LOCATION LAMPLUGH AK
Established Series
IRD. JDP/NDP/SCD
05/2022
LAMPLUGH SERIES
Landscape--outwash plains
Landform--outwash deltas
Slope--0 to 10 percent
Parent material--organic material over outwash
Mean annual precipitation--about 1400 mm
Mean annual air temperature--about 5 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--aquic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, nonacid Typic Cryaquepts
TYPICAL PEDON: Lamplugh sandy loam, forested, on an outwash delta, on a slope of 2 percent at an elevation of 20 m (When described on June 23, 2014, the soil was moist from the surface to a depth of 21 cm and wet from a depth of 21 to 150 cm.)
Oe--0 to 15 cm; moderately decomposed plant material, very dark brown (7.5YR 2.5/2) moist; ultra acid (pH 3.4); clear wavy boundary
Oa--15 to 19 cm; highly decomposed plant material, black (7.5YR 2.5/1) moist; extremely acid (pH 3.7); abrupt wavy boundary
E--19 to 21 cm; sandy loam, light brownish gray (2.5Y 6/2) dry, dark grayish brown (2.5Y 4/2) moist; moderate fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine, medium, and coarse roots throughout; common very fine and fine irregular pores; extremely acid (pH 4.4); abrupt wavy boundary
Bw1--21 to 35 cm; sandy loam, 60 percent brown (7.5YR 5/2) and 40 percent brown (7.5YR 5/3) dry, 60 percent dark brown (7.5YR 3/2) and 40 percent dark brown (7.5YR 3/3) moist; moderate medium and coarse subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine, fine, and medium roots throughout; common very fine and fine irregular pores; 2 percent grayish brown (2.5Y 5/2) iron depletions and 5 percent strong brown (7.5YR 4/6) masses of oxidized iron in matrix; very strongly acid (pH 4.7); clear wavy boundary
Bw2--35 to 54 cm; silty clay loam, very pale brown (10YR 7/3) dry, brown (10YR 5/3) moist; moderate coarse subangular blocky structure; slightly hard, friable, moderately sticky and slightly plastic; common fine roots throughout; common very fine and fine irregular pores; 5 percent gray (N 6/0) iron depletions and 10 percent brown (7.5YR 4/4) masses of oxidized iron; slightly acid (pH 6.1); gradual wavy boundary
Cg1--54 to 70 cm; very fine sandy loam, light brownish gray (2.5Y 6/2) dry, dark grayish brown (2.5Y 4/2) moist; moderate fine and medium subangular blocky structure parting to weak thin platy; soft, very friable, nonsticky and nonplastic; common very fine and fine irregular pores; 5 percent gray (2.5Y 5/1) iron depletions and 10 percent brown (7.5YR 4/4) masses of oxidized iron; noneffervescent (HCL, 1N); slightly acid (pH 6.4); clear wavy boundary
Cg2--70 to 200 cm; silty clay loam, light gray (10YR 7/1) dry, gray (10YR 5/1) moist; massive; moderately hard, firm, moderately sticky and slightly plastic; common very fine and fine irregular pores; 10 percent dark yellowish brown (10YR 4/4) masses of oxidized iron; very slightly effervescent (HCL, 1N); neutral (pH 7.1)
TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; Hoonah-Angoon Census Area, Alaska; latitude 58.3951380, longitude -135.8691300, 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 within 25 cm of soil surface year round
Depth to redoximorphic iron concentrations and depletions--within 25 cm of the soil surface
Thickness of cambic horizon--15 to 60 cm
Clay content in particle-size control section--5 to 30 percent, but not more than 18 percent by weighted average
Oe horizon
Thickness--5 to 20 cm
Oa horizon
Thickness--1 to 10 cm
E horizon
Hue--10YR or 2.5Y moist or dry
Value--4 to 7 moist, 6 to 8 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--sandy loam, fine sandy loam
Clay content--8 to 12 percent
Reaction (pH)--4.4 to 5.4
Thickness--1 to 8 cm
Bw horizons
Hue--7.5YR to 2.5Y moist or dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--sandy loam, fine sandy loam, silty clay loam
Clay--8 to 30 percent
Reaction (pH)--4.7 to 6.1
Thickness--15 to 60 cm
Cg horizons
Hue--10YR, 2.5Y, or neutral moist or dry
Value--4 or 5 moist, 6 or 7 dry
Chroma--1, 2, or 0 moist or dry
Fine-earth texture--silt loam, sandy loam, fine sandy loam, loam, silty clay loam
Clay content--5 to 30 percent
Reaction (pH)--6.1 to 7.2
Effervescence--noneffervescent to slightly effervescent
Thickness--15 to 90 cm
COMPETING SERIES:
Ewan--glacial lacustrine and alluvium derived fine earth fraction without an Albic horizon
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--1 to 9 degrees C
Frost-free period--90 to 154 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Bartlettcove--spodic horizon; on adjacent landforms
Gustavus--no folistic epipedon; no water table within a depth of 150 cm (well drained); on adjacent landforms
Ibach--umbric epipedon; on adjacent landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--poorly drained
Depth to saturation in normal years--within 25 cm of soil surface in April through December
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high in E, Bw1, and Cg1 horizons; moderately high in Bw2 and Cg2 horizons
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential natural vegetation--Sitka alder, marsh horsetail, heartleaf twayblade, Sitka spruce, western hemlock, mountain hemlock, oval-leaf 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
*Folistic epipedon--zone from the surface to a depth of 19 cm
*Albic horizon--zone from 19 to 21 cm
*Aquic conditions--zone from 21 to 150 cm
*Redoximorphic concentrations--zone from 21 to 150 cm
*Redoximorphic depletions--zone from 21 to 70 cm
*Cambic horizon--zone from 21 to 54 cm
*Reduced matrix--zone from 70 to 150 cm
*Free carbonates--zone from 70 to 150 cm
*Particle-size control section--zone from 44 to 119 cm
National Cooperative Soil Survey
U.S.A.