LOCATION CLANCY MTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Typic Argiustolls
TYPICAL PEDON: Clancy sandy clay loam, in rangeland (colors are for dry soil unless otherwise noted).
A--0 to 8 inches; dark brown (10YR 3/3) sandy clay loam, very dark brown (10YR 2/2) moist; weak medium and fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine and few fine roots; many very fine, fine and few medium pores; 10 percent pebbles; neutral (pH 7.0); clear smooth boundary. (6 to 12 inches thick)
Bt1--8 to 15 inches; yellowish brown (10YR 5/4) gravelly sandy clay loam, brown (10YR 4/3) moist; moderate medium prismatic structure parting to moderate medium and fine subangular blocky; slightly hard, friable, moderately sticky and slightly plastic; many very fine and few fine roots; many very fine and few fine tubular and interstitial pores; many faint clay films bridging sand grains and on faces of peds; 20 percent pebbles; neutral (pH 6.9); clear smooth boundary.
Bt2--15 to 22 inches; light olive brown (2.5Y 5/4) gravelly sandy clay loam, olive brown (2.5Y 4/4) moist; moderate medium and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and few fine roots; many very fine and few fine tubular and interstitial pores; common faint clay films bridging sand grains and on faces of peds; 25 percent pebbles; neutral (pH 6.8); clear wavy boundary. (Combined thickness of Bt horizons is 6 to 16 inches)
BC--22 to 30 inches; olive brown (2.5Y 4/4) gravelly coarse sandy loam, dark grayish brown (2.5Y 4/2) moist; weak medium and fine subangular blocky structure; soft, very friable, slightly sticky and nonplastic; few very fine roots; common very fine tubular and interstitial pores; 30 percent pebbles; neutral (pH 6.6); clear irregular boundary. (8 to 20 inches thick)
Cr--30 to 55 inches; olive gray (5Y 5/2) decomposed granite bedrock (grus) that crushes to very gravelly loamy coarse sand; neutral (pH 7.2). (14 to 34 inches thick)
R--55 inches; hard granite bedrock.
TYPE LOCATION: Jefferson County, Montana; 800 feet south and 1,100 west of the NE corner of sec. 30, T. 9 N., R. 2 W.
RANGE IN CHARACTERISTICS:
Soil temperature - 38 to 44 degrees F.
Moisture control section - between 4 and 12 inches.
Mollic epipedon thickness - 7 to 15 inches.
Depth to argillic horizon - 6 to 12 inches.
Depth to Cr horizon - 20 to 40 inches.
Depth to R horizon - 40 to 60 inches.
Surface stones or boulders - 0 to 3 percent.
A horizon - Hue: 10YR or 2.5Y
Value: 3 or 4 dry; 2 or 3 moist
Chroma: 2 or 3
Texture: sandy loam, coarse sandy loam, sandy clay loam, or loam
Clay content: 15 to 25 percent
Rock fragments: 5 to 25 percent pebbles (mostly less than 7mm in diameter)
Rock fragments, surface cover: 0 to 3 percent stones or boulders
Reaction: pH 6.1 to 7.3
Bt horizons - Hue: 10YR or 2.5Y
Value: 4 or 5 dry; 3 or 4 moist
Chroma: 3, 4, or 6
Texture: sandy clay loam or clay loam
Clay content: 20 to 30 percent
Rock fragments: 10 to 35 percent pebbles (mostly less than 7mm in diameter)
Reaction: pH 6.6 to 7.3
BC horizon - Hue: 10YR or 2.5Y
Value: 4, 5, or 6 dry; 4 or 5 moist
Chroma: 2, 3, 4, or 6
Texture: coarse sandy loam or sandy loam
Clay content: 10 to 18 percent
Rock fragments: 10 to 35 percent pebbles (mostly less than 7mm in diameter)
Reaction: pH 6.1 to 7.3
COMPETING SERIES:
Absarook (MT) - does not have a paralithic contact above the lithic contact; has horizons of secondary carbonate accumulation.
Beartooth (MT) - does not have a lithic contact above a depth of 60 inches.
Beeno (WY) - does not have a lithic contact above a depth of 60 inches.
Bielenberg (MT) - does not have a lithic contact above a depth of 60 inches.
Bookcliff (UT) - does not have a lithic contact above a depth of 60 inches.
Bullflat (SD) - does not have a lithic contact above a depth of 60 inches.
