LOCATION MINYA                   AK

Established Series
Rev. MHC/DLM
05/2022

MINYA SERIES

Depth class: shallow
Drainage class: well drained
Landforms: mountains
Parent material: silty eolian deposits over colluvium and/or gravelly till
Elevation: 2,546 to 5,295 feet (776 to 1,614 m)
Slope: 2 to 65 percent
Annual precipitation: 25 to 52 inches (623 to 1,310 mm)
Annual temperature: 25 degrees F (-4 degrees C)
Frost-free period: 50 to 70 days

TAXONOMIC CLASS:

TYPICAL PEDON: Minya silt loam - on a slope of 8 percent under white mountain avens-mixed ericaceous shrub dwarf alpine scrub. (All colors are for moist soil)

Oi--0 to 1 inches (0 to 3 cm); very dusky red (2.5YR 2.5/2) slightly decomposed plant material; many very fine and fine and few medium roots; extremely acid (pH 4.0); clear smooth boundary.

A--1 to 2 inches (3 to 5 cm); very dark brown (10YR 2/2) silt loam; weak thin platy structure; very friable, nonsticky and nonplastic; many very fine and fine and few medium roots; extremely acid (pH 4.2); clear wavy boundary.

E--2 to 3 inches (5 to 8 cm); dark grayish brown (10YR 4/2) silt loam; weak fine subangular blocky structure; very friable, nonsticky and nonplastic; common very fine and fine roots; 2 percent gravel; very strongly acid (pH 4.8); abrupt irregular boundary.

2Bs--3 to 8 inches (8 to 20 cm); strong brown (7.5YR 4/6) very cobbley loam; moderate very fine granular structure; friable, nonsticky and nonplastic; few very fine and fine roots; 20 percent gravel, 15 percent cobbles, 2 percent stones; strongly acid (pH 5.4); gradual wavy boundary.

2BC--8 to 17 inches (20 to 43 cm); dark yellowish brown (10YR 4/6) very cobbly loam; massive; friable, nonsticky and nonplastic; few very fine and fine roots; 10 percent gravel, 25 percent cobbles, 2 percent stones; strongly acid (pH 5.4); abrupt wavy boundary.

2R--17 to 60 inches (43 to 152 cm); fractured bedrock.

TYPE LOCATION: Delta River Area, Alaska; approximately one-half mile east of Upper Tangle Lake; UTM coordinates: Zone 6, Easting 548413, Northing 6989062.

RANGE IN CHARACTERISTICS:

Soil moisture class: udic
Average annual soil temperature: 30 to 28 degrees F (-1 to -2.5 degrees C).
Mean summer soil temperature: 36 to 39 degrees F. (2 to 4 degrees C)
Depth to bedrock (lithic): 10 to 19 inches (25 to 48 cm)
Depth to strongly contrasting textural stratification: 2 to 9 inches (5 to 23 cm)

Oi horizon:
Colorhue of 2.5YR to 10YR; value of 2 to 3; chroma of 1 to 3
Organic matter content65 to 90 percent
Reactionextremely acid

A, E horizon:
Colorchroma of 1 to 3, value of 2 to 4
Texturemucky silt loam; silt loam
Clay content0 to 10 percent
Silt content55 to 75 percent
Sand content15 to 35 percent
Organic matter content4 to 12 percent
Rock fragments0 to 2 percent subangular strongly cemented gravel
Reactionextremely acid to very strongly acid

2Bs horizon:
Colorhue of 5YR or 7.5YR; value of 3 or 4; chroma of 3 to 6
Texture-very cobbly loam, very gravelly sandy loam
Clay content0 to 15 percent
Silt content10 to 45 percent
Sand content45 to 75 percent
Organic matter content4 to 12 percent
Rock fragments2 to 20 percent subangular very strongly cemented gravel; 2 to 35 percent subangular very strongly cemented cobbles, 0 to 10 percent subangular very strongly cemented stones
Reactionvery strongly acid or strongly acid

2BC horizon:
Colorhue of 10YR or 2.5Y; chroma of 4 to 6
Texturevery cobbly loam or very gravelly sandy loam
Clay content5 to 15 percent
Silt content10 to 45 percent
Sand content45 to 75 percent
Organic matter content0 to 1 percent
Rock fragments10 to 30 percent subangular strongly cemented gravel; 2 to 35 percent subangular strongly cemented cobbles; 0 to 10 percent subangular strongly cemented stones
Reactionvery strongly acid to moderately acid

COMPETING SERIES: There are the no competing series in this classification.

GEOGRAPHIC SETTING:
Landforms: mountains
Parent material: silty eolian deposits over colluvium and/or gravelly till
Elevation: 2,546 to 5,295 feet (776 to 1,614 m)
Slope: 2 to 65 percent
Annual precipitation: 25 to 52 inches (623 to 1,310 mm)
Annual temperature: 25 degrees F (-4 degrees C)
Frost-free period: 50 to 70 days

GEOGRAPHICALLY ASSOCIATED SOILS: These include Castnot, Field, Frostcircle, and Ogive soils. Castnot soils are well drained, very deep, and occur on mountains. Field soils are well drained, moderately deep, and occur on mountains. Frostcircle soils are poorly drained very shallow to shallow to permafrost, and occur on mountains. Ogive soils are somewhat poorly drained, very deep, and occur on mountains.

DRAINAGE AND PERMEABILITY: Well drained, medium runoff. Saturated hydraulic conductivity is moderately high to high above the bedrock.

USE AND VEGETATION: Used for wildlife habitat and recreation. Native vegetation is white mountain avens-mixed ericaceous shrub dwarf alpine scrub, shrub birch bog blueberry scrub.

DISTRIBUTION AND EXTENT: MLRA 228, Interior Alaska Mountains, Alaska. The series is of small extent.

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

SERIES ESTABLISHED: Delta River Area, Alaska, 2005

REMARKS: Diagnostic features and horizons recognized in this profile include:
Lithic contact: 17 inches. (2R horizon)
Albic horizon: 2 to 3 inches. (E horizon)
Spodic horizon: 3 to 8 inches. (2Bs horizon)
Lithologic discontinuity: At the upper boundary of E horizon
Loamy-skeletal particle size control section: 10 to 17 inches
Temperature regime: cryic

ADDITIONAL DATA:

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National Cooperative Soil Survey
U.S.A.