform--mounds in drainageways or depressions
Slope--2 to 20 percent
Parent material--mossy organic material over cryoturbated and/or loess
Mean annual precipitation--about 530 mm
Mean annual air temperature--about -3 degrees C
Depth class--very deep (very shallow to permafrost)
Drainage class--moderately well drained
Soil moisture regime--udic
Soil temperature regime--gelic
Soil moisture subclass--typic
TAXONOMIC CLASS: Euic, subgelic Typic Folistels
TYPICAL PEDON: Penguquq slightly decomposed plant material on a convex, convex mound in a drainageway on a plain, on a slope of 2 percent at an elevation of 374 m (The soil was moist to 28 cm and wet, satiated throughout the rest of the profile when described on June 14, 2017.)
Oi--0 to 16 cm; slightly decomposed plant material, reddish yellow (7.5YR 6/6) dry, strong brown (7.5YR 4/6) moist; many very fine roots and common medium roots and common fine roots and common coarse roots; extremely acid (pH 3.8); abrupt smooth boundary
Oe--16 to 32 cm; moderately decomposed plant material, very dark gray (10YR 3/1) dry, black (10YR 2/1) moist; many very fine roots and common medium roots and common fine roots; very strongly acid (pH 4.5); clear irregular boundary, 6 percent mottled ice lenses
Oe/Ajj--32 to 58 cm; moderately decomposed plant material, 64 percent yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist and 30 percent dark gray (10YR 4/1) dry, black (10YR 2/1) moist, and 6 percent brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; weak fine subangular blocky structure; firm, nonsticky, nonplastic; common very fine roots; strongly acid (pH 5.3); clear smooth boundary, 6 percent mottled ice lenses present and 15 percent lenticular ice lenses present
Oe/Ajjf--58 to 65 cm; permanently frozen silt loam, permanently frozen mucky peat, 88 percent very dark gray (10YR 3/1) and 12 percent dark brown (10YR 3/3) moist; moderate thin platy structure; very firm, nonsticky, nonplastic; strongly acid (pH 5.4); clear wavy boundary, 15 percent lenticular ice lenses present
Af--65 to 150 cm; permanently frozen silt loam, 12 percent dark brown (10YR 3/3) moist; moderate medium platy structure; firm, nonsticky, nonplastic; moderately acid (pH 5.7), 85 percent lenticular ice lenses present
TYPE LOCATION: Nome Census Area County, Alaska, latitude 63.2821330 degrees, longitude - 161.6395886 degrees, datum WGS84 (Coordinates determined with a GPS unit)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature-- -1 to 0 degrees C
Soil moisture control section--dry less than 45 consecutive days in June through October (udic moisture regime)
Thickness of folistic epipedon--40 to 75 cm
Depth to aquic conditions--50 to 100 cm
Particle Size Control Section:
*Clay--5 to 18 percent
Oi horizon
Value--4 to 6 moist, 6 to 8 dry
Chroma--3 to 8
Reaction--3.8 to 4.9
Organic carbon content --35 to 55 percent
Rubbed fiber content--40 to 100 percent
Sodium pyrophosphate color value and chroma where rubbed fiber content is 40 to 75 percent--7/1, 7/2, 8/1, 8/2, 8/3
Thickness--5 to 25 cm
Oe horizon
Hue--5YR or 10YR
Value--2 to 4 moist, 4 to 6 dry
Chroma--1 to 3
Reaction--4.2 to 5.1
Organic carbon content--35 to 55 percent
Rubbed fiber content--17 to 40 percent
Thickness--5 to 40 cm
Oe/Ajj horizon
Hue--7.5YR or 10YR
Value--2 to 3 moist, 4 to 5 dry
Chroma--1 to 4
Reaction--5.0 to 5.5
Organic carbon content--35 to 55 percent
Rubbed fiber content--17 to 40 percent
Thickness--5 to 40 cm
Oe/Ajjf horizon
Hue--7.5YR or 10YR
Value--2 to 3 moist, 4 to 5 dry
Chroma--1 to 3
Reaction--4.7 to 5.4
Organic carbon content--35 to 55 percent
Rubbed fiber content--17 to 40 percent
Thickness--5 to 30 cm
Af horizon
Hue--7.5YR or 10YR
Value--2 to 3 moist, 4 to 5 dry
Chroma--1 to 3
Fine-earth texture--silt loam, loam, very fine sandy loam
Clay--5 to 18 percent
Sand--20 to 70 percent
Organic carbon--1 to 4 percent
Reaction--5.0 to 6.1
COMPETING SERIES:
*
Peluk-15 to 18 inches (shallow) to permafrost, coarse fragments range to 30 percent, on peat plateaus
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
*
Runkelscreek--depth to aquic conditions at the soil surface, no permafrost, drainageways
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--moderately well drained
*Saturation during normal years--saturated from a depth of 50 to 100 cm during the growing season
*Saturated hydraulic conductivity (Ksat)--very high in the upper part of the profile, moderately high or high in the unfrozen saturated organic soil horizons, very low in the permafrost soil layers
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--dwarf birch, sphagnum moss, marsh Labrador tea, black crowberry, Bigelow's sedge, reindeer lichen, bog blueberry, cup lichen, bog rosemary, water sedge, island cetraria lichen, tussock cottongrass
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
*Control section--zone from 0 to 83 cm
*Surface tier--zone from 0 to 30 cm
*Subsurface tier--zone from 30 to 83 cm
*Fibric soil materials--zone from 0 to 16 cm
*Hemic soil materials--zone from 16 to 65 cm
*Cryoturbation--zone from 32 to 65 cm
*Depth to permafrost--at 58 cm
*Thickness of organic layers--40 to 100 cm
*Aquic conditions--zone from 58 to 150 cm
________________________________________
National Cooperative Soil Survey
U.S.A.