LOCATION ANNOKSEK                AK

Established Series
IRD ATD/NDP/SCD
02/2022

ANNOKSEK SERIES

Landscape--till plain
Landform--glaciated plains
Slope--0 to 15 percent
Parent material--residuum derived from graywacke
Mean annual precipitation--about 2500 mm
Mean annual air temperature--about 6 degrees C
Depth class--shallow
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy, mixed, superactive, acid Lithic Cryorthents

TYPICAL PEDON: Annoksek sandy loam on a glaciated plain, on a slope of 5 percent at an elevation of 34 m (When described on May 29, 2013, the soil was moist throughout.)

Oi--0 to 3 cm; slightly decomposed plant material; extremely acid (pH 4.4); abrupt smooth boundary

Oa--3 to 12 cm; highly decomposed plant material; very strongly acid (pH 4.7); abrupt smooth boundary

C--12 to 30 cm; sandy loam, gray (5Y 5/1) dry, dark gray (5Y 4/1) moist; massive; soft, very friable, nonsticky and slightly plastic; common very fine, fine, medium, and very coarse roots throughout; few fine and common very fine interstitial pores; strongly acid (pH 5.3); clear smooth boundary

R--30 cm; graywacke

TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; Hoonah-Angoon Census Area; latitude 58.2471006, longitude -136.5824703, datum WGS84 (coordinates determined by a GPS unit)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 7 degrees C
Depth to bedrock--25 to 50 cm (shallow)
Soil moisture control section--dry less than 45 consecutive days in June through October (udic)

Particle-size control section
*Clay content--10 to 18 percent
*Total rock fragment content--0 to 10 percent

Oi
Thickness--0 to 3 cm

Oa
Thickness--3 to 12 cm

C horizon
Hue--5Y to 2.5Y moist or dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 or 2 moist or dry
Clay content--10 to 18 percent
Rock fragment content--5 to 10 percent
Reaction (pH)--4.3 to 5.3
Thickness--4 to 18 cm

COMPETING SERIES: None

GEOGRAPHIC SETTING:
Elevation--0 to 70 m
Climate--cool, moist summers; mild, wet winters
Mean annual precipitation--1780 to 3320 mm
Mean annual air temperature--3 to 8 degrees C
Frost-free period--90 to 154 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Ancon--spodic horizon; 100 to 150 cm (deep) to a lithic contact; on similar landforms
Bulky--aquic conditions within 25 cm of soil surface; in concave, ponded areas of adjacent landforms
Fingers--frequent, brief periods of flooding; 25 to 50 cm (somewhat poorly drained) to aquic conditions; in drainageways of adjacent landforms
Kashoto--organic; in depressions of adjacent glaciated plains
Murkbay--no lithic contact within a depth of more than 150 cm (very deep); not subject to flooding; on similar landforms

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--high throughout

USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation--Alaska cedar, fernleaf goldthread, bunchberry dogwood, Lapland cornel, dicranum moss, splendid feather moss, heartleaf twayblade, American skunkcabbage, rusty menziesia, sidebells wintergreen, Schreber's big red stem moss, Alaska blueberry

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 in this pedon
*Depth to lithic contact--30 cm
*Particle-size control section--zone from 12 to 30 cm

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National Cooperative Soil Survey
U.S.A.