LOCATION HAYCAMP COEstablished Series
TAXONOMIC CLASS: Fine, smectitic Typic Haplocryepts
TYPICAL PEDON: Haycamp cobbly clay loam, on a west facing, 48 percent slope in spruce-fir and aspen woodland at an elevation of 9,500 feet. Described on August 8, 1985. (Colors are for dry soil unless otherwise stated.)
Oe--0 to 1 inch; partly decomposed leaves, twigs, and roots. (1 to 3 inches thick)
A--1 to 5 inches; very dark brown (10YR 2/2) cobbly clay loam, black (10YR 2/1) moist; weak fine subangular blocky structure parting to weak fine granular; soft, friable, slightly sticky and moderately plastic; many very fine, few fine, and few medium roots; many very fine continuous pores; 5 percent gravel, 15 percent cobble, 5 percent stones; slightly acid (pH 6.2); clear smooth boundary. (2 to 5 inches thick)
E--5 to 13 inches; light gray (10YR 7/2) cobbly clay, grayish brown (10YR 5/2) moist; weak medium subangular blocky structure; extremely hard, very firm, moderately sticky and moderately plastic; common very fine, fine, and coarse, and few medium roots; many very fine continuous pores; 10 percent gravel; 15 percent cobble, 5 percent stones; slightly acid (pH 6.2); clear wavy boundary. (5 to 10 inches thick)
Bw1--13 to 21 inches; pale brown (10YR 6/3) cobbly clay, brown (10YR 5/3) moist; moderate coarse subangular blocky structure parting to moderate fine subangular blocky; extremely hard, extremely firm, moderately sticky and moderately plastic; common medium and coarse roots; many very fine continuous pores; 10 percent gravel, 10 percent cobble; slightly acid (pH 6.2); clear wavy boundary.
Bw2--21 to 30 inches; pale brown (10YR 6/3) clay, brown (10YR 5/3) moist; moderate coarse subangular blocky structure parting to moderate medium subangular blocky; extremely hard, very firm, moderately sticky and moderately plastic; common fine, medium and coarse roots; many very fine continuous pores; 10 percent gravel, 5 percent cobble; slightly acid (pH 6.4); gradual wavy boundary.
Bw3--30 to 38 inches; mixed colors of very pale brown (10YR 7/3) and (10YR 7/4) clay, brown (10YR 5/3) and light yellowish brown (10YR 6/4) moist; moderate medium subangular blocky structure; extremely hard, very firm, moderately sticky and moderately plastic; common fine and medium and few coarse roots; many very fine continuous pores; 10 percent gravel, 5 percent cobble; slightly acid (pH 6.4); gradual wavy boundary. (combined thickness of the Bw horizons is 15 to 40 inches)
C1--38 to 56 inches; light brownish gray (10YR 6/2) gravelly clay, brown (10YR 5/3) moist; few fine distinct light yellowish brown (10YR 6/4) lithochromic mottles; massive; extremely hard, very firm, moderately sticky and moderately plastic; common medium and coarse and few fine roots; many very fine continuous pores; 15 percent gravel, 10 percent cobble; neutral (pH 6.6); clear wavy boundary. (15 to 30 inches thick)
C2--56 to 61 inches; light brownish gray (10YR 6/2) very cobbly clay loam, grayish brown (10YR 5/2) moist; few fine distinct light yellowish brown (10YR 6/4) lithochromic mottles; massive; extremely hard, extremely firm, moderately sticky and moderately plastic; 10 percent gravel, 25 percent cobble; neutral (pH 6.6).
TYPE LOCATION: Montezuma County, Colorado; about 8 miles southwest of Rico, Colorado; along an old logging road branching off from Taylor Mesa Road; located about 900 feet west and 2,400 feet north of the southeast corner of Sec. 29, T. 39 N., R. 12 W.; Wallace Ranch USGS quad.; Lat. 37 degrees, 36 minutes, 41 seconds N.; Long. 108 degrees, 11 minutes, 51 seconds W., NAD 27
RANGE IN CHARACTERISTICS:
Soil moisture regime: Udic moisture regime. Dry in some part fewer than 45 cumulative days (typic udic).
Mean annual soil temperature: 36 to 40 degrees F.
Mean summer soil temperature: 43 to 47 degrees F. with an O horizon.
Surface rock fragments: 0 to 2 percent stones, sandstone fragments.
Base saturation: 70 to 100 percent
Lithology of rock fragments: sandstone and shale
Particle-size control section:
Clay content: 35 to 50 percent
Rock fragment content: 5 to 25 percent
A horizon:
Value: 2 to 5 dry, 2 or 3 moist
Chroma: 1 to 3 dry and moist
Rock fragments: 15 to 35 percent
Reaction: moderately acid or slightly acid
E horizon:
Value: 6 or 7 dry, 5 or 6 moist
Chroma: 2 or 3 dry and moist
Texture, fine earth fraction: CL, C
Rock fragments: 10 to 35 percent
Reaction: moderately acid or slightly acid
Bw horizons:
Hue: 7.5YR or 10YR
Value: 5 to 7 dry, 4 to 6 moist
Chroma: 3 to 6 dry and moist
Texture, fine earth fraction: CL, C
Rock fragments: 5 to 25 percent
Reaction: moderately acid to neutral
C horizon:
Hue: 2.5Y to 7.5YR
Value: 5 to 7 dry, 4 to 6 moist
Chroma: 2 to 4 dry and moist
Texture, fine earth fraction: CL, C
Rock fragments: 15 to 50 percent
Reaction: slightly acid or neutral
COMPETING SERIES: This is the
Peaspear series.
Peaspear: has horizons of calcium carbonate accumulation.
GEOGRAPHIC SETTING:
Parent material: slope alluvium and colluvium derived from sandstone and shale.
Landform: mountain slopes and canyons
Slopes: 30 to 80 percent
Elevation: 8,600 to 11,500 feet
Mean annual air temperature: 32 to 38 degrees F.
Mean annual precipitation: 30 to 40 inches.
Wettest months: July and August.
Driest months: May and June receive the least precipitation, however the soils are still moist from snowmelt.
Frost-free period: 40 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dressel, Jersey, Needleton, and Storm soils. All are on mountain slopes.
Dressel: soils have thick mollic epipedons and a loamy-skeletal particle-size control sections.
Jersey: have mollic epipedons and a loamy-skeletal particle-size control section.
Needleton: have argillic horizons and a loamy-skeletal particle-size control section.
Storm: have a loamy-skeletal particle-size control section.
DRAINAGE AND PERMEABILITY: Well-drained; medium to high runoff; slow permeability.
USE AND VEGETATION: Haycamp soils are used for timber production, livestock grazing, and wildlife habitat. Native vegetation consists of Engelmann's spruce, subalpine fir, quaking aspen, whortleberry, and American vetch. Grasses and forbs are mainly mountain brome and nodding brome, Letterman needlegrass, wheatgrass, aspen peavine, elk sedge, and meadow rue.
DISTRIBUTION AND EXTENT: Southwestern Colorado. LRR E, MLRA 48A. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana.
SERIES PROPOSED: Montezuma County, (Animas-Dolores Soil Survey Area), Colorado, 1997.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: The zone from 1 to 13 inches. (A and E horizons)
Cambic horizon: The zone from 13 to 38 inches. (Bw horizons)
Particle-size control section: The zone from 11 to 41 inches (part of the E, the Bw1, Bw2, Bw3, and part of the C1 horizon)
Keys to Soil Taxonomy: Soil Taxonomy, 1999