LOCATION LOLON MT+WYEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Pachic Haplocryolls
TYPICAL PEDON: Lolon loam - native sod cover. (Colors are for dry soil unless otherwise noted.)
A1--0 to 8 inches; dark grayish brown (10YR 4/2) loam, very dark brown (10YR 2/2) moist; moderate medium and fine crumb structure; slightly hard, friable, nonsticky, nonplastic; many very fine roots and interstitial pores; neutral (pH 7.0); clear boundary.
A2--8 to 17 inches; brown (10YR 5/3) gravelly loam, dark brown (10YR 3/3) moist; dark brown (10YR 4/3) coats on peds, very dark grayish brown (10YR 3/2) moist; weak medium to fine subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; many very fine roots and tubular pores; 25 percent pebbles; neutral (pH 7.0); clear wavy boundary. (A1 horizon is 16 to 24 inches thick.)
C1--17 to 28 inches; brown (10YR 5/3) very gravelly loam, dark grayish brown (10YR 4/2) moist; grayish brown (10YR 5/2) coats on peds, very dark grayish brown (10YR 3/2) moist; massive; soft, very friable, nonsticky, nonplastic; many very fine roots and interstitial pores; 50 percent pebbles; neutral (pH 7.0); gradual irregular boundary. (6 to 16 inches thick)
IIC2--28 to 40 inches; loose sand, gravel and some cobble.
TYPE LOCATION: Granite County, Montana; 440 feet north and 1,320 feet east of SW corner of sec. 24, T.5N., R.16W.
RANGE IN CHARACTERISTICS:
Soil temperature - 34 to 42 degrees F.
Average summer soil temperature - 55 to 58 degrees F.
Mollic epipedon thickness - 17 to 24 inches
Depth to 2C horizon - 20 to 40 inches
More than 50 percent fine sand or coarser in the loamy material.
A horizons - Hue: 10YR or 7.5YR
Value: 3 to 5 dry; 2 or 3 moist
Chroma: 1 to 3
Clay content: 20 to 25 percent
Rock fragments: 0 to 35 percent--0 to 5 percent cobbles; 0 to 25 percent pebbles
Reaction: pH 6.1 to 7.3
C horizon - Hue: 10YR or 7.5YR
Value: 5 or 6 dry; 3 or 4 moist
Chroma: 2 to 4
Clay content: 20 to 25 percent
Rock fragments: 20 to 65 percent--5 to 35 percent cobbles; 15 to 50 percent pebbles
Reaction: pH 6.1 to 7.8
2C horizon: Hue: 10YR or 7.5YR
Clay content: 0 to 5 percent
Rock fragments: 35 to 70 percent--15 to 35 percent cobbles; 20 to 65 percent pebbles
Reaction: pH 6.1 to 7.8
COMPETING SERIES:
Baconcamp - is moderately deep to a lithic contact.
Beehunt - does not have a lithologic discontinuity.
Behanco - is deep to a lithic contact.
Behanin - does not have a lithologic discontinuity.
Busterback - has average summer soil temperature of less than 49 degrees F.
Croesus - is moderately deep to a lithic contact.
Dressel - does not have a lithologic discontinuity.
Gateview - does not have a lithologic discontinuity.
Hapgood - is deep to a lithic contact.
Hobacker - has horizon of secondary carbonate accumulation.
Lionhead - has horizon of secondary carbonate accumulation.
Marcetta - does not have a lithologic discontinuity.
Namela - is moderately deep to a lithic contact.
Papaspila - does not have a lithologic discontinuity.
Parkcity - does not have a lithologic discontinuity.
Poleline - is deep to a lithic contact.
Povey - is deep to a lithic contact.
Tonigut - is deep to a lithic contact.
Warshod - is deep to a paralithic contact.
GEOGRAPHIC SETTING:
Landform - Alluvial fans or moraines.
Elevation - 5200 to 6300 feet.
Slope - 0 to 25 percent
Parent material - alluvium or outwash.
Mean annual precipitation - 15 to 22 inches.
Mean annual temperature - 34 to 39 degrees F.
Frost-free period - 30 to 70 days.
DRAINAGE AND PERMEABILITY: Excessively drained; moderate above the 2C horizon; rapid permeability in the 2C horizon.
USE AND VEGETATION: Used for native range and for hayland. Native vegetation is bluebunch wheatgrass, Idaho fescue and Sandberg bluegrass, with numerous annuals.
DISTRIBUTION AND EXTENT: The Lolon soils are in mountain valleys of western Montana and Wyoming. They are inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Granite County (Philipsburg-Drummond Area), Montana, 1972.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
A mollic epipedon from the soil surface to 17 inches (A horizons); a lithologic discontinuity at 28 inches (2C horizon); a particle-size control section from 10 to 40 inches (A2, C1 and part of the 2C2 horizon). Lolon soils have a cryic temperature regime and an ustic moisture regime.