LOCATION CRILLON                 AK

Established Series
IRD. SMC/NDP/SCD
02/2022

CRILLON SERIES

Landscape--hills
Landform--drumlinoid ridges
Slope--10 to 45 percent
Parent material--colluvium over residuum
Mean annual precipitation--about 3650 mm
Mean annual air temperature--about 4 degrees C
Depth class--moderately deep
Drainage class--moderately well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--aquic

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, nonacid Oxyaquic Cryorthents

TYPICAL PEDON: Crillon silt loam on a drumlinoid ridge, on a slope of 30 percent at an elevation of 41 m (When described on June 03, 2015, the soil was moist from the surface to a depth of 50 cm and wet from a depth of 50 to 60 cm.)

A--0 to 10 cm; silt loam, dark gray (10YR 4/1) dry, black (10YR 2/1) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine and medium roots throughout; common very fine and fine interstitial pores; moderately acid (pH 5.7); clear smooth boundary

Bw--10 to 20 cm; sandy loam, gray (10YR 6/1) dry, dark gray (10YR 4/1) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine, fine, and coarse roots throughout; common very fine and fine interstitial pores; 3 percent cobbles; moderately acid (pH 5.9); gradual smooth boundary

BC--20 to 60 cm; silt loam, light yellowish brown (10YR 6/4) dry, dark yellowish brown (10YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; 10 percent cobbles; strongly acid (pH 5.5); abrupt smooth boundary

2Cr--60 to 80 cm; paralithic bedrock

2R--80 cm; lithic bedrock

TYPE LOCATION: Glacier Bay National Park and Preserve-Yakutat Area, Alaska; Yakutat City and Borough Census Area; latitude 59.0928902, longitude -138.2628545, 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)

Particle-size control section
*Clay content--1 to 10 percent
*Total rock fragment content--0 to 13 percent

A horizon
Value--2 to 4 moist, 4 to 6 dry
Chroma--1 to 4 moist or dry
Fine-earth texture--silty loam, sandy loam
Clay content--3 to 10 percent
Reaction (pH)--5.5 to 5.9
Thickness--3 to 15 cm

Bw horizon
Hue--7.5YR or 10YR moist or dry
Value--3 or 4 moist, 5 or 6 dry
Chroma--1 to 4 moist or dry
Fine-earth texture--sandy loam, silt loam
Clay content--1 to 5 percent
Cobble content--2 to 5 percent
Reaction (pH)--5.7 to 5.9
Thickness--5 to 14 cm

BC horizon
Hue--10YR or 2.5Y moist or dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--silt loam, sandy loam
Clay content--1 to 5 percent
Cobble content--5 to 13 percent
Reaction (pH)--5.5 to 5.7
Thickness--30 to 50 cm

2Cr horizon
Thickness--15 to 25 cm

COMPETING SERIES: None

GEOGRAPHIC SETTING:
Elevation--35 to 200 m
Climate--cool, moist summers; mild, wet winters
Mean annual precipitation--2150 to 6400 mm
Mean annual air temperature--0 to 8 degrees C
Frost-free period--90 to 154 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Hughmiller--andic soil properties; on similar landforms
Kaknau--50 to 100 cm (moderately deep) to a lithic contact; on similar landforms

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--moderately well drained
Saturated hydraulic conductivity (Ksat)--moderately high in A and BC horizons, very high in Bw horizon
Soil moisture control section--usually saturated below a depth of 50 cm year round

USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation--Sitka alder, spreading woodfern, stink currant, salmonberry, devilsclub, red elderberry, bigflower tellima, stinging nettle, Braun's hollyfern

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
*Depth to lithic contact--80 cm
*Depth to paralithic contact--60 cm
*Depth to lithologic discontinuity--60 cm
*Particle-size control section--zone from 25 to 60 cm

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National Cooperative Soil Survey
U.S.A.