LOCATION FLOUNDER                AK

Established Series
SAS/TJR/SJN
05/2022

FLOUNDER SERIES

The Flounder series consists of very deep, poorly drained soils formed in colluvium over glacial drift on coastal bluffs. Slopes range from 40 to 70 percent. The mean annual precipitation is about 615 millimeters and the mean annual air temperature is about 0.5 degrees C.

TAXONOMIC CLASS: Coarse-loamy, isotic, acid Typic Cryaquepts

TYPICAL PEDON: Flounder highly organic silt loam, located on a bluff with a slope of 55 percent and elevation of 64 meters; when described on September 19th, 2007 the soil was moist throughout (Colors are for moist soil unless otherwise noted)

Oi--0 to 8 centimeters; slightly decomposed plant material; many very fine and fine roots, many medium roots, and common coarse roots; extremely acid, pH 4.1; clear smooth boundary

A--8 to 21 centimeters; very dark gray (7.5YR 3/1) highly organic silt loam; 25 percent sand; 65 percent silt; 10 percent clay; weak medium granular structure; very friable, nonsticky, nonplastic; common very fine and fine roots, common medium roots, and common coarse roots; extremely acid, pH 4.1; clear wavy boundary

2Cg--21 to 183 centimeters; 85 percent gray (10YR 5/1) gravelly loam; 45 percent sand; 40 percent silt; 15 percent clay; massive; friable, nonsticky, nonplastic; common very fine and fine roots, few medium roots, and few coarse roots; 15 percent medium strong brown (7.5YR 5/6), moist, masses of oxidized iron with sharp boundaries; 25 percent nonflat 2 to 76 millimeter fragments; very strongly acid, pH 4.5

TYPE LOCATION: Dillingham Census Area, Alaska; 1 kilometer east of the Village of Clarks Point; 58.8377778 degrees north latitude and 158.5380556 degrees west longitude.

RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 0.5 to 1.7 degrees C (cryic soil temperature regime)
Soil moisture control section - Soil is wet from 30 to 50 cm for parts of the growing season in most years (aquic soil moisture regime)
Depth to reduced matrix - 21 to 44 cm
Depth to aquic conditions - 21 to 44 cm

All mineral horizons-
Reaction - 4.1 to 5.1

Particle-size control section-
Clay content - 0 to 18 percent
Rock fragments - 12 to 25 percent

Oe horizon
Thickness - 2 to 8 cm

A horizon
Hue - 7.5YR or 2.5Y
Value - 3 or 4
Chroma - 1 or 2
Fine earth texture - Highly organic silt loam or silt loam
Clay content - 5 to 20 percent
Reaction - 4.1 to 4.5
Rock fragments - 0 percent
Thickness - 6 to 42 cm

2Cg horizon
Hue - 10YR to 5Y
Value - 5
Chroma - 1 to 3
Fine earth texture - Loam or sandy loam
Clay content - 0 to 18 percent
Reaction - 4.5 to 5.1
Rock fragments - 12 to 25 percent
Thickness - 139 to 162 cm

COMPETING SERIES: There are no competing series

GEOGRAPHIC SETTING:
Parent material - Organic material over coarse-silty colluvium over gravelly till
Landform - Bluffs
Slope - 40 to 70 percent
Elevation - 8 to 184 meters
Climate - Cool summers; cold winters, August and September are the wettest months
Mean annual precipitation - 612 to 628 mm
Mean annual air temperature - 0.3 to 0.7 degrees C
Frost free duration - 85 to 140 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Rolph - No aquic soil conditions, hills and plains
Kanakanak - No coarse fragments present, rises and talfs on plains
Clarkspoint - No aquic soil conditions, hills and plains
Ungiuk - Formed in alluvium parent material, drainageways on plains

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: (Ksat)
Drainage class - Poorly drained
Saturation in normal years - Within 25 cm of the soil surface during spring and early summer
Flooding - None
Ponding - None
Ksat - Moderately high to high throughout the mineral soil material

USE AND VEGETATION:
Use - Wildlife habitat
Potential natural vegetation - Western maritime scrubland composed of alder, with an understory of grass and ferns

DISTRIBUTION AND EXTENT: Bristol Bay Lowlands; MLRA 236; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA

SERIES ESTABLISHED: Nushagak-Mulchatna Watershed Soil Survey, Dillingham Census Area, Alaska, 2019

REMARKS:
Particle-size control section - 33 to 108 cm
Ochric epipedon
Soil moisture regime - Aquic
Aquic soil conditions and cambic horizon - 2Cg horizon
Reduced matrix - 2Cg horizon

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National Cooperative Soil Survey
U.S.A.