Burtoner (MT) - has a lithic contact at 20 to 40 inches.
Clasoil (MT) - does not have a lithic contact above 60 inches.
Cortyzack (CO) - does not have a lithic contact above a depth of 60 inches.
Dooley (MT) - has substratum of till that has a bulk density of 1.55 and greater; does not have a lithic contact above a depth of 60 inches.
Empedrado (CO) - does not have a lithic contact above a depth of 60 inches.
Fairfield (MT) - does not have a lithic contact above a depth of 60 inches.
Farnuf (MT) - does not have a lithic contact above a depth of 60 inches.
Felor (SD) - does not have a lithic contact above a depth of 60 inches.
Greenway (SD) - does not have a lithic contact above a depth of 60 inches.
Gurney (SD) - has a lithic contact at depths of 20 to 40 inches.
Hangdo (UT) - does not have lime above a depth of 40 inches; does not have a lithic contact above a depth of 60 inches.
Hoppers (MT) - has a lithic contact at 20 to 40 inches.
Hyalite (MT) - has a discontinuity of sandy-skeletal material above 40 inches and immediately below the argillic horizon; does not have a lithic contact above a depth of 60 inches.
Jeffcity (MT) - has a horizon of secondary carbonate accumulation; does not have a BC horizon.
Lefor (ND) - does not have a lithic contact above a depth of 60 inches.
Lininger (CO) - does not have a lithic contact above a depth of 60 inches.
Livona (ND) - does not have a lithic contact above a depth of 60 inches.
Martinsdale (MT) - does not have a lithic contact above a depth of 60 inches.
Maudlin (CO) - has a lithic contact at depths of 20 to 40 inches.
Meagher (MT) - does not have a lithic contact above a depth of 60 inches.
Moen (CO) - has a lithic contact at depths of 20 to 40 inches; does not have a paralithic contact above the lithic contact.
Pianohill (MT) - has a lithic contact at 20 to 40 inches.
Placerton (MT) - has a horizon of secondary carbonate accumulation.
Reeder (ND) - does not have a lithic contact above a depth of 60 inches.
Reedwest (MT) - does not have a lithic contact above 60 inches; has horizon of secondary carbonate accumulation.
Snakejohn (UT) - does not have a paralithic contact above the lithic contact; has horizons of secondary carbonate accumulation.
Sponseller (AZ) - does not have a paralithic contact above the lithic horizon; does not have a lithic contact above a depth of 60 inches.
Trag (CO) - does not have a paralithic contact above the lithic contact; does not have a lithic contact above a depth of 60 inches.
Trazuni (NM) - does not have a lithic contact above 60 inches.
Tschicoma (NM) - does not have a paralithic contact above a lithic contact; does not have a lithic contact above a depth of 60 inches.
Ulrant (WY) - has a horizon of secondary carbonate accumulation; does not have a paralithic contact at depths of 20 to 40 inches; over a lithic contact.
Vida (MT) - has substratum of till that has a bulk density of 1.55 and greater; does not have a lithic contact above a depth of 60 inches.
Watrous (ND) - has a lithic contact at 40 to 60 inches.
Wemple (MT) - does not have a paralithic contact over a lithic contact; does not have lithic contact above a depth of 60 inches.
Williams (ND) - does not have a lithic contact above a depth of 60 inches.
Yegen (MT) - does not have a lithic contact above a depth of 60 inches.
GEOGRAPHIC SETTING:
Landform - hills, mountains, ridges and escarpments.
Elevation - 4,400 to 6,000 feet.
Slope- 2 to 45 percent.
Parent material - colluvium and residuum derived from granite bedrock.
Climate - long, cold winters; moist springs; warm summers.
Mean annual precipitation - 15 to 19 inches.
Mean annual air temperature - 36 to 42 degrees F.
Frost-free period - 70 to 105 days.
DRAINAGE AND PERMEABILITY: Well drained, moderate permeability in argillic horizon and rapid in the BC horizon.
USE AND VEGETATION: Clancy soils are primarily used for rangeland and wildlife habitat. The potential native vegetation is mainly rough fescue, Idaho fescue, bluebunch wheatgrass, prairie junegrass, lupine, fringed sagewort, milkvetch, and threetip sagebrush. Areas with a forest canopy have an overstory of ponderosa pine, Douglas fir, limber pine and an understory of Idaho fescue, bluebunch wheatgrass, and Rocