LOCATION GUSTAVUS                AK

Established Series
IRD. NDP/SCD
05/2022

GUSTAVUS SERIES

Landscape--outwash plains
Landform--outwash deltas
Slope--0 to 30 percent
Parent material--outwash
Mean annual precipitation--about 1400 mm
Mean annual air temperature--about 5 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Sandy, mixed Typic Haplocryepts

TYPICAL PEDON: Gustavus fine sandy loam, forested, on an outwash delta, on a slope of 3 percent at an elevation of 6 m (When described on July 29, 2014, the soil was moist throughout.)

Oe--0 to 12 cm; moderately decomposed plant material; extremely acid (pH 4.3); abrupt smooth boundary

Bw--12 to 33 cm; fine sandy loam, yellow (10YR 7/6) dry, yellowish brown (10YR 5/6) moist; moderate medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine, fine, medium, coarse, and very coarse roots throughout; common very fine and fine irregular pores; noneffervescent; moderately acid (pH 5.7); clear smooth boundary

C1--33 to 68 cm; loamy sand, pale yellow (2.5Y 8/3) dry, light yellowish brown (2.5Y 6/3) moist; massive; soft, very friable, nonsticky and nonplastic; common fine, medium, coarse, and very coarse roots throughout; common very fine and fine interstitial pores; noneffervescent; moderately acid (pH 6.0); clear wavy boundary

C2--68 to 140 cm; loamy sand, pale yellow (2.5Y 8/3) dry, light yellowish brown (2.5Y 6/3) moist; 15 percent medium strong brown (7.5YR 5/6) mottles; massive; soft, very friable, nonsticky and nonplastic; common medium roots throughout; common very fine and fine interstitial pores; very slightly effervescent (HCL, 1N); neutral (pH 6.6); abrupt smooth boundary

C3--140 to 150 cm; variegated coarse sand; single grain; loose, nonsticky and nonplastic; few very fine and fine interstitial pores; slight effervescent (HCL, 1N); neutral (pH 7.2)

TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; Hoonah-Angoon Census Area, Alaska; latitude 58.4409220, longitude -135.7240970, 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 30 cm
Other features--free carbonates

Particle-size control section
*Clay content--1 to 5 percent
*Total rock fragment content--0 to 25 percent

Oe horizon
Thickness--5 to 14 cm

Bw horizon
Hue--7.5YR or 10YR moist or dry
Value--4 or 5 moist, 6 or 7 dry
Chroma--4 to 6 moist or dry
Fine-earth texture--fine sandy loam, sandy loam, loamy sand
Clay content--2 to 5 percent
Sand content--55 to 75 percent
Reaction (pH)--4.5 to 6.5
Thickness--15 to 30 cm

C horizons
Hue--10YR to 5Y moist or dry
Value--4 to 6 moist, 6 to 8 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--loamy sand, sand, coarse sand
Clay content--1 to 5 percent
Sand content--82 to 98 percent
Total rock fragment content--0 to 25 percent gravel
Reaction (pH)--5.5 to 7.5
Thickness--10 to 120 cm

COMPETING SERIES:
Beales, Chistna--lithologic discontinuity; no free carbonates in C horizon
Chistochina--lithologic discontinuity; comprised of till parent material

GEOGRAPHIC SETTING:
Elevation--0 to 50 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:
Bartlettcove--spodic horizon; albic horizon; on adjacent landforms
Geikie--lithologic discontinuity; on similar landforms
Ibach--umbric epipedon; on adjacent landforms
Lamplugh--saturation and aquic conditions within 25 cm of soil surface; on adjacent landforms
Perouse--saturation and aquic conditions at or near soil surface; on similar landforms
Scidmore--redoximorphic concentrations within 25 cm of soil surface; on similar landforms

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Depth to saturation in normal years--more than 150 cm year round
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high or very high throughout

USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--Sitka alder, western rattlesnake plantain, splendid feather moss, heartleaf twayblade, sidebells wintergreen, Sitka spruce, Schreber's big red stem moss, goose neck moss, strawberryleaf raspberry, western hemlock, Alaska blueberry, oval-leaf blueberry

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

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

SERIES PROPOSED: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; 2020; name from city of Gustavus, Alaska

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Cambic horizon--zone from 12 to 33 cm
*Free carbonates--zone from 68 to 150 cm
*Particle-size control section--37 to 112 cm

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National Cooperative Soil Survey
U.S.A.