LOCATION LINTIM COTentative Series
TAXONOMIC CLASS: Fine, smectitic Pachic Argicryolls
TYPICAL PEDON: Lintim loam, on a south facing 13 percent convex slope in rangeland at an elevation of 8,100 feet. (Colors are for dry soil unless otherwise noted.) When described on July 18, 1984 the soil was dry throughout.
A1--0 to 5 inches; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; moderate fine granular structure; slightly hard, very friable, moderately sticky and moderately plastic; many fine and very fine roots; few fine tubular pores; 3 percent gravel; neutral (pH 6.6); clear smooth boundary.
A2--5 to 20 inches; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure parting to moderate fine subangular blocky; hard, friable, moderately sticky and moderately plastic; common fine roots; few fine tubular pores; 3 percent gravel; neutral (pH 6.6); clear smooth boundary. (The combined thickness of the A horizon is 16 to 25 inches)
Bt1--20 to 30 inches; brown (10YR 5/3) clay, brown (10YR 4/3) moist; strong medium subangular blocky structure; very hard, very firm, very sticky and very plastic; few fine roots; few fine tubular pores; many continuous distinct clay films on faces of peds; 5 percent gravel; neutral (pH 6.8); gradual smooth boundary.
Bt2--30 to 40 inches; yellowish brown (10YR 5/4) clay, dark yellowish brown (10YR 4/4) moist; strong medium subangular blocky structure; very hard, very firm, very sticky and very plastic; few fine roots; few fine tubular pores; common discontinuous distinct clay films on faces of peds; 5 percent gravel; neutral (pH 6.8); gradual smooth boundary. (The combined thickness of the Bt horizon is 20 to 50 inches)
BC--40 to 65 inches; pale brown (10YR 6/3) clay, brown (10YR 5/3) moist; massive; hard, firm, moderately sticky and moderately plastic; few fine roots; few fine tubular pores; 5 percent gravel; neutral (pH 7.0).
TYPE LOCATION: Routt County, Colorado; about 2 miles east of Oak Creek, Colorado; located about 800 feet west and 1,600 feet north of the southeast corner of sec. 33, T. 4 N., R. 85 W.; Oak Creek USGS quad; lat. 40 degrees 16 minutes 15 seconds N. and long. 106 degrees 55 minutes 27 seconds W., NAD 27
RANGE IN CHARACTERISTICS:
Soil moisture: Dry in some part for greater than 45 days (cumulative).
Mean annual soil temperature: 38 to 45 degrees F
Mean annual summer soil temperature: 52 to 58 degrees F
Depth to argillic horizon: 15 to 23 inches
Thickness of the mollic epipedon: 17 to 34 inches
Thickness of the argillic horizon: 20 to 45 inches
[t1]Linear extensibility in upper 40 inches (estimated): 3.0 to 6.0 cm
Lithology of r[t2]ock fragments: shale
Particle-size control section (weighted average):
Clay content: 35 to 47 percent
Rock fragments: 0 to 5 percent gravel
A horizon:
Hue: 7.5YR to 10YR
Value: 3 to 5 dry, 2 or 3 moist
Chroma: 1 to 3 dry or moist
Texture: L, SIL, CL
Clay content: 15 to 30 percent
Rock fragments: 0 to 5 percent gravel
Reaction: slightly acid or neutral
Bt horizon:
Hue: 7.5YR to 10YR
Value: 4 to 6 dry, 3 to 6 moist
Chroma: 2 to 5 dry or moist
Texture: CL, C, SIC
Clay content: 35 to 50 percent
Rock fragments: 0 to 5 percent gravel
Reaction: slightly acid or neutral
BC horizon (C horizon in some pedons)
Hue: 10YR to 2.5 Y
Value: 4 to 6 dry, 4 or 5 moist
Chroma: 3 or 4 dry or moist
Texture: CL, C
Clay content: 35 to 45 percent
Rock fragments: 0 to 5 percent gravel, 0 to 5 percent cobble
Reaction: slightly acid to slightly alkaline
COMPETING SERIES: Current competitors are Bischoff, Burnette, Cochetopa, Faim, Fulcher, Grouseville, Guero, Leemorris, Mancos, Mayflower, Paulson, Perinos, Richens, Runlett, Skutum, Teedown, and Winridge series.
Bischoff: have a presumed xeric moisture regime.
Burnette, Fulcher, Grouseville, and Paulson: have horizons of secondary calcium carbonate accumulation.
Cochetopa: are derived from igneous parent material and have rock fragments that are dominantly stones
Faim: have a xeric moisture regime.
Guero: have rock fragments of tuff, breccia, andesite, and rhyolite
Leemorris, Mancos, Mayflower, Winridge and Runlett: have a lithic contact at depths of 20 to 40 inches.
Perinos: have hue redder than 7.5YR in the Bt horizon.
Richens: are presumed to be dry for less than 45 days (typic udic moisture subclass).
Skutum: have a discontinuity at the C horizon that has sandy loam textures.
Teedown: have a typic udic moisture regime (30 inches MAP).
GEOGRAPHIC SETTING:
Parent material: slope alluvium and colluvium derived from shale
Landform: mountains, hills, and structural benches
Slopes: 3 to 65 percent
Elevation: 6,500 to 9,600 feet
Mean annual air temperature: 37 to 44 degrees F
Mean annual precipitation: 18 to 25 inches
Precipitation pattern: Precipitation is relatively evenly distributed throughout the year
Frost-free period: 50 to 80 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Elkhead and Fingerrock series. The Elkhead soils are moderately well drained and are on floodplains. The Fingerrock soils have more than 35 percent rock fragments and less than 35 percent clay and are on terraces and mesas.
DRAINAGE AND PERMEABILITY: well drained, moderate to very high runoff, slow permeability.
USE AND VEGETATION: The major uses are livestock grazing, wildlife habitat, and recreational purposes. The native plant community is serviceberry, mountain big sagebrush, Idaho fescue, and snowberry.
DISTRIBUTION AND EXTENT: Northwest Colorado; LRR E, MLRA 48A; moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Routt County, Colorado, Routt County Area soil survey, 1998. The name is coined.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 20 to 40 inches. (Bt1 and Bt2 horizons)
Mollic epipedon (Pachic feature): The zone from 0 to 20 inches. (A1 and A2 horizons)
Argillic horizon: The zone from 20 to 40 inches. (Bt1 and Bt2 horizons)
Taxonomic Version: classified according to the 9th edition, 2003