LOCATION DAGELET AK
Established Series
IRD. NDP/SCD
02/2022
DAGELET SERIES
Landscape--mountains
Landform--mountain slopes
Slope--20 to 55 percent
Parent material--colluvium over residuum
Mean annual precipitation--about 1400 mm
Mean annual air temperature--about 5 degrees C
Depth class--moderately deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, nonacid Typic Cryorthents
TYPICAL PEDON: Dagelet sandy loam on a mountain slope of 38 percent at an elevation of 20 m (When described on August 28, 2013, the soil was moist throughout.)
Oe--0 to 3 cm; moderately decomposed plant material; strongly acid (pH 5.3); abrupt smooth boundary
A--3 to 8 cm; gravelly sandy loam, dark grayish brown (10YR 4/2) dry, very dark brown (10YR 2/2) moist; moderate medium granular structure; slightly hard, friable, nonsticky and nonplastic; common very fine, fine, coarse, and very coarse roots and many medium roots throughout; common very fine and fine interstitial pores; 3 percent cobbles, 5 percent medium gravel, and 10 percent fine gravel; moderately acid (pH 5.9); abrupt wavy boundary
AC--8 to 37 cm; very gravelly coarse sandy loam, pale yellow (2.5Y 7/4) dry, light olive brown (2.5Y 5/4) moist; weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine, fine, coarse, and very coarse roots throughout; common very fine and fine interstitial pores; 3 percent cobbles, 15 percent medium gravel, and 20 percent fine gravel; moderately acid (pH 5.9); clear wavy boundary
C--37 to 60 cm; very gravelly coarse sandy loam, light gray (2.5Y 7/1) dry, gray (2.5Y 5/1) moist; massive; soft, very friable, nonsticky and nonplastic; common medium and fine roots throughout; common very fine and fine interstitial pores; 3 percent cobbles, 15 percent medium gravel, and 25 percent fine gravel; strongly acid (pH 5.5); abrupt wavy boundary
2R--60 cm; bedrock
TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; Hoonah-Angoon Census Area; latitude 58.8995090, longitude -136.9246536, 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)
Depth to lithic contact--50 to 100 cm
Particle-size control section
*Clay content--3 to 8 percent
*Total rock fragment content--35 to 60 percent
Oe horizon
Thickness--0 to 9 cm
A horizon
Hue--10YR or 2.5Y moist or dry
Value--2 to 4 moist, 4 to 6 dry
Chroma--2 to 6 moist or dry
Fine-earth texture--sandy loam, coarse sandy loam, silt loam
Clay content--3 to 8 percent
Gravel content--15 to 40 percent
Reaction (pH)--5.7 to 5.9
Thickness--3 to 15 cm
AC horizon
Hue--10YR or 2.5Y moist or dry
Value--4 or 5 moist, 6 or 7 dry
Chroma--4 or 6 moist or dry
Fine-earth texture--coarse sandy loam, sandy loam, silt loam
Clay content--3 to 8 percent
Gravel content--35 to 50 percent
Reaction (pH)--5.9 to 7.3
Thickness--25 to 45 cm
C horizon
Hue--10YR to 5Y moist or dry
Value--4 to 5 moist, 6 to 7 dry
Chroma--1 to 4 moist or dry
Fine-earth texture--coarse sandy loam, sandy loam, silt loam
Clay content--3 to 8 percent
Gravel content--35 to 50 percent
Reaction (pH)--5.0 to 6.0
Thickness--15 to 30 cm
COMPETING SERIES:
Enigma--free carbonates throughout
GEOGRAPHIC SETTING:
Elevation--0 to 250 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:
Nunatak--cambic horizon; on adjacent hills
Polkapen--redoximorphic concentrations within 25 cm of soil surface; on adjacent hills
Seclusion--free carbonates in upper part; on steeper escarpments
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--very high in A horizon, high in AC and C horizons
USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation--Sitka willow, grayleaf willow, Canadian burnet, sprouting leaf willow, oval-leaf blueberry, fowl bluegrass, Nootka lupine, kinnikinnick, dwarf fireweed, sidebells wintergreen, leathery grapefern
DISTRIBUTION AND EXTENT: Alexander Archipelago-Gulf of Alaska Coast, Alaska; MLRA 220; moderate 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
*Ochric epipedon
*Depth to lithologic discontinuity--60 cm
*Depth to lithic contact--60 cm
*Particle-size control section--zone from 25 to 60 cm
National Cooperative Soil Survey
U.S.A.