LOCATION TAGLUK AK
Established Series
SWD/CBB
11/2024
TAGLUK SERIES
Depth class: very deep
Drainage class: well drained
Parent material: gravelly loamy colluvium derived from sandstone
Landscape: mountains, hills
Landform: mountain slopes, hillslopes
Slopes: 10 to 35 percent
Mean annual precipitation: about 450 mm (18 in)
Mean annual air temperature: about -4 degrees C. (25 degrees F.)
Frost-free period: 70 to 90 days
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Pachic Haplocryolls
TYPICAL PEDON: Tagluk gravelly silt loam in an open boreal forest on a south facing linear, convex backslope on a slope of 25 percent at an elevation of 217 m (715 ft)
Oi--0 to 12 cm (0 to 5 in); slightly decomposed plant material, very dark brown (10YR 2/2) broken face moist, dark grayish brown (10YR 4/2) broken face dry; many very fine and fine roots throughout; very fine and fine tubular pores; moderately acid (pH 5.6); abrupt smooth boundary. (10 to 16 cm, 4 to 6 in thick)
Oe--12 to 15 cm (5 to 6 in); moderately decomposed plant material, black (10YR 2/1) broken face moist, dark gray (10YR 4/1) broken face dry; many very fine and fine roots throughout; strongly acid (pH 5.3); abrupt wavy boundary. (2 to 6 cm, 1 to 2 in thick)
Bw1--15 to 51 cm (6 to 20 in); gravelly silt loam, very dark grayish brown (10YR 3/2) broken face moist, grayish brown (10YR 5/2) broken face dry; weak medium subangular blocky structure; friable, slightly hard, nonsticky, nonplastic; nonfluid; many fine and few medium roots throughout; fine dendritic tubular pores; 20 percent gravel; slightly acid (pH 6.4); clear smooth boundary. (15 to 40 cm, 6 to 16 in thick)
Bw2--51 to 67 cm (20 to 26 in); gravelly silt loam, very dark gray (10YR 3/1) broken face moist, gray (10YR 5/1) broken face dry; weak medium subangular blocky structure; friable, slightly hard, nonsticky, nonplastic; nonfluid; fine irregular pores; 20 percent gravel and 10 percent cobbles; neutral (pH 6.6); clear smooth boundary. (12 to 35 cm, 5 to 14 in thick)
C--67 to 200 cm (26 to 79 in); very gravelly silt loam, very dark gray (10YR 3/1) broken face moist, gray (10YR 5/1) broken face dry; massive; very friable, soft, nonsticky, nonplastic; nonfluid; fine irregular pores; 35 percent gravel and 20 percent cobbles; slightly acid (pH 6.4). (107 to 161 cm, 42 to 63 in thick)
TYPE LOCATION: Nulato Hills - Continental Divide and Blackburn Hills Soil Survey Area, Alaska; latitude 64 degrees 7 minutes 6.06 seconds north, longitude 160 degrees 15 minutes 48.32 seconds west, datum WGS84, UTM north 7110812.74 and UTM east 438467.84, zone 4W, datum WGS84.
RANGE IN CHARACTERISTICS:
Soil moisture regime: udic
Soil temperature regime: cryic
Mean annual soil temperature: 0 to 3 degrees C. (32 to 37 degrees F.)
Thickness of organic material: 12 to 20 cm (5 to 8 in)
Thickness of folistic epipedon: 15 to 20 cm (6 to 8 in)
Thickness of mollic epipedon: 27 to 75 cm (11 to 30 in)
Oi and Oe horizons:
Hue: 10YR, 7.5YR, or 5YR
Value: 2 to 6 moist, 4 to 8 dry
Chroma: 1 to 4
Texture: slightly or moderately decomposed plant material
Organic matter: 60 to 90 percent
Reaction class: extremely acid to moderately acid (pH 3.5 to 6.0)
Bw horizons:
Hue: 10YR or 2.5Y
Value: 3 to 5 moist, 5 to 7 dry
Chroma: 1 to 3
Texture: silt loam, loam, or their gravelly analogues
Sand: 10 to 50 percent
Silt: 34 to 80 percent
Clay: 2 to 16 percent
Rock fragments: 0 to 59 percent
Gravels: 0 to 50 percent
Cobbles: 0 to 15 percent
Organic matter: 2 to 8 percent
Reaction class: moderately acid to neutral (pH 5.6 to 7.3)
C horizon:
Hue: 10YR or 2.5Y
Value: 3 to 5 moist, 5 to 7 dry
Chroma: 1 to 3
Texture: silt loam, loam, fine sandy loam, or their gravelly analogues
Sand: 10 to 70 percent
Silt: 18 to 80 percent
Clay: 4 to 12 percent
Rock fragments: 35 to 59 percent
Gravels: 30 to 55 percent
Cobbles: 0 to 25 percent
Organic matter: 0.5 to 3 percent
Reaction class: moderately acid to slightly acid (pH 5.6 to 6.5)
Some pedons have sapric soil materials at depths between 7 to 25 cm (3 to 10 in) and/or do not have thick enough organic material to meet a folistic epipedon.
