LOCATION MARYSSLOUGH AK
Established Series
MPS/SAS
05/2022
MARYSSLOUGH SERIES
Landscape--shore complexes
Landform--floodplains, leeward side of coastal berms
Slope--0 to 5 percent
Parent material--loamy alluvium over sandy and gravelly alluvium
Mean annual precipitation--about 295 mm
Mean annual air temperature--about -3 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 Fluventic Haplocryepts
TYPICAL PEDON: Marysslough silt loam on a west southwest facing linear, convex floodplains, on a slope of 3 percent at an elevation of 4 m (The soil was moist throughout the profile when described on July 12, 2015.)
Oi--0 to 12 cm; slightly decomposed plant material, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; many very fine and medium, common fine, and very few coarse roots throughout; slightly acid (pH 6.4); abrupt smooth boundary
A--12 to 23 cm; silt loam,85 percent gray (10YR 5/1) and 15 percent dark grayish brown (10YR 4/2) dry, 85 percent very dark gray (10YR 3/1) and 15 percent very dark brown (10YR 2/2) moist; moderate fine granular structure; friable, slightly sticky, nonplastic; moderately few very fine, many fine and medium, and very few coarse roots throughout; 7 percent channers; slightly acid (pH 6.3); clear smooth boundary
BC--23 to 35 cm; channery silt loam,60 percent pale brown (10YR 6/3) and 40 percent pale yellow (2.5Y7/3) dry, 60 percent brown (10YR 4/3) and 40 percent light olive brown (2.5Y 5/3) moist; moderate medium subangular blocky structure; friable, slightly sticky, nonplastic; moderately few very fine, many fine, and very few coarse roots throughout; few fine irregular pores; 20 percent channers; slightly acid (pH 6.2); abrupt wavy boundary
2C--35 to 150 cm; extremely channery coarse sand, olive gray (5Y 5/2) dry, dark olive gray (5Y 3/2) moist; structureless, single grain; loose, nonsticky, nonplastic; very few very fine and moderately few fine roots top of horizon; 68 percent channers; slightly acid (pH 6.3)
TYPE LOCATION: Nome Census Area, Alaska, latitude 63.8998150 longitude -160.8048040 degrees, datum WGS84 (Coordinates determined with a GPS unit)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--0 to 3 degrees C
Soil moisture control section--dry less than 45 consecutive days in June through October
Thickness of ochric epipedon--7 to 25 cm
Thickness of cambic horizon--15 to 30 cm
Particle Size Control Section:
*Clay--0 to 8 percent
*Total fragments--60 to 75 percent channers
Oi horizon
Thickness--5 to 15 cm
A horizon
Value--2 or 3 moist, 4 or 5 dry
Chroma-1 or 2
Clay--3 to 10 percent
Sand--20 to 45 percent
Organic carbon--5 to 12 percent
Total rock fragment content--0 to 10 percent channers
Reaction--5.1 to 6.3
Thickness--5 to 15 cm
BC horizon
Hue--7.5YR, 10YR, or 2.5Y
Value--2 to 5 moist, 4 or 7 dry
Chroma--2 to 6
Fine-earth texture--silt loam, sandy loam
Clay--3 to 10 percent
Sand--20 to 65 percent
Organic carbon--2 to 5 percent
Total rock fragment content--15 to 40 percent channers
Reaction--5.6 to 6.3
Thickness--5 to 20 cm
2C horizon
Hue--10YR, 2.5Y or 5Y
Value--2 or 3 moist, 4 or 5 dry
Chroma--1 to 3
Fine-earth texture--coarse sand, loamy coarse sand, sand
Clay--0 to 3 percent
Sand--80 to 100 percent
Organic carbon--0.5 to 2 percent
Total rock fragment content--60 to 75 percent channers
Reaction--5.6 to 6.6
COMPETING SERIES: none
GEOGRAPHIC SETTING:
*Elevation--0 to 8 m
*Climate--warm, moist summers; cold, dry winters
*Mean annual precipitation--295 to 300 mm
*Mean annual air temperature-- -5 to -1 degrees C
*Frost-free period--55 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
*
Grassylake--excessively drained, no cambic horizon, herbaceous organic material over gravelly beach sand; berms on coastal plains
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--well drained
*Flooding--occasional, brief
*Saturation during normal years--none
*Saturated hydraulic conductivity (Ksat)--very high in the surface organic layer and the substratum, high to moderately high throughout the rest of the profile
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--Pacific hemlockparsley, arctic daisy, mouse-ear chickweed, Alaska bog willow, black crowberry, lakeshore sedge, Port clarence Indian paintbrush, beach pea, saw-wort, cup lichen, lyngbye's sedge, smallawned sedge, bluegrass, moss, Scottish licorice-root, circumpolar reedgrass, American dunegrass, beachhead iris, narcissus anemone, red fruit bearberry, dwarf birch, bluejoint, arctic daisy, greygreen reindeer lichen, marsh Labrador tea, common woodrush, whorled lousewort, alpine bistort, bog blueberry, graminoid
DISTRIBUTION AND EXTENT: Nulato Hills-Southern Seward Peninsula Highlands, Alaska; MLRA 240; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA
SERIES ESTABLISHED: Nulato Hills BLM area, Nome Census Area, Alaska; 2021
REMARKS:
Diagnostic horizons and features recognized in this pedon
*Particle-size control section--zone from 37 to 112 cm
*Ochric epipedon--zone from 0 to 23 cm
*Cambic horizon--zone from 12 to 35 cm
*Lithological discontinuity-- zone from 35 to 150 cm
National Cooperative Soil Survey
U.S.A.