LOCATION FINGERS AK
Established Series
IRD. NDP/SCD
05/2022
FINGERS SERIES
Landscape--outwash plains
Landform--drainageways of glaciated plains
Slope--0 to 5 percent
Parent material--alluvium
Mean annual precipitation--about 1400 mm
Mean annual air temperature--about 5 degrees C
Depth class--very deep
Drainage class--somewhat poorly drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--aquic
TAXONOMIC CLASS: Sandy-skeletal, mixed Oxyaquic Cryorthents
TYPICAL PEDON: Fingers loamy coarse sand in a drainageway of a glaciated plain, on a slope of 2 percent at an elevation of 22 m (When described on June 6, 2013, the soil was moist from the surface to a depth of 43 cm and wet from a depth of 43 to 150 cm.)
Oi--0 to 2 cm; slightly decomposed plant material; neutral (pH 6.9); abrupt smooth boundary
A--2 to 8 cm; very gravelly loamy coarse sand, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; weak granular structure; soft, very friable, nonsticky and nonplastic; common very fine, fine, medium, and coarse roots throughout; common very fine and fine interstitial pores; 2 percent stones, 5 percent cobbles, 10 percent medium gravel, and 25 percent fine gravel; very slightly effervescent; slightly alkaline (pH 7.4); clear smooth boundary
C1--8 to 43 cm; variegated extremely gravelly coarse sand; single grain; loose, nonsticky and nonplastic; common very fine, fine, medium, and coarse roots throughout; common very fine and fine interstitial pores; 2 percent stones, 10 percent cobbles, 25 percent medium gravel, and 25 percent fine gravel; noneffervescent; moderately alkaline (pH 8.3); gradual smooth boundary
C2--43 to 150 cm; variegated extremely gravelly coarse sand; single grain; loose, nonsticky and nonplastic; 4 percent stones, 10 percent fine gravel, 10 percent cobbles, and 50 percent medium gravel; noneffervescent; strongly alkaline (pH 8.5)
TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; Hoonah-Angoon Census Area, Alaska; latitude 58.6572803, longitude -136.4027196, 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 7 percent
*Total rock fragment content--35 to 85 percent
Oi horizon
Thickness--0 to 5 cm
A horizon
Value--3 to 5 moist, 5 to 7 dry
Chroma--2 to 4 moist or dry
Fine-earth texture--loamy coarse sand, loamy sand, sand
Content of clay--1 to 7 percent
Reaction (pH)--5.7 to 7.4
Thickness--5 to 15 cm
C1 horizon
Hue--10YR to 5Y moist or dry, variegated
Value--3 to 5 moist, 5 to 7 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--coarse sand, sand
Content of clay--2 to 5 percent
Reaction (pH)--6.6 to 8.3
Thickness--30 to 55 cm
C2 horizon
Hue--10YR to 5Y moist or dry, variegated
Value--3 to 5 moist, 5 to 7 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--coarse sand, sand
Content of clay--2 to 5 percent
Reaction--7.0 to 8.5 pH
Thickness--50 to 110 cm
COMPETING SERIES:
Kocacho--gravelly silt loam in upper part; mean annual precipitation of less than 850 mm
Puffin--free carbonates throughout
Tangoe--pH of 5.6 to 6.5 in particle-size control section
GEOGRAPHIC SETTING:
Elevation--10 to 130 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:
Ancon--100 to 150 cm (deep) to a lithic contact; on similar landforms
Annoksek--25 to 50 cm (shallow) to a lithic contact; on adjacent landforms
Bulky--saturation and aquic conditions within 25 cm of soil surface; on similar landforms
Kashoto--organic; in muskegs of adjacent landforms
Murkbay--no aquic conditions within a depth of 150 cm; on adjacent landforms
Sitakaday--saturation and aquic conditions within 25 cm of soil surface; on adjacent landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat poorly drained
Saturated hydraulic conductivity (Ksat)--very high throughout
Depth to saturation in normal years--more than 25 cm year round
USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation--Sitka alder, stink currant, salmonberry, Sitka willow, devilsclub, field horsetail
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
*Oxyaquic conditions--oxygenated water table below a depth of 25 cm
*Particle-size control section--zone from 27 to 102 cm
National Cooperative Soil Survey
U.S.A.