LOCATION ABDALLAH                AK

Established Series
IRD NDP/TD/SCD
12/2022

ABDALLAH SERIES


Landscape--mountains
Landform--avalanche chutes of mountain slopes
Slope--40 to 90 percent
Parent material--colluvium
Mean annual precipitation--about 2510 mm
Mean annual air temperature--about 9 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, acid Typic Cryorthents

TYPICAL PEDON: Abdallah sandy loam in an avalanche chute, on a mountain backslope of 50 percent at an elevation of 90 m (When described on June 1, 2013, the soil was moist throughout.)

Oi--0 to 3 cm; slightly decomposed plant material; very strongly acid (pH 4.6); clear smooth boundary

A--3 to 20 cm; extremely cobbly sandy loam, dark gray (10YR 4/1) dry, black (10YR 2/1) moist; moderate medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine, medium, and coarse and many fine roots throughout; common very fine and fine interstitial pores; 5 percent gravel and 60 percent cobbles; extremely acid (pH 4.4); clear smooth boundary

C--20 to 150 cm; extremely cobbly sandy loam, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; structureless massive structure; soft, very friable, nonsticky and nonplastic; common very fine, fine, medium, and coarse roots throughout; few fine and common very fine interstitial pores; 5 percent gravel, 30 percent stones, and 50 percent cobbles; very strongly acid (pH 4.6)

TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Hoonah-Angoon Census Area, Alaska; latitude 58.3666077, longitude -136.5440906, 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

Particle-size control section
*Clay content--3 to 7 percent
*Total rock fragment content--65 to 85 percent

Oi horizon
Thickness--0 to 3 cm
Rock fragment content--15 to 35 percent

A horizon
Value--2 or 3 moist, 4 or 5 dry
Chroma--1 to 3 moist or dry
Content of clay--3 to 7 percent
Rock fragment content--60 to 75 percent
Gravel content--2 to 8 percent
Cobble content--50 to 65 percent
Reaction (pH)--4.2 to 4.7
Thickness--3 to 17 cm

C horizon
Hue--10YR or 2.5Y moist or dry
Value--3 or 4 moist, 5 or 6 dry
Chroma--3 to 6 moist or dry
Clay content--3 to 7 percent
Rock fragment content--60 to 89 percent
Gravel content--2 to 8 percent
Cobble content--40 to 50 percent
Stone content--25 to 30 percent
Reaction (pH)--4.3 to 4.9
Thickness--20 to 135 cm

COMPETING SERIES: None

GEOGRAPHIC SETTING:
Elevation--42 to 250 m
Climate--cool, moist summers; mild, wet winters
Mean annual precipitation--1780 to 3300 mm
Mean annual air temperature--3 to 7 degrees C
Frost-free period--90 to 154 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Bergbay--umbric epipedon; 50 to 100 cm (moderately deep) to a lithic contact; on similar landforms
Boussole--25 to 50 cm (somewhat poorly drained) to aquic conditions; 50 to 100 cm (moderately deep) to a lithic contact; on similar landforms
Fingers--frequent periods of flooding; 25 to 50 cm (somewhat poorly drained) to aquic conditions; in drainageways of adjacent landforms
Passage--spodic horizon; 50 to 100 cm (moderately deep) to a lithic contact; on similar landforms
Justicecreek--lithic contact within 25 cm of the surface (very shallow); organic; on similar landforms
Kashoto--organic; in muskegs of similar landforms
Kutskloh--histic epipedon; aquic conditions within 25 cm of the surface; on similar landforms
Toyatte--25 to 50 cm (shallow) to a lithic contact; 25 to 50 cm (somewhat poorly drained) to aquic conditions; in muskegs of similar landforms

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

USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential natural vegetation--moss, Sitka alder, Sitka spruce, Schreber's big red stem moss, polytrichum moss, rhizomnium moss, stink currant, salmonberry, red elderberry

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
*Ochric epipedon
*Particle-size control section--zone from 28 to 103 cm


National Cooperative Soil Survey
U.S.A.