LOCATION GATEVIEW COEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Pachic Haplocryolls
TYPICAL PEDON: Gateview gravelly loam - grassland. (Colors are for dry soil unless otherwise noted).
A1--0 to 10 inches; dark grayish brown (10YR 4/2) gravelly loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; soft, very friable, slightly sticky, slightly plastic; 15 percent pebbles and 5 percent cobble; neutral; clear smooth boundary. (6 to 14 inches thick)
A2--10 to 22 inches; grayish brown (10YR 5/2) very gravelly sandy loam, very dark brown (10YR 2/2) moist; weak medium subangular blocky structure parting to fine granular; slightly hard, very friable; 50 percent pebbles and 5 percent cobbles; neutral; gradual smooth boundary. (10 to 16 inches thick)
C--22 to 60 inches; brown (10YR 5/3) very gravelly sandy loam, dark brown (10YR 4/3) moist; massive; slightly hard, very friable; 50 percent pebbles and 5 percent cobble; neutral. (Several feet thick)
TYPE LOCATION: Gunnison County, Colorado; two miles south of Crested Butte, Colorado, in Sec. 12, T. 14 S., R. 85 W.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature: The mean annual soil temperature is 40 degrees F.
Mean summer soil temperature: about 47 degrees F.
Thickness of mollic epipedon: 16 to 40 inches
Depth to calcareous material: greater than 40 inches
Base saturation: 60 to 100 percent, but typically 90 percent
Particle-size control section (weighted average): sandy loam or loam
Clay content: 5 to 18 percent
Sand content: greater than 35 percent fine or coarser
Rock fragments: 35 to 80 percent, mainly 1/2 to 3 inches in diameter, but includes fragments up to and including boulders
A horizon:
Hue: 2.5Y through 7.5YR
Value: 3 through 5 dry, 2 or 3 moist
Chroma: 1 through 3
Reaction: moderately acid to slightly alkaline
C horizon:
Hue: 2.5Y through 7.5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 2 through 4
Texture: loam, sandy loam or fine sandy loam with rock fragment modifiers
Reaction: moderately acid to slightly alkaline
COMPETING SERIES:
Baconcamp: lithic contact at 20 to 40 inches
Beehunt: greater than 18 percent clay in the control section
Behanco: lithic contact at 40 to 60 inches
Behanin: has cambic horizon
Busterback: sandy-skeletal in lower part of the control section
Croesus: lithic contact at 20 to 40 inches
Dressel: greater than 18 percent clay in the control section
Hapgood: greater than 18 percent clay in the control section
Hobacker: has secondary carbonates
Lionhead: has Bw horizon
Lolon: lithologic discontinuity
Marcetta: greater than 18 percent clay in the control section
Namela: lithic contact at 20 to 40 inches
Papaspila: greater than 18 percent clay in the control section
Parkcity: differentiation not clear
Poleline: has cambic horizon
Povey: has cambic horizon
Tonigut: paralithic contact at 40 to 60 inches
Warshod: paralithic contact at 40 to 60 inches
GEOGRAPHIC SETTING: Parent material: alluvium or colluvium from sedimentary rocks and glacial materials
Landform: outwash terraces, alluvial fans, till plains, hillslopes, kames, and eskers
Slopes: 2 to 45 percent
Elevation: 7,600 to 10,000 feet
Mean annual temperature: 34 to 40 degrees F
Mean summer temperature: 58 degrees F
Mean annual precipitation: 18 to 33 inches
Precipitation pattern: peak periods during winter and least amounts in May and June
Frost-free period: 40 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Tine and Pierian soils. Both have mollic epipedons less than 16 inches thick and have sandy-skeletal lower sections.
DRAINAGE AND PERMEABILITY: Well to somewhat excessively drained; slow runoff; rapid permeability.
USE AND VEGETATION: These soils are used mainly as native pastureland; however, they may be irrigated to hay crops in places. Principal native vegetation is Thurber fescue, big sage, native bluegrass and scattered aspen.
DISTRIBUTION AND EXTENT: Mountain valleys of central and western Colorado. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Piedra Area, Colorado, 1974.
REMARKS: Diagnostic features:
Mollic epipedon: The zone from 0 to 22 inches. (A horizons)
Last updated by the state 5/00.