LOCATION HUB                     WY+CO

Tentative Series
Rev. AJC
03/2023

HUB SERIES

The Hub series consists of deep or very deep, well to moderately well drained soils with moderate to slow permeability. These soils formed in thick noncalcareous alluvial fan or slope wash materials derived mainly from sedimentary bedrocks and are on alluvial fans and valley side slopes. Slopes range from 2 to 40 percent. The mean annual precipitation is about 460 mm, and the mean annual air temperature is about 3 degrees C.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive Ustollic Glossocryalfs

TYPICAL PEDON: Hub loam - forestland (Colors are for dry soil unless otherwise noted)

Oi--0 to 3 cm; Undecomposed organic material principally leaves, bark, and twigs.

Oe--3 to 6 cm; Decomposed organic material like that of the above horizon.

A--6 to 21 cm; dark gray (10YR 4/1) loam, black (10YR 2/1) moist; strong fine crumb structure; soft, very friable, slightly plastic, slightly sticky; noncalcareous; neutral (pH 6.8); abrupt smooth boundary. (13 to 25 cm thick)

E--21 to 29 cm; light brownish gray (10YR 6/2) fine sandy loam, grayish brown (10YR 5/2) moist; weak coarse platy structure that parts to moderate very fine subangular blocks; slightly hard, very friable, nonplastic, nonsticky; noncalcareous; neutral (pH 6.8); clear smooth boundary. (8 to 15 cm thick)

E/B--29 to 42 cm; Mixed colors including light brownish gray (10YR 6/2) and grayish brown (10YR 5/2) fine sandy loam, grayish brown (10YR 5/2) moist and dark grayish brown (10YR 4/2) moist; weak coarse subangular blocky structure that parts to medium subangular blocks; slightly hard, very friable, nonplastic, nonsticky; a few thin glossy patches on the more clayey portions of the peds; this horizon consists of seams and nodules of material like that of the underlying horizon embedded in a lighter colored matrix like that of the overlying horizon; noncalcareous; neutral (pH 6.8); gradual wavy boundary. (8 to 25 cm thick)

Bt1--42 to 88 cm; grayish brown (10YR 5/2) fine sandy clay loam, dark grayish brown (10YR 4/2) moist; moderate coarse subangular blocky structure that parts to moderate medium subangular blocks; horizon is slightly hard, very friable, slightly plastic, slightly sticky; peds are hard; there are thin continuous wax-like coatings on ped faces and wax-like coatings and fillings on the inside of root channels and pores; distinct but discontinuous skeletons on ped faces in the upper part of this horizon; noncalcareous; neutral (pH 7.0); gradual wavy boundary.

Bt2--88 to 103 cm; grayish brown (10YR 5/2) fine sandy clay loam, dark grayish brown (10YR 4/2) moist; weak coarse subangular blocky structure; horizon is slightly hard, friable, slightly plastic, slightly sticky; peds are hard; there are a few thin wax-like patches on ped faces and discontinuous wax-like coatings in some root channels; noncalcareous; neutral (pH 7.2); gradual wavy boundary. (20 to 85 cm thick)

C--103 to 159 cm; grayish brown (10YR 5/2) fine sandy clay loam, dark grayish brown (10YR 4/2) moist; massive; slightly hard, friable, slightly plastic, slightly sticky; noncalcareous; neutral (pH 7.2).

TYPE LOCATION: Carbon County, Wyoming SW1/4 SW1/4, sec. 29, 17 N., R. 88W.

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--5 degrees C
Mean summer soil temperature--13 degrees C, if O horizon is absent or is less than 10 cm thick
Base saturation--60 to 100 percent
Depth to base of argillic horizon--45 to 125 cm
Thickness of E/B horizon--8 to 38 cm or more, and must occur above the Bt horizons
Mottling ranges from no mottling to a few faint mottles but if mottled the base chroma of the matrix must be more than 2.
Solum and C horizons should be uniform with only minor amounts of contrasting stratification.
Rock fragment content--0 to 35 percent in a major part of the solum and C horizon above 125 cm and are mainly 10 to 250 mm in diameter
These soils lack continuous subhorizons of visible calcium carbonate accumulation above 150 cm.

A horizon
Hue--5Y to 7.5YR
Value--4 to 5 dry, or 2 to 3 moist
Chroma--1 to 3
Thickness--10 to 23 cm, but is too thin to be a mollic epipedon
Reaction--pH 6.1 to 7.6

E horizon
Hue--5Y to 7.5YR
Value--5 to 8 dry, or 4 to 7 moist
Chroma--1 to 6
Reaction--pH 6.1 to 7.6

Bt horizons
Hue--5Y to 7.5YR
Value--5 to 7 dry, or 4 to 6 moist
Chroma--1 to 6
Reaction--pH 6.1 to 7.6
Texture--sandy clay loam
Clay content--18 to 35 percent
Sand content--40 to 75 percent, with more than 35 percent being fine or coarser sand

C horizon
Hue--5Y to 7.5YR
Reaction--pH 6.1 to 7.6
Texture--sandy loam or sandy clay loam
Clay content--5 to 25 percent
Sand content--40 to 80 percent, exclusive of textures coarser than loamy very fine sand

COMPETING SERIES: Other series in the same subgroup and family include the Beardall, Bramard, Dukon, Fugawee, and Shirat series. The Beardall, Fugawee, and Shirat series all differ in having a lithic contact above 100 cm or immediately below the solum if the solum is thicker than 100 cm. The Bramard series differs in lacking an albic horizon, in lacking any E/B horizons, in having an umbric epipedon, and in being strongly acid in the Bt and C horizon. The Dukon series differs in lacking continuous E horizons, in having coarser textured C horizons above 100 cm and in having developed from sediments weathered from granite and containing a high proportion of medium and coarse angular sand.

GEOGRAPHIC SETTING:
Landform--gently to steeply sloping alluvial fans and valley sideslopes
Elevation--2200 to 2900 meters
Slope--2 to 40 percent, or more
Parent material--thick noncalcareous alluvial fan or slope wash materials derived mainly from sedimentary bedrocks
Mean annual precipitation--460 mm, with peak periods of precipitation occurring in the spring and early summer months or with nearly equal precipitation in all months providing the annual precipitation does not exceed 760 mm
Mean annual air temperature--3 degrees C
Mean summer air temperature--13 degrees C
Frost-free period--30 to 70 days

GEOGRAPHICALLY ASSOCIATED SOILS: None listed.

DRAINAGE AND PERMEABILITY: Well to moderately well drained. Runoff is medium to slow. Permeability is moderate to slow.

USE AND VEGETATION: They are used as native pastureland, for forestry, and for recreation. Native vegetation includes aspen, brush, Columbia needlegrass, mahonia, and scattered conifer.

DISTRIBUTION AND EXTENT: Hub soils are of small extent in northcentral Colorado and southcentral Wyoming.; MLRAs 43B and 48A.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana

SERIES PROPOSED: Sage Creek area, Carbon County, Wyoming, 1972. The series name is coined.

REMARKS: Diagnostic horizons and features recognized in this pedon include:
Albic horizon--21 to 29 cm (E horizon)
Glossic horizon--29 to 42 cm (E/B horizon)
Argillic horizon--42 to 103 cm (Bt1 and Bt2 horizons)
Particle-size control section--42 to 92 cm (all of the Bt1 horizon and part of the Bt2 horizon)

Converted to metric and O horizons were updated to start at zero. Competing series section was not updated. 01/2023

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National Cooperative Soil Survey
U.S.A.