LOCATION KADACHAN AK
Established Series
IRD. ABD/NDP/SCD
05/2022
KADACHAN SERIES
Landscape--mountains
Landform--drainageways of mountain slopes
Slope--15 to 60 percent
Parent material--alluvium
Mean annual precipitation--about 1400 mm
Mean annual air temperature--about 5 degrees C
Depth class--very deep
Drainage class--moderately well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--aquic
TAXONOMIC CLASS: Sandy-skeletal, mixed Oxyaquic Cryofluvents
TYPICAL PEDON: Kadachan fine sand in a drainageway of a mountain slope of 15 percent at an elevation of 114 m (When described on August 28, 2013, the soil was moist from the surface to a depth of 65 cm and wet from a depth of 65 to 150 cm.)
C1--0 to 11 cm; fine sand, light gray (2.5Y 7/1) dry, gray (2.5Y 5/1) moist; single grain; soft, very friable, nonsticky and nonplastic; common very fine and medium and many fine roots throughout; common very fine and fine interstitial pores; noneffervescent; slightly acid (pH 6.2); clear irregular boundary
C2--11 to 18 cm; very stony fine sand, grayish brown (2.5Y 5/2) dry, very dark grayish brown (2.5Y 3/2) moist; single grain; soft, very friable, nonsticky and nonplastic; many very fine and fine and common medium and coarse roots throughout; common very fine and fine interstitial pores; 10 percent cobbles and 30 percent stones, by volume; noneffervescent; moderately acid (pH 5.6); clear irregular boundary
C3--18 to 150 cm; variegated boulders; single grain; loose, nonsticky and nonplastic; 3 percent gravel, 5 percent cobbles, 10 percent stones, and 70 percent boulders, by volume; noneffervescent; moderately acid (pH 5.7)
TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; Hoonah-Angoon Census Area; latitude 58.8814133, longitude -136.8713993, 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 5 percent (insufficient fine-earth fraction to fill all interstices)
*Total rock fragment content--90 to 94 percent
C1 horizon
Hue--10YR to 5Y moist or dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 to 4 moist or dry
Fine-earth texture--sandy loam, fine sand, sand
Clay content--1 to 5 percent
Sand content--70 to 95 percent
Reaction (pH)--6.1 to 6.8
Thickness--0 to 20 cm
C2 horizon
Hue--10YR to 5Y moist or dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--2 to 4 moist or dry
Fine-earth texture--fine sand, sand
Clay content--1 to 5 percent
Sand content--86 to 95 percent
Total rock fragment content--35 to 65 percent
Gravel content--2 to 15 percent
Cobble content--0 to 10 percent
Stone content--25 to 45 percent
Reaction (pH)--5.1 to 6.8
Thickness--5 to 25 cm
C3 horizon
Clay content--1 to 5 percent (insufficient fine-earth fraction to fill all interstices)
Total rock fragment content--80 to 88 percent
Gravel content--2 to 15 percent
Cobble content--3 to 10 percent
Stone content--5 to 25 percent
Boulder content--60 to 85 percent
Thickness--90 to 140 cm
COMPETING SERIES:
Awayak--A Lithologic Discontinuity occurs below the surface A horizon and the soil experiences frequent flooding for a very brief duration during part of the growing season.
GEOGRAPHIC SETTING:
Elevation--20 to 250 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 109 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Bearisland--free carbonates throughout particle-size control section; on moraines of similar landforms
Skarn--free carbonates throughout particle-size control section; 100 to 150 cm (deep) to a lithic contact; on similar landforms
Polkapenn--25 to 50 cm (shallow) to a lithic contact; on adjacent landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--moderately well drained
Saturation in normal years--oxygenated water table below a depth of 50 cm in April through December
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--very high throughout
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--Sitka alder, common ladyfern, climacium moss, spreading woodfern, balsam poplar, rhizomnium moss, goose neck moss, stink currant, salmonberry, Sitka willow
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; 2020.
REMARKS:
Diagnostic horizons and other features in this pedon
*Ochric epipedon
*Particle-size control section--zone from 25 to 100 cm
National Cooperative Soil Survey
U.S.A.