LOCATION TRUMP COEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Lithic Haplocryolls
TYPICAL PEDON: Trump very gravelly loam. (Colors are for dry soil unless otherwise noted.)
A--0 to 2 inches; grayish brown (10YR 5/2) very gravelly loam, very dark grayish brown (10YR 3/2) moist; weak very fine granular structure; soft, very friable, nonsticky, and nonplastic; many very fine and common fine roots; many fine and very fine pores; 30 percent gravel; 15 percent cobble; slightly alkaline (pH 7.8); gradual wavy boundary.
A2--2 to 9 inches; brown (10YR 5/3) very cobbly loam, dark brown (10YR 3/3) moist; moderate medium and fine subangular blocky structure; slightly hard, friable, nonsticky, and nonplastic; many very fine and common fine roots: common fine and very fine pores; 20 percent gravel, 20 percent cobbles; slightly effervescent; moderately alkaline (pH 8.0); gradual wavy boundary.
Bk--9 to 17 inches; yellowish brown (10YR 5/4) very cobbly loam, dark yellowish brown (10YR 4/4) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky, and nonplastic; few very fine roots; common fine pores; few fine carbonate masses in the matrix; 20 percent gravel, 30 percent cobbles, 5 percent stone; strongly effervescent; moderately alkaline (pH 8.0); abrupt wavy boundary.
R--17 to 27 inches; indurated limestone.
TYPE LOCATION: Chaffee County, Colorado; about 16 kilometers (10 miles) east of Buena Vista; in the NW1/4, NW1/4, section 31, T. 13 S., R. 76 W.; Antero Reservoir USGS quad; lat. 38 degrees 52 minutes 37 seconds N. and long. 105 degrees 56 minutes 02 seconds W. (estimated), NAD 1983.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is usually dry in some part in early summer, moist in some or all parts in late July and August, and intermittently dry in fall; ustic regime.
Mean annual soil temperature: 2.8 to 5.0 degrees C (37 to 41 degrees F)
Mean summer soil temperature: 10.6 to 14.4 degrees C (51 to 58 degrees F)
Depth to lithic contact: 25 to 51 cm to sandstone and limestone (10 to 20 inches)
Depth to secondary calcium carbonate: 23 to 41 cm (9 to 16 inches)
Thickness of the mollic epipedon: 23 to 36 cm (9 to 14 inches)
Lithology of rock fragments: sandstone, limestone
Particle-size control section (weighted averages):
Clay content: 18 to 27 percent
Rock fragment content: 35 to 59 percent
A horizons
Hue: 10YR, 7.5YR
Value: 4 or 5 dry; 3 moist
Chroma: 2 to 4 dry; 2 or 3 moist
Texture: very cobbly loam, very gravelly loam
Clay content: 18 to 27 percent
Rock fragment content, total: 35 to 59 percent
Gravel content: 15 to 35 percent, indurated
Cobble content: 5 to 25 percent, indurated
Calcium carbonate equivalent: 0 to 5 percent
Reaction: neutral to moderately alkaline (pH 6.6 to 8.4)
Organic matter content: 1.0 to 4.0 percent
Bk horizon
Hue: 10YR, 7.5YR
Value: 5 to 7 dry; 4 to 6 moist
Chroma: 3 or 4 dry; 3 or 4 moist
Texture: very cobbly loam, very gravelly loam
Clay content: 18 to 27 percent
Rock fragment content, total: 35 to 59 percent
Gravel content: 15 to 24 percent, indurated
Cobble content: 15 to 30 percent, indurated
Stone content: 0 to 5 percent, indurated
Calcium carbonate equivalent: 3 to 5 percent
COMPETING SERIES: These are the
Arrowpeak,
Betemer,
Cheadle,
Chokecherry,
Clamp,
Dalys,
Dollarhide,
Eyre,
Irigul,
Irson,
Jonlake,
Labshaft,
Mccadden,
Milling,
Poin,
Rogert,
Schwacheim,
Starley,
Topeki, and
Udel series.
Arrowpeak, Mccadden, and Milling have a udic moisture regime.
Cheadle and Starley have an ustic moisture regime bordering udic.
Chokecherry, Clamp, Dollarhide, Jonlake, Labshaft, Topeki, and Udel have a xeric moisture regime.
Betemer, Dalys, Eyre, Irigul, Irson, Poin, Rogert, Schwacheim do not have secondary calcium carbonates.
GEOGRAPHIC SETTING:
Parent material: slope alluvium derived from Pennsylvanian age sandstone and limestone, commonly associated with the Belden and Minturn Formations
Landform: mountains and hills
Slopes: 5 to 25 percent
Elevation: 2743 to 2865 meters (9000 to 9400 feet)
Mean annual temperature: 1.7 to 3.9 degrees C (35 to 39 degrees F)
Mean annual precipitation: 356 to 432 mm (11 to 15 inches)
Precipitation pattern: Monthly precipitation is lowest in winter and greatest in July and August.
Frost-free period: 50 to 80 days.
GEOGRAPHICALLY ASSOCIATED SOILS: This is the Gebson soil. Gebson soils are very deep and are on pediments and foot slopes of hills.
DRAINAGE AND PERMEABILITY: well drained, moderate permeability.
USE AND VEGETATION: These soils are used for livestock grazing and wildlife habitat. Native vegetation consists mainly of Arizona fescue, mountain muhly, needlegrass, prairie Junegrass, western wheatgrass, and mountain mahogany with widely spaced bristlecone pine and ponderosa pine.
DISTRIBUTION AND EXTENT: Central Colorado; LRR E, MLRA 48A; small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Park County, Colorado, Teller-Park soil survey area, Colorado, 2010. This pedon is in the adjacent Pike and San Isabel NF, Northern Part soil survey area, and is the typical pedon of the Cheadle Family in that survey. The Trump series name was reactivated in 2009 for use in the Teller-Park soil survey. This series was originally established in 1959 in Chaffee County, Colorado, in the Trout Creek Watershed Area, which is now a part of the soil survey of Pike and San Isabel National Forests, Northern Part. The name is from a townsite in Park County.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Series control section: The zone from 0 to 43 cm (0 to 17 inches).
Particle-size control section: The zone from 25 to 43 cm. (A2, Bk horizons)
Mollic epipedon: from 0 to 23 cm. (A1, A2 horizons)
Cambic horizon and accumulations of secondary carbonates: from 23 to 43 cm. (Bk horizon)
Lithic contact: The contact with limestone at 43 cm. (R layer)
The assignment of the cation-exchange activity class is inferred from lab data from similar soils in the surrounding area.
Taxonomic Version: Classified according to Keys to Soil Taxonomy, 11th Edition, 2010.