LOCATION DRYBAY AK
Established Series
IRD. NDP/SCD
02/2022
DRYBAY SERIES
Landscape--alluvial plains
Landform--terraces
Slope--0 to 10 percent
Parent material--eolian deposits over alluvium
Mean annual precipitation--about 3600 mm
Mean annual air temperature--about 4 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Sandy-skeletal, mixed Typic Cryorthents
TYPICAL PEDON: Drybay silt loam on a terrace, on a slope of 2 percent at sea level (When described on September 03, 2014, the soil was moist throughout.)
Oe--0 to 2 cm; moderately decomposed plant material; neutral (pH 6.7); abrupt smooth boundary
A--2 to 11 cm; silt loam, dark grayish brown (10YR 4/2) dry, very dark brown (10YR 2/2) moist; weak fine granular structure; slightly hard, friable, nonsticky and nonplastic; few very coarse roots, common very fine and coarse and many fine and medium roots throughout; common very fine and fine interstitial pores; slightly acid (pH 6.2); abrupt smooth boundary
2CA--11 to 24 cm; very gravelly coarse sandy loam, light yellowish brown (2.5Y 6/3) dry, olive brown (2.5Y 4/3) moist; massive; soft, very friable, nonsticky and nonplastic; common very fine, fine, medium, and coarse roots; common very fine and fine interstitial pores; 3 percent cobbles, 20 percent medium gravel, and 35 percent fine gravel; neutral (pH 6.8); gradual wavy boundary
2C1--24 to 60 cm; variegated extremely gravelly coarse sand; single grain; loose, nonsticky and nonplastic; common medium and fine roots; common very fine and few fine interstitial pores; 10 percent cobbles, 20 percent medium and coarse gravel, and 38 percent fine gravel; very slightly effervescent; moderately alkaline (pH 8.0); diffuse wavy boundary
2C2--60 to 152 cm; variegated extremely gravelly coarse sand; single grain; loose, nonsticky and nonplastic; 12 percent cobbles, 22 percent medium and coarse gravel, and 40 percent fine gravel; slightly effervescent; moderately alkaline (pH 8.1)
TYPE LOCATION: Glacier Bay National Park and Preserve-Yakutat Area, Alaska; Yakutat City and Borough Census Area; latitude 59.1813577, longitude -138.3922988, 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)
Other features--free carbonates
Particle-size control section
*Clay content--1 to 5 percent
*Total rock fragment content--40 to 89 percent
Oe horizon
Thickness--1 to 4 cm
A horizon
Value--2 to 4 moist, 4 to 6 dry
Chroma--1 to 6 moist or dry
Fine-earth texture--silt loam, sandy loam
Clay content--4 to 7 percent
Gravel content--5 to 10 percent
Reaction (pH)--5.9 to 7.0
Thickness--5 to 14 cm
2CA horizon
Hue--2.5Y or 5Y moist or dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--2 to 6 moist or dry
Fine-earth texture--coarse sandy loam, sandy loam, loamy sand
Clay content--3 to 4 percent
Sand content--58 to 75 percent
Gravel content--27 to 60 percent
Reaction (pH)--5.9 to 7.1
Thickness--11 to 25 cm
2C1horizon
Hue--2.5Y or 5Y moist or dry, variegated
Value--4 to 6 moist, 6 to 7 dry
Chroma--2 to 6 moist or dry
Fine-earth texture--coarse sand, sand, loamy sand
Clay content--1 to 2 percent
Sand content--86 to 95 percent
Gravel content--60 to 85 percent
Reaction (pH)--7.9 to 8.1
Thickness--20 to 50 cm
2C2 horizon
Hue--10YR or 2.5Y moist or dry, variegated
Value--3 or 4 moist, 5 or 6 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--coarse sand, sand, loamy coarse sand
Clay content--1 to 2 percent
Sand content--86 to 99 percent
Gravel content--60 to 85 percent
Reaction (pH)--7.6 to 8.3
Thickness--75 to 100 cm
COMPETING SERIES:
Bearisland--calcareous throughout; no lithologic discontinuity
Chena--high amount of mica throughout
Eklutna,
Ekuk--dry in some parts of soil moisture control section more than 45 consecutive days in June through October; pH of 6.1 to 7.3
Lituya--O horizon consisting of herbaceous litter; derived from marine deposits; no free carbonates
Muirpoint--derived from glaciofluvial sediment; extremely gravelly in lower part
Nataga--dry in some parts of soil moisture control section more than 45 consecutive days in June through October; pH of 6.1 to 7.3; more than 15 percent cobbles in C horizon
Nizina--dry in some parts of soil moisture control section more than 45 consecutive days in June through October; subject to flooding
GEOGRAPHIC SETTING:
Elevation--0 to 200 m
Climate--cool, moist summers; mild, wet winters
Mean annual precipitation--2180 to 6360 mm
Mean annual air temperature--1 to 8 degrees C
Frost-free period--90 to 154 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Ashmun--saturation and aquic conditions throughout; in depressions of adjacent landforms
Kaknau--50 to 100 cm (moderately deep) to a lithic contact; on adjacent hillslopes
Puffin--frequent flooding; on adjacent outwash deltas
Tidalwave--redoximorphic features within 25 cm of soil surface; on similar landforms
Vivid--saturation and aquic conditions within 25 cm of soil surface; on adjacent landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Depth to saturation in normal years--more than 150 cm year round
Saturated hydraulic conductivity (Ksat)--very high throughout
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential natural vegetation--bigleaf lupine, bluejoint, splendid feather moss, beach strawberry, marsh grass of Parnassus, balsam poplar, knights plume moss, gooseneck moss, Barclay's willow, undergreen willow, false mountain willow, Sitka spruce, liverleaf wintergreen
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
*Lithologic discontinuity--zone from 11 to 150 cm
*Free carbonates--zone from 24 to 150 cm
*Particle-size control section--zone from 27 to 102 cm
National Cooperative Soil Survey
U.S.A.