LOCATION KAKNAU                  AK

Established Series
IRD. SMC/NDP/SCD
12/2022

KAKNAU SERIES

Landscape--hills
Landform--glacially modified hillslopes
Slope--5 to 60 percent
Parent material--colluvium over residuum
Mean annual precipitation--about 1400 mm
Mean annual air temperature--about 4 degrees C
Depth class--moderately deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive Typic Haplocryepts

TYPICAL PEDON: Kaknau very fine sandy loam, forested, on a glacially modified hillslope of 20 percent at an elevation of 60 m (When described on June 3, 2015, the soil was moist throughout.)

Oe--0 to 4 cm; moderately decomposed plant material; neutral (pH 6.6); abrupt smooth boundary

A--4 to 12 cm; very fine sandy loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine, medium, and coarse roots throughout; common very fine and fine irregular pores; slightly acid (pH 6.2); abrupt smooth boundary

Bw--12 to 40 cm; cobbly very fine sandy loam, 90 percent reddish yellow (7.5YR 6/6) and 10 percent light yellowish brown (2.5Y 6/3) dry, 90 percent strong brown (7.5YR 4/6) and 10 percent olive brown (2.5Y 4/3) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common fine roots throughout; common very fine and fine irregular pores; 30 percent subangular cobbles, by volume; moderately acid (pH 5.7); abrupt broken boundary

B/C--40 to 87 cm; silt loam, 90 percent gray (10YR 6/1) and 10 percent light yellowish brown (2.5Y 6/3) dry, 90 percent dark gray (10YR 4/1) and 10 percent olive brown (2.5Y 4/3) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine and fine irregular pores; moderately acid (pH 5.9); abrupt wavy boundary

2Cr--87 cm; paralithic bedrock

TYPE LOCATION: Glacier Bay National Park and Preserve-Yakutat Area, Alaska; Yakutat City and Borough Census Area; latitude 59.0966667, longitude -138.2616469, datum WGS84 (coordinates determined by a GPS unit)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 7 degrees C
Soil moisture control section--dry less than 45 consecutive days in June through October (udic)
Thickness of cambic horizon--15 to 35 cm
Depth to paralithic contact--50 to 100 cm

Particle-size control section
*Clay content--1 to 7 percent
*Total rock fragment content--15 to 30 percent cobbles

Oe horizon
Thickness--0 to 10 cm

A horizon
Value--2 to 4 moist, 4 to 6 dry
Chroma--1 to 4 moist or dry
Fine-earth texture--very fine sandy loam, sandy loam
Clay content--1 to 5 percent
Reaction (pH)--6.1 to 6.3
Thickness--5 to 15 cm

Bw horizon
Hue--7.5YR to 2.5Y moist or dry
Value--3 or 4 moist, 5 or 6 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--very fine sandy loam, sandy loam
Clay content--1 to 5 percent
Total rock fragment content--15 to 35 percent cobbles
Reaction (pH)--5.5 to 5.9
Thickness--15 to 60 cm

B/C or BC horizon
Hue--7.5YR to 2.5Y moist or dry
Value--3 or 4 moist, 5 or 6 dry
Chroma--1 to 4 moist or dry
Fine-earth texture--silt loam, sandy loam
Clay content--4 to 7 percent
Reaction (pH)--5.5 to 6.0
Thickness--35 to 90 cm

COMPETING SERIES:
Progress--no paralithic contact within a depth of more than 150 cm (very deep); derived from eolian material
Eska--no paralithic contact within a depth of more than 150 cm (very deep); saturation and aquic conditions within 25 cm of soil surface
Ganhona--no paralithic contact within a depth of more than 150 cm (very deep); derived from loess over alluvium
Kalambach, Southpaw--no paralithic contact within a depth of more than 150 cm (very deep); derived from loess over till
Steese--50 to 100 cm (moderately deep) to a lithic contact (schist); common or many mica flakes
Tebay--no paralithic contact within a depth of more than 150 cm (very deep); lithologic discontinuity; mottles within 25 cm of soil surface
Tsana--no paralithic contact within a depth of more than 150 cm (very deep); lithologic discontinuity

GEOGRAPHIC SETTING:
Elevation--30 to 200 m
Climate--cool, moist summers; mild, wet winters
Mean annual precipitation--850 to 1850 mm
Mean annual air temperature--0 to 8 degrees C
Frost-free period--90 to 154 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Drybay--free carbonates; derived from alluvium; on adjacent landforms
Tricklake--mollic epipedon; no paralithic contact within a depth of more than 150 cm (very deep); on similar landforms
Vivid--saturation and aquic conditions within 25 cm of soil surface; subject to occasional, long periods of ponding; on adjacent landforms

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Depth to saturation in normal years--more than 150 cm
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high in A and Bw horizons, moderately high in B/C horizon, very low in Cr horizon

USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--Sitka alder, common ladyfern, small enchanter's nightshade, western oakfern, splendid feather moss, devilsclub, long beechfern, Sitka spruce, Braun's hollyfern, salmonberry, claspleaf twistedstalk, threeleaf foamflower, western hemlock, pioneer violet

DISTRIBUTION AND EXTENT: Alexander Archipelago-Gulf of Alaska Coast, Alaska; MLRA 220; small extent

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

SERIES ESTABLISHED: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; 2020.

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Cambic horizon--zone from 12 to 40 cm
*Depth to lithologic discontinuity--87 cm
*Depth to paralithic contact--87 cm
*Particle-size control section--zone from 29 to 104 cm

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National Cooperative Soil Survey
U.S.A.