LOCATION GULL POINT MI+WIEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Typic Argiaquolls
TYPICAL PEDON: Gull Point loam, on a one percent east-facing slope in a drainageway in a forested area at an elevation of 280 meters. (Colors are for moist soil unless otherwise stated.)
Oi--0 to 2 centimeters; slightly decomposed plant material; moderately acid.
A1--2 to 18 centimeters; very dark brown (7.5YR 2.5/2) loam, dark brown (7.5YR 3/2) dry; moderate medium granular structure; friable; many very fine to coarse roots; about 1 percent gravel and 1 percent cobbles; moderately acid; clear wavy boundary.
A2--18 to 38 centimeters; dark brown (7.5YR 3/2) loam, brown (7.5YR 4/3) dry; strong coarse granular structure; friable; common very fine to coarse roots; about 1 percent gravel and 1 percent cobbles; moderately acid; clear wavy boundary.
AB1--38 to 71 centimeters; dark brown (7.5YR 3/3) loam, brown (7.5YR 4/3) dry; weak fine prismatic structure parting to strong medium subangular blocky; firm; common very fine to coarse roots between peds; very many continuous faint dark brown (7.5YR 3/2) clay films on faces of peds; about 1 percent gravel and 1 percent cobbles; moderately acid; clear wavy boundary.
AB2--71 to 84 centimeters; black (5YR 2.5/1) and very dark gray (5YR 3/1) clay loam, brown (7.5YR 4/2) dry; moderate coarse prismatic structure; extremely firm; common very fine to medium roots between peds; many continuous faint very dark gray (10YR 3/1) clay films on faces of peds; very few medium prominent yellowish red (5YR 4/6) masses of iron accumulation; about 5 percent gravel and 1 percent cobbles; slightly acid; broken wavy boundary.
2Bt--84 to 102 centimeters; reddish brown (2.5YR 4/4) loam; weak coarse prismatic structure; very firm; few fine and medium roots between peds; few patchy faint reddish brown (2.5YR 4/3) clay films on faces of peds; few medium prominent yellowish red (5YR 5/8) masses of iron accumulation; few fine prominent reddish gray (5YR 5/2) iron depletions; about 5 percent gravel and 2 percent cobbles; slightly alkaline; gradual wavy boundary.
2BCd1--102 to 155 centimeters; reddish brown (2.5YR 4/3) silt loam; weak very coarse prismatic structure; very firm; few medium roots between peds; few patchy faint reddish brown (2.5YR 4/3) clay films on vertical faces of peds; few discontinuous prominent brown (10YR 5/3) silt flows on vertical faces of peds; about 5 percent gravel and 3 percent cobbles; slight effervescence; moderately alkaline; diffuse smooth boundary.
2BCd2--155 to 203 centimeters; reddish brown (2.5YR 4/3) silt loam; weak coarse prismatic structure; very firm; few patchy faint reddish brown (2.5YR 4/3) clay films on vertical faces of peds; few discontinuous prominent brown (10YR 5/3) silt flows on vertical faces of peds; about 5 percent gravel and 3 percent cobbles; slight effervescence; strongly alkaline.
TYPE LOCATION: Major Land Resource Area (MLRA 92) Superior Lake Plain, Ontonagon County Michigan Subset; about 3.5 miles southeast of the village of White Pine; 830 feet east and 120 feet south of the northwest corner of Section 13, T50N, R42W, USGS White Pine, MI, topographic quadrangle, lat. 46 degrees 44 minutes 10 seconds N. and long. 89 degrees 30 minutes 30 seconds W., NAD 1927
RANGE IN CHARACTERISTICS:
Thickness of the alluvium (depth to the till) - 38 to 102 centimeters
Depth to carbonates - 76 to greater than 152 centimeters
Depth to the base of the argillic horizon - 76 to more than 152 centimeters
Depth to densic layer - 102 to 152 centimeters
Clay content (particle-size control section) - 18 to 32 percent
Fine sand or coarser (particle-size control section) - 15 to 30 percent
Gravel content - 0 to 5 percent throughout
Cobble content - 0 to 5 percent throughout
Reaction (alluvium A and AB horizons) - moderately acid to neutral
Reaction (till 2Bt and 2BCd horizons) - neutral to strongly alkaline
A horizon
Hue: 5YR or 7.5YR
Value: 2 to 3
Chroma: 1 or 2
Texture: loam or silt loam
AB horizon
Hue: 5YR or 7.5YR
Value: 2.5 or 3
Chroma: 1 to 3
Texture: loam, silt loam or clay loam
2Bt horizon
Hue: 2.5YR or 5YR
Value: 4 or 5
Texture: loam or silt loam
2BCd horizon
Hue: 2.5YR or 5YR
Value: 3 to 5
Chroma: 3 or 4
Texture: silt loam or loam
2C horizon (when present)
Hue: 2.5YR or 5YR
Value: 3 to 5
Chroma: 3 or 4
Texture: loam or silt loam
COMPETING SERIES: These are the
Alamosa,
Brandsvold,
Friberg, and
Smiley soils.