COMPETING SERIES: These are the
Baconcamp (OR),
Badgerton,
Hobacker,
Mundos,
Sweethollow (ID & WY),
Badhap,
Belsac,
Croesus,
Goodski,
Snacreek,
Snopoc (NV),
Behanco,
Dressel,
Gateview,
Namela,
Papaspila (CO),
Behanin (UT & CO),
Boatman,
Marcetta (MT),
Boydhollow,
Busterback,
Juliet,
Kious,
Lionhead,
Lund,
Nazaton,
Sparky,
Splitbutte (ID),
Bullrey (ID & MT),
Hapgood (NV, CA, CO, ID, MT, & OR),
Harcany (NV & OR),
Lolon (MT & WY),
Nagitsy (ID & UT),
Parkcity,
Poleline,
Tonigut (UT),
Povey (ID & CO), and
Iyyagrik (AK) soils.
Baconcamp,
Badgerton,
Badhap,
Behanco,
Behanin,
Belsac,
Boatman,
Boydhollow,
Bullrey,
Croesus,
Dressel,
Gateview,
Goodski,
Hapgood,
Harcany,
Hobacker,
Juliet,
Kious,
Lionhead,
Lolon,
Lund,
Marcetta,
Mundos,
Nagitsy,
Namela,
Nazaton,
Papaspila,
Parkcity,
Poleline,
Povey,
Snacreek,
Snopoc,
Sparky,
Splitbutte,
Sweethollow, and
Tonigut soils have an average annual soil temperature greater than 3 degrees C. (37 degrees F.)
Busterback soils occur at elevations of 1900 to 2200 m (6,300 to 7,300 ft).
Iyyagrik soils have lithic contact at depths between 74 to 191 cm (29 to 75 in).
GEOGRAPHIC SETTING:
Elevation: 130 to 580 meters (425 to 1900 feet)
Parent material: gravelly loamy colluvium derived from sandstone
Landform: mountain slopes, hillslopes
Slopes: 10 to 35 percent
Mean annual precipitation: 400 to 500 mm (16 to 20 in)
Mean annual air temperature: -6 to -1 degrees C. (21 to 30 degrees F.)
Frost free period: 70 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Kinak,
Muskox, Tuttu,
Iyagak,
Imnak, and
Niakuk soils.
Kinak soils have an umbric epipedon, a cambic horizon at depths between 50 to 100 cm (20 to 40 in), and occur on similar landforms on backslope positions.
Muskox soils have an umbric epipedon, a cambic horizon at depths between 33 to 120 cm (13 to 47 in), a coarse-loamy particle size class, and occur on similar landforms on swale microfeatures.
Tuttu soils have an umbric epipedon, andic soil properties at depths between 14 to 37 cm (6 to 15 in), and occur on similar landforms on backslope and footslope positions.
Iyagak soils have an ochric epipedon, a cambic horizon at depths between 20 to 37 cm (8 to 15 in), a fragmental particle size class, and occur on similar landforms on swale microfeatures.
Imnak soils have paralithic contact at depths between 37 to 95 cm (15 to 37 in), a fragmental particle size class, and occur on similar landforms on backslope positions.
Niakuk soils have an ochric epipedon, a cambic horizon at depths between 12 to 56 cm (5 to 22 in), lithic contact at depths between 120 to 145 cm (47 to 57 in), and occur on similar landforms on backslope positions.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well drained
Saturated Hydraulic Conductivity: very high in the Oi and Oe horizons, moderately high in the Bw1 horizon, and moderately high to high in the Bw2 and C horizons
Permeability: rapid to very rapid in the Oi and Oe horizons, moderate in the Bw1 horizon, moderate to moderately rapid in the Bw2 horizon, and moderate to rapid in the C horizon
Runoff: medium or high
USE AND VEGETATION:
Use: wildlife habitat, recreation, and subsistence
Native vegetation: field horsetail, polytrichum moss, fireweed, Siberian alder, dwarf birch, white spruce, bog blueberry, marsh Labrador tea, grayleaf willow, lingonberry, resin birch, and beauverd spirea.
DISTRIBUTION AND EXTENT: MLRA 240, Nulato Hills-Southern Seward Peninsula Highlands. The series is of moderate extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Wasilla, Alaska
SERIES ESTABLISHED: Nulato Hills - Continental Divide and Blackburn Hills Soil Survey, Alaska, 2024.
REMARKS: Diagnostic features and horizons recognized in this profile include:
Particle-size control section: 40 to 115 cm (16 to 45 in)
Folistic epipedon: 0 to 15 cm (0 to 6 in) (Oi and Oe horizons)
Mollic epipedon: 15 to 67 cm (6 to 26 in) (Bw horizons)
ADDITIONAL DATA:
User pedon ID: 2021AK180869
National Cooperative Soil Survey
U.S.A.