LOCATION DUTCHCANYON IDEstablished Series
TAXONOMIC CLASS: Coarse-loamy, carbonatic, frigid Typic Calcixerolls
TYPICAL PEDON: Dutchcanyon gravelly silt loam, rangeland; on a 15 percent slope at 6,600 feet elevation. When described on June 26, 1989 the soil was dry to 5 inches and moist below. (Color is for air dry soil unless otherwise noted.)
A--0 to 7 inches; dark grayish brown (10YR 4/2) gravelly silt loam, very dark brown (10YR 2/2) moist; moderate thick platy structure parting to moderate medium subangular blocky; soft, very friable, slightly sticky and slightly plastic; common very fine and few fine roots; many very fine irregular pores; strongly effervescent (18 percent calcium carbonate equivalent); disseminated lime; 15 percent gravel; slightly alkaline (pH 7.7); clear smooth boundary. (6 to 10 inches thick)
AB--7 to 13 inches; grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; soft, very friable, moderately sticky and moderately plastic; common very fine and few fine roots; many very fine tubular and irregular pores; violently effervescent (25 percent calcium carbonate equivalent); disseminated lime; 10 percent gravel; slightly alkaline (pH 7.8); clear wavy boundary. (4 to 10 inches thick)
Bk--13 to 27 inches; light gray (10YR 7/2) loam, light gray (10YR 7/2) moist; massive; slightly hard, very friable, slightly sticky and moderately plastic; common very fine and few fine roots; many very fine tubular pores; violently effervescent (40 percent calcium carbonate equivalent); lime segregated into few fine seams; 15 percent very hard gravel size nodules made of material similar to the matrix; moderately alkaline (pH 8.0); gradual wavy boundary. (7 to 14 inches thick)
C1--27 to 40 inches; white (10YR 8/1) loam, very pale brown (10YR 8/2) moist; massive; slightly hard, very friable, slightly sticky and moderately plastic; few very fine roots; few very fine tubular pores; violently effervescent (>65 percent calcium carbonate equivalent); disseminated lime; moderately alkaline (pH 8.0); clear wavy boundary. (7 to 13 inches thick)
C2--40 to 53 inches; white (10YR 8/1) loam, pale yellow (2.5Y 8/2) moist; 30 percent medium and large distinct light brownish gray (10YR 6/2) mottles and 5 percent medium distinct brownish yellow (10YR 6/6) moist mottles; massive; slightly hard, very friable, slightly sticky and moderately plastic; few very fine roots; few very fine tubular pores; violently effervescent (>65 percent calcium carbonate equivalent); disseminated lime; moderately alkaline (pH 8.3); gradual wavy boundary. (12 to 13 inches thick)
C3--53 to 61 inches; white (10YR 8/1) loam, light gray (2.5Y 7/2) moist; 30 percent medium and large distinct light brownish gray (10YR 6/2) mottles and 5 percent medium distinct brownish yellow (10YR 6/6) moist mottles; massive; hard, firm, slightly sticky and moderately plastic; violently effervescent (>65 percent calcium carbonate equivalent); disseminated lime; 15 percent very hard gravel size nodules made of material similar to the matrix; moderately alkaline (pH 8.3); gradual wavy boundary.
TYPE LOCATION: Bear Lake County, Idaho; about 1 mile southwest of Fish Haven; about 1,700 feet west and 3,000 feet north of the southeast corner of sec. 28, T.16S., R.43E.; 42 degrees, 0 minutes, 33 seconds north latitude, 111 degrees, 25 minutes, 49 seconds west longitude.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness - 7 to 16 inches
Average annual soil temperature - 40 to 43 degrees F
Particle-size control section (averages)
Clay content - 12 to 18 percent
Gravel content - 0 to 25 percent
Calcium carbonate equivalent - 40 to 65 percent
A horizons
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Clay content - 12 to 20 percent
Gravel content - 0 to 25 percent
Calcium carbonate equivalent - 10 to 30 percent
Reaction - slightly or moderately alkaline
Bk horizon
Hue - 10YR or 7.5YR
Value - 6 or 7 dry, 4 through 7 moist
Chroma - 2 or 3 dry, 2 through 4 moist
Texture - L, GR-L, SIL or GR-SIL
Clay content - 12 to 18 percent
Gravel content - 0 to 25 percent
Calcium carbonate equivalent - 30 to 45 percent
Reaction - moderately alkaline
C horizon
Hue - 10YR, 7.5YR or 2.5Y
Value - 6 through 8 dry, 5 through 8 moist
Chroma - 1 through 4 dry or moist
Texture - L, SIL or GR-L
Clay content - 12 to 18 percent
Gravel content - 0 to 20 percent
Calcium carbonate equivalent - 45 to 80 percent
Reaction - moderately alkaline
COMPETING SERIES: This is the Fishaven (T) series. Fishaven soils are moderately deep to limestone.
GEOGRAPHIC SETTING: Dutchcanyon soils are on hills and mountainsides. Slopes range from 4 to 35 percent. Elevations range from 5,850 to 6,900 feet. The soil formed in alluvium and residuum from limestone. Average annual precipitation is 13 to 20 inches, average annual temperature is 38 to 43 degrees F., the frost free period is 65 to 95 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clegg, the competing Fishaven (T), Frenchollow (T) and Yeates Hollow soils. Clegg soils are pachic, have an argillic horizon, are not calcareous to the surface and lack carbonatic mineralogy. Fishaven soils formed in similar materials to Dutchcanyon and are on similar positions on hills. Frenchollow and Yeates Hollow soils have greater than 35 percent clay in the particle size control section. Frenchollow soils are generally on north and east-facing hillsides. Clegg soils are on east and north-facing hillsides on a lower landscape position than Dutchcanyon. Yeates Hollow soils are on hillsides, mountainsides and fan terraces, above and below Dutchcanyon.
DRAINAGE AND PERMEABILITY: Well drained; moderate to very rapid runoff; moderate permeability.
USE AND VEGETATION: Dutchcanyon soils are used for rangeland, nonirrigated cropland and building sites. Typical crops consist of small grains. The potential native vegetation is mountain big sagebrush and bluebunch wheatgrass.
DISTRIBUTION AND EXTENT: Southeastern Idaho. The soils of this series are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Bear Lake County, Idaho, 2008. The name is from a nearby canyon.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 13 inches (the A and AB horizons).
Calcic horizon - the zone from 13 to 27 inches (the Bk horizon)
Particle-size control section - The zone from 10 inches to 40 inches (part of the AB, the Bk and C1 horizons).
Carbonatic mineralogy - the particle-size control section averages more than 40 percent calcium carbonate equivalent.
Calcixeroll feature - the soil is calcareous in all parts above the Bk horizon