Alamosa - did not form in alluvium over till, have 10YR or 7.5YR hues in the matrix of the Bt horizon, and have stratified C horizons.
Brandsvold - has hues of 10YR, 2.5Y, and 5Y in the Bt and C horizons, and 45 to 65 percent fine sand or coarser in the argillic horizon.
Friberg - has hues of 2.5Y and 5Y in the Bt and C horizons, and more than 35 percent fine sand or coarser in the particle size control section.
Smiley - has hues of 2.5Y or 5Y in the Bt and C horizons and carbonates at 25 to 66 centimeters.
GEOGRAPHIC SETTING:
Parent materials - recent loamy alluvium over loamy basal till derived from siltstone and sandstone bedrock
Landforms - drainageways and fluted depressions
Slope - 0 to 2 percent
Mean annual precipitation - 790 to 860 millimeters
Mean annual air temperature ranges from 4 to 7 degrees C.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Big Iron,
Flintsteel,
Trap Falls, and
Watton series.
Members of the typical drainage sequence (catena) include Watton, Flintsteel, and Big Iron.
Big Iron are on higher landscape positions, do not flood, and are in the Aquic Glossudalfs Subgroup
Flintsteel - are on higher or steeper landscape positions and in the Oxyaquic Glossudalfs Subgroup
Trap Falls - are in depressions, do not flood, and are in the Aeric Epiaquepts Subgroup
Watton - are on higher or steeper landscape positions and in the Haplic Glossudalfs Subgroup.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage - a perched seasonal zone of water saturation exists from 0 to 30 centimeters from November to July (poorly drained).
Surface runoff - low to very low
Saturated hydraulic conductivity (A and AB horizons) moderate
Saturated hydraulic conductivity (2Bt horizon) - slow
Saturated hydraulic conductivity (2BCd horizon) very slow
Flooding frequency greater than 50 times in 100 years (frequent); November to July
Flooding duration 7 to less than 30 days (long); November to July
USE AND VEGETATION: Most areas are forested. The major species are sugar maple, red maple, green ash, black ash, white spruce, speckled alder, willow, quaking aspen, yellow birch and balsam fir.
DISTRIBUTION AND EXTENT:
Physiographic Division
--Laurentian Upland
Physiographic Province
--Superior Upland
Land Resource Region
--Northern Lake States Forest and Forage region (LRR K)
Major Land Resource Areas
--Superior Lake Plain (MLRA 92)
--Superior Stony and Rocky Loamy Plains and Hills, Eastern Part (MLRA 93B)
The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Major Land Resource Area 92 Superior Lake Plain; Ontonagon County Michigan Subset, January 2007. Proposed in Ontonagon County, Michigan, 2000. The source of the name is a point of land on the shore of Lake Superior in Ontonagon County.
REMARKS: Diagnostic horizons and features in the typical pedon include:
Mollic epipedon 2 to 84 centimeters (A and AB horizons).
Argillic horizon - 84 to 102 centimeters (2Bt horizon).
Aquic feature - redox depletions with chroma of 2 (2Bt horizon) and saturation to the soil surface.
Densic layer contact - 102 centimeters
ADDITIONAL DATA: Refer to User Pedon ID 98MI131001 for Primary Characterization Data from National Soil Survey Laboratory, Lincoln, NE.