LOCATION ROGERT CO+UT WYEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Lithic Haplocryolls
TYPICAL PEDON: Rogert very gravelly sandy loam - grassland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 4 inches; dark gray (7.5YR 4/1) very gravelly sandy loam, very dark gray (7.5YR 3/1) moist; strong fine crumb structure; soft, very friable, nonsticky and nonplastic; 40 percent gravel, mostly fine and very fine angular granite gravel; neutral (pH 6.6); clear smooth boundary. (3 to 6 inches thick)
A2--4 to 14 inches; brown (7.5YR 4/2) very gravelly coarse sandy loam, dark brown (7.5YR 3/2) moist; moderate fine granular structure; hard, very friable, nonsticky and nonplastic; 50 percent gravel, mostly fine and very fine angular granite fragments; neutral (pH 6.8); abrupt wavy boundary. (4 to 17 inches thick)
R--14 inches; granite.
TYPE LOCATION: Jackson County, Colorado; 750 feet south and 900 feet west of the east 1/4 corner of Sec. 8, T. 10 N., R. 78 W.
RANGE IN CHARACTERISTICS:
Soil moisture: typic ustic.
Mean annual soil temperature: 36 to 44 degrees F
Mean summer soil temperature: 43 to 58 degrees F
Depth to lithic contact: 8 to 20 inches
Thickness of the mollic epipedon: 5 to 20 inches often extends to the lithic contact
Particle-size control section (weighted average):
Clay content: 5 to 18 percent
Sand content: 45 to 82 percent with more than 35 percent fine or coarser
Rock fragments: 35 to 80 percent and range from 1/8 to 24 inches in diameter, but most are smaller than 1 inch
A horizon:
Hue: 2.5Y through 7.5YR
Value: 3 through 5 dry, 2 or 3 moist
Chroma: 1 through 4
Reaction: slightly acid through slightly alkaline
C horizon (if present):
Hue: 2.5Y through 7.5YR
Texture: sandy loam or coarse sandy loam modified by rock fragments
Reaction: slightly acid to slightly alkaline
COMPETING SERIES:
Arrowpeak (MT),
Dollarhide (ID),
Labshaft (NV),
Milling (WA),
Poin (MT)- continuous Bw horizons
Cheadle (MT),
Starley (WY) - calcareous in some part above the bedrock
Chokecherry (ID) Xeric moisture regime
Clamp (OR),
Irigul (WY),
Irson (WY),
Jonlake (NV),
Schwacheim (CO) - greater than 18 percent clay in the fine earth fraction of the particle-size control section
Dalys (MT) elevation lower than 8,000 feet
Eyre (CO),
Topeki (NV) - coarse fragments consisting mainly of stones more than 10 inches in diameter
Udel (NV) has a xeric moisture distribution pattern and pinyon pine
GEOGRAPHIC SETTING:
Parent material: derived from thin, noncalcareous, very gravelly or channery materials weathered residually from granite, sandstone, gneiss or in places from tuff
Landform: mountain slopes and ridges
Slopes: 3 to 100 percent
Elevation: 7,600 to 10,900 feet
Mean annual temperature: 32 to 43 degrees; southern Colorado 40 to 44 degrees F
Mean annual precipitation: 14 to 25 inches at type location; Utah, 25 to 30 inches at elevations of 9,500 to 11,500 feet, Utah, north mean annual precipitation 12 to 19 inches with elevations of 7,500 to 8,600 feet
Precipitation pattern: in the mountainous area Colorado: peak periods of precipitation in the spring and early summer
Frost-free period: 20 to 30 days, but ranges to 90 days with elevations down to 7,500 feet; Utah: 50 to 80 days in the north, at elevations of 7,500 to 8,600 feet and mean annual precipitation of 12 to 19 inches
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Juget and Supervisor soils. Juget soils have mean summer soil temperature warmer than 59 degrees F. and are coarse textured. Supervisor soils have bedrock at a depth of more than 20 inches.
DRAINAGE AND PERMEABILITY: Well drained; low to very high runoff; moderately rapid to rapid permeability.
USE AND VEGETATION: These soils are used for native pastureland. Native vegetation consists of scattered ponderosa pine, Arizona fescue, mountain muhly, fringed sagebrush, slimstem muhly, blue grama, pine dropseed, sagebrush, junegrass, needleandthread, and wheatgrass.
DISTRIBUTION AND EXTENT: Mountainous areas of Colorado and central and northeastern parts of Utah. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Jackson County, Colorado; 1973.
REMARKS: Diagnostic features include:
Mollic epipedon - the zone from 0 to 14 inches
Lithic contact is at 14 inches.
Taxonomic Version: Ninth Edition, 2003