LOCATION TROUTVILLE CO+WYEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Lamellic Haplocryalfs
TYPICAL PEDON: Troutville gravelly sandy loam - forest. (Colors are for dry soil otherwise noted.)
0i--0 to 3 inches; undecomposed needles, bark, twigs, and grasses. (1 to 3 inches thick)
0e--3 to 4 inches; partially decomposed organic material derived from the material above. (1 to 2 inches thick)
A--4 to 7 inches; dark brown (10YR 4/3) sandy loam, very dark brown (10YR 3/3) moist; strong medium crumb structure; soft, friable, nonstick and nonplastic; 10 percent pebbles; neutral (pH 6.8); clear wavy boundary. (O to 4 inches thick)
E--7 to 20 inches; light gray (10YR 7/2) cobbly sandy loam, brown (10YR 5/3) moist; weak thin platy structure parting to weak medium granular; slightly hard, very friable, nonsticky and nonplastic; 20 percent cobbles and stones; neutral (pH 6.8); diffuse wavy boundary. (5 to 18 inches thick)
Bt--20 to 44 inches; variable colors including light yellowish brown (10YR 5/4) and brown (7.5YR 5/4) extremely stony sandy loam in which there are many discontinuous lamellae of sandy loam, sandy clay loam or loam; yellowish brown (10YR 5/4) moist and brown (7.5YR 4/4) moist; weak medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; nearly continuous wax-like coatings on peds in lamellae; wax-like bridges between sand grains; 60 percent stones; neutral (pH 6.8); diffuse irregular boundary. (10 to 32 inches thick)
C--44 to 60 inches; yellowish brown (10YR 5/4) extremely stony sandy loam, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; 60 percent stones; neutral (pH 6.8). (Several feet thick)
TYPE LOCATION: Lake County, Colorado; approximately 2-1/2 miles along the first trail to east of Buckeye Creek and 40 feet south of trail in NE 1/4 Sec. 32, T. 8S., R. 79 W.
RANGE IN CHARACTERISTICS: Mean annual soil temperature ranges from 36 to 40 degrees F. and mean summer soil temperature ranges from 43 to 47 degrees F. Base saturation ranges from 60 to 100 percent in all subhorizons of the argillic horizon. Depth to the top of the argillic horizon from the mineral surface is less than 24 inches, and depth from the mineral surface to the base of the argillic horizon ranges from 17 to 55 inches. Rock fragments range from 35 to 80 percent in a major part of the solum and any C horizon and are mainly 10 to 24 inches in diameter. These soils are dry in some part of the moisture control section for some period of nearly every year.
The A horizon, if present, has hue of 2.5Y through 7.5YR, value of 4 or 5 dry, 2 or 3 moist, and chroma of 1 through 3. It ranges from moderately acid to mildly alkaline.
The E horizon has hue of 2.5Y through 7.5YR, value of 4 through 8 dry, 3 through 7 moist, and chroma of 1 through 4. It ranges from moderately acid to mildly alkaline.
The Bt horizon has hue of 2.5Y through 7.5YR, value of 5 through 7 dry, 4 through 6 moist, and chroma of 1 through 6. It is typically extremely stony sandy loam containing lamellae of sandy loam, sandy clay loam, loam or clay loam. When mixed, texture is no coarser than sandy loam. This horizon ranges from strongly acid to mildly alkaline. Lamellae 1cm or more thick comprise 6 to 8 inch thickness in this horizon.
The C horizon has hue of 2.5Y through 7.5YR. It is typically extremely stony sandy loam but clay ranges from 5 to 18 percent, silt from 5 to 40 percent, and sand from 30 to 75 percent with more than 35 percent fine or coarser sand. This horizon ranges from moderately acid to mildly alkaline.
COMPETING SERIES: These are the Ceebee (NV), Hyannis (CO), Origo (NM), Siebert (CO), and Yochum (CO) series. Hyannis, Siebert, and Yochum soils have a paralithic contact at a depth of 20 to 40 inches. Ceebee and Origo soils have less than 60 percent base saturation in their Bt horizons.
GEOGRAPHIC SETTING: Troutville soils are on alluvial fans, terraces, glacial moraines, eskers, till plains, and mountainsides. Slopes gradients range from 2 to 60 percent. The soils formed in thick stony, moderately coarse-textured, transported material derived from mixed rock sources. At the type location the average annual precipitation is 18 to 25 inches and about 11 inches of this falls during the months of April through August. The mean annual temperature ranges from 32 to 38 degrees F. In Wyoming, mean annual precipitation is 15 to 30 inches. Elevation ranges from 8,000 feet to 11,400 feet in more southerly latitudes in the state. Frost free period is 10 to 60 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Pierian and Sanford soils. Pierian soils have a mollic epipedon and lack an argillic horizon. Sanford soils have a lithic contact above a depth of 40 inches.
DRAINAGE AND PERMEABILITY: Well drained to somewhat excessively drained; medium to slow runoff; moderately rapid or rapid permeability.
USE AND VEGETATION: These soils are used as native pastureland, forestry, and recreation. Principal native vegetation is lodgepole pine with some spruce and fir and with a weak understory of grasses and shrubs.
DISTRIBUTION AND EXTENT: Mountainous areas of central Colorado and adjacent parts of Wyoming. 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 an Argillic horizon with lamellae discontinuous vertically in the upper 6 inches.
Last updated by the state 1/93. Class confirmed
by Mayhugh 4/6/89.