LOCATION SHAGCOVE AK
Established Series
IRD. NDP/SCD
02/2022
SHAGCOVE SERIES
Landscape--mountain valleys
Landform--depressions of valley trains
Slope--1 to 2 percent
Parent material--outwash
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 Aquic Cryorthents
TYPICAL PEDON: Shagcove cobbly fine sandy loam on a graminoid-covered depression of a valley train, on a slope of 2 percent at an elevation of 39 m (When described on July 25, 2013, the soil was moist from the surface to a depth of 49 cm and wet from a depth of 49 to 150 cm.)
Oi--0 to 3 cm; slightly decomposed plant material; moderately acid (pH 6.0); abrupt smooth boundary
A--3 to 7 cm; cobbly fine sandy loam, dark gray (10YR 4/1) dry, black (10YR 2/1) moist; moderate medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine, fine, medium, and coarse and common very coarse roots throughout; 15 percent rounded gravel and 15 percent rounded cobbles; noneffervescent; neutral (pH 6.8); abrupt smooth boundary
C1--7 to 49 cm; very cobbly loamy coarse sand, very pale brown (10YR 7/4) dry, yellowish brown (10YR 5/4) moist; massive; soft, very friable, nonsticky and nonplastic; common very fine, fine, medium, and coarse roots throughout; 20 percent rounded gravel and 15 percent rounded cobbles; noneffervescent; moderately alkaline (pH 7.9); clear smooth boundary
C2--49 to 60 cm; very cobbly loamy coarse sand, very pale brown (10YR 7/4) dry, yellowish brown (10YR 5/4) moist; massive; soft, very friable, nonsticky and nonplastic; common very fine, fine, medium, and coarse roots throughout; 20 percent masses of reduced iron, medium gray (5Y 5/1) moist; 20 percent rounded gravel and 15 percent rounded cobbles; noneffervescent; moderately alkaline (pH 7.9); clear smooth boundary
Cg--60 to 150 cm; very gravelly loamy fine sand, light gray (5Y 7/1) dry, gray (5Y 5/1) moist; massive; soft, very friable, nonsticky and nonplastic; 40 percent rounded gravel and 15 percent rounded cobbles; very slightly effervescent; moderately alkaline (pH 7.9)
TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; Hoonah-Angoon Census Area; latitude 58.4037371, longitude -136.7884268, 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 redoximorphic features--25 to 50 cm
Particle-size control section
*Clay content--0 to 7 percent
*Total rock fragment content--35 to 75 percent
Oi horizon
Thickness--0 to 8 cm
A horizon
Value--2 to 4 moist, 4 to 6 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--fine sandy loam, sandy loam
Clay content--5 to 9 percent
Total rock fragment content--15 to 35 percent
Gravel content--5 to 20 percent
Cobble content--10 to 20 percent
Reaction (pH)--6.0 to 7.4
Thickness--2 to 12 cm
C horizon
Hue--10YR or 2.5Y moist or dry
Value--4 or 5 moist, 6 or 7 dry
Chroma--3 or 4 moist or dry
Fine-earth texture--loamy coarse sand, loamy sand
Clay content--3 to 7 percent
Sand content--75 to 80 percent
Total rock fragment content--35 to 55 percent
Gravel content--15 to 35 percent
Cobble content--15 to 20 percent
Reaction (pH)--7.0 to 8.0
Effervescence--noneffervescent, very slightly effervescent
Thickness--10 to 90 cm
Cg horizon
Hue--10YR to 5Y moist or dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 or 2 moist or dry
Fine-earth texture--loamy fine sand, loamy sand, sand
Clay content--0 to 5 percent
Sand content--78 to 87 percent
Total rock fragment content--35 to 65 percent
Gravel content--25 to 55 percent
Cobble content--10 to 25 percent
Reaction--7.4 to 8.4 (pH)
Effervescence--very slightly effervescent, slightly effervescent
Thickness--50 to 110 cm
COMPETING SERIES:
Sitakaday--aquic conditions within 25 cm of soil surface (very poorly drained); influenced by tides twice daily
GEOGRAPHIC SETTING:
Elevation--0 to 70 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:
Puffin--no aquic conditions within a depth of 150 cm (well drained); on adjacent flood plains
Tyeen--no aquic conditions within a depth of 150 cm (well drained); on adjacent landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat poorly drained
Depth to saturation in normal years--more than 25 cm
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high in A horizon, very high in C and Cg horizons
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--Sitka alder, water sedge, bluejoint, sedge, field horsetail, marsh horsetail, variegated scouringrush, splendid feather moss, heartleaf twayblade, common woodrush, Sitka spruce, Schreber's big red stem moss, goose neck moss, undergreen willow, western hemlock, oval-leaf blueberry
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 recognized in this pedon
*Ochric epipedon
*Aquic conditions--zone from 49 to 150 cm
*Redoximorphic depletions that have chroma of 2 or less--zone from 49 to 60 cm
*Reduced matrix--zone from 60 to 150 cm
*Free carbonates--zone from 60 to 150 cm
*Particle-size control section--zone from 28 to 103 cm
National Cooperative Soil Survey
U.S.A.