LOCATION GRAYSLAKE ID
Tentative Series
BAG/GAH/EMM
02/2014
GRAYSLAKE SERIES
The Grayslake series consists of very deep, very poorly drained organic soils that formed in organic material of water-tolerant plants. Grayslake soils are in bogs of mountain basins. Slopes are 0 to 1 percent. The mean annual precipitation is about 500 millimeters and the mean annual temperature is about 2.2 degrees C.
TAXONOMIC CLASS: Euic Typic Cryohemists
TYPICAL PEDON: Grayslake peat - on a 0 percent slope. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 17 cm; very dark brown (10YR 2/2) peat; rubbed and pressed fibric material; about 100 percent unrubbed fibers, 85 percent rubbed; many very fine, fine, medium, and coarse roots; slightly alkaline (pH 7.5); gradual smooth boundary. (13 to 25 cm thick)
Oe1--17 to 52 cm; very dark brown (10YR 2/2) mucky peat; rubbed and pressed hemic material; about 85 percent unrubbed fibers; 25 percent rubbed; many very fine, fine, and common medium roots; slightly alkaline (pH 7.7); clear wavy boundary.
Oe2--52 to 81 cm; black (10YR 2/1) mucky peat; rubbed and pressed hemic material; about 60 percent unrubbed fibers, 20 percent rubbed; many very fine and common fine roots; very slightly effervescent; neutral (pH 7.2); clear smooth boundary.
Oe3--81 to 140 cm; black (10YR 2/1) mucky peat; rubbed and pressed hemic material; about 50 percent unrubbed fibers, 10 percent rubbed; many very fine and common fine roots; slightly effervescent; neutral (pH 7.2); clear smooth boundary. (Combined thickness of the Oe horizons is 85 to 125 cm thick)
Oa--140 to 165 cm; very dark brown (10YR 2/2) muck; rubbed and pressed sapric material; about 25 percent unrubbed fibers, 0 percent rubbed; many very fine roots; slightly effervescent; slightly alkaline (pH 7.5).
TYPE LOCATION: Bonneville County, Idaho; about 6.5 kilometers northwest of the Grays Lake Guard Station and 350 meters south of the west end of Bear Island. About 670 meters east and 110 meters south of the northwest corner of section 20, T.4 S., R.43 E.; Bear Island, USGS topographic quadrangle; latitude 43 degrees 03 minutes 45.53 seconds north and longitude 111 degrees 26 minutes 38.68 seconds west, NAD 83.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature: 1.7 to 3.9 degrees C.
Depth to sapric material: 100 to 140 cm.
Depth to apparent water table: saturated year round
Surface tier
Chroma - 1 or 2 moist
Texture - peat or mucky peat
Fibric fiber content (Oi horizon) - 80 to 100 percent unrubbed and 70 to 90 percent rubbed
Hemic fiber content (Oe horizon) - 70 to 90 percent unrubbed and 20 to 40 percent rubbed
Reaction - 6.6 to 7.8
Subsurface tier
Value - 2 or 3 moist
Chroma - 1 or 2 moist
Fiber content - 45 to 85 percent unrubbed and 10 to 35 percent rubbed hemic material
Reaction - 6.2 to 7.8
Oa horizon
Value - 2 to 4 moist
Chroma - 1 or 2 moist
Fiber content - 15 to 35 percent unrubbed and 0 to 15 percent rubbed sapric material
Reaction - 6.5 to 7.8
COMPETING SERIES:
Koyuktolik - have a reaction class of 6.0 or less
Mariel - have a reaction class of 6.0 or less
Wocus - have limnic diatomaceous material at 140 cm or more
GEOGRAPHIC SETTING:
Landscape - Mountain basin
Landform - Bogs
Elevation - 1942 to 1950 meters
Slope - 0 to 1 percent
Parent material - Organic material from moss and herbaceous water-tolerant plants
Mean annual air temperature - 0.6 to 3.3 degrees C.
Mean annual precipitation - 450 to 550 millimeters
Frost free period - 30 to 65 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Sibbett - have an argillic horizon.
Outlet - have a calcic horizon at 25 to 40 cm.
Tepete - have a mineral layer at 41 to 114 cm.
The Sibbett and
Outlet soils occupy higher positions of the same landform;
Tepete soils occupy positions adjacent to Grayslake.
DRAINAGE AND PERMEABILITY:
Drainage class: Very poorly
Saturated hydraulic conductivity: Moderately high
Ponding: 50 to 90 cm April to July. 0 to 50 cm remaining months
USE AND VEGETATION:
Major uses: Watershed and wildlife habitat
Vegetation: Moss, rushes and sedges
DISTRIBUTION AND EXTENT: Southeastern, Idaho; MLRA 44B. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Bonneville County, Idaho, 2014. The series is named for Grayslake.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Surface tier - Fibric and hemic material from the surface to 30 cm.
Subsurface tier - Hemic material from 30 to 90 cm.
Bottom tier - Hemic and sapric material from 90 to 130 cm.
Euic reaction class - pH of undried samples is greater than 4.5 from the surface to 165 cm.
National Cooperative Soil Survey
U.S.A.