LOCATION EXCURSION               AK

Established Series
IRD. NDP/SCD
02/2022

EXCURSION SERIES

Landscape--outwash plains
Landform--outwash deltas
Slope--0 to 5 percent
Parent material--mossy organic material over outwash
Mean annual precipitation--about 1400 mm
Mean annual air temperature--about 5 degrees C
Depth class--very deep
Drainage class--very poorly drained
Soil moisture regime--aquic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, nonacid Typic Cryaquents

TYPICAL PEDON: Excursion loam on an outwash delta, on a slope of 0 percent at an elevation of 4 m (When described on June 23, 2014, the soil was wet throughout.)

Oi--0 to 14 cm; peat; slightly acid (pH 6.1); clear smooth boundary

Oe--14 to 26 cm; mucky peat; slightly acid (pH 6.4); abrupt smooth boundary

Cg1--26 to 70 cm; loam, dark gray (5Y 4/1) dry, dark gray (N 4/0) moist; massive; soft, very friable, slightly sticky and nonplastic; common medium and fine roots; few fine and very fine interstitial pores; neutral (pH 7.3); diffuse smooth boundary

Cg2--70 to 150 cm; very fine sandy loam, dark gray (5Y 4/1) dry, gray (N 5/0) moist; single grain; loose, nonsticky and nonplastic; very slightly effervescent (HCL, 1N); moderately alkaline (pH 8.1)

TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; Hoonah-Angoon Census Area; latitude 58.3892690, longitude -135.8480490, datum WGS84 (coordinates determined by a GPS unit)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 7 degrees C
Soil moisture control section--normally saturated at or near the soil surface year round
Thickness of histic epipedon--20 to 35 cm
Clay content in particle-size control section--6 to 15 percent

Oi horizon
Thickness--5 to 20 cm

Oe horizon
Thickness--10 to 20 cm

Cg1 horizon
Hue--10YR to 5Y moist or dry, neutral wet
Value--2.5 to 4 moist, 4 to 6 dry
Chroma--0 to 4 moist or dry
Fine-earth texture--loam, fine sandy loam, sandy loam, silt loam
Clay content--10 to 15 percent
Reaction (pH)--6.7 to 7.8
Thickness--40 to 60 cm

Cg2 horizon
Hue--10YR to 5Y moist or dry, neutral wet
Value--2.5 to 4 moist, 4 to 6 dry
Chroma--0 to 4 moist or dry
Fine-earth texture--very fine sandy loam, fine sandy loam, sandy loam, silt loam
Clay content--6 to 9 percent
Reaction (pH)--6.4 to 8.5
Effervescence--noneffervescent to slightly effervescent
Thickness--65 to 90 cm

COMPETING SERIES:
Aquatna--no histic epipedon
Beluga, Moose River--no histic epipedon; lithologic discontinuity
Noonku--no histic epipedon; lithologic discontinuity; redoximorphic concentrations within 25 cm of soil surface
Susivar--no histic epipedon; redoximorphic concentrations within 25 cm of soil surface

GEOGRAPHIC SETTING:
Elevation--0 to 20 m
Climate--cool, moist summers; mild, wet winters
Mean annual precipitation--850 to 1850 mm
Mean annual air temperature--0 to 9 degrees C
Frost-free period--90 to 154 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Geikie--cambic horizon; on similar landforms
Glacierbay--lithologic discontinuity; on similar landforms
Icy--more than 18 percent clay, weighted average, in particle size control section; on adjacent landforms
Sitakaday--saturation and aquic conditions within 25 cm of soil surface; on similar landforms
Strawberry--calcareous throughout particle-size control section; on adjacent landforms
Topsy--redoximorphic concentrations and depletions within 25 cm of soil surface; on similar landforms

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--very poorly drained
Depth to saturation in normal years--at or near soil surface year round
Ponding--frequent, long periods
Saturated hydraulic conductivity (Ksat)--high throughout

USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential natural vegetation--common yarrow, Sitka alder, kneeling angelica, water horsetail, marsh horsetail, white cottongrass, threepetal bedstraw, sweetgale, Sitka spruce, small cranberry, Alaska Indian paintbrush, Barclay's willow, undergreen willow, willowherb, silvery sedge

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.

REMARKS:
Diagnostic horizons and other features in this pedon
*Fibric soil material--zone from the surface to a depth of 14 cm
*Hemic soil material--zone from 14 to 26 cm
*Histic epipedon--zone from the surface to a depth of 26 cm
*Aquic conditions--zone from the surface to a depth of 150 cm
*Reduced matrix--zone from 26 to 150 cm
*Free carbonates--zone from 70 to 150
*Particle-size control section--zone from 51 to 126 cm

---

National Cooperative Soil Survey
U.S.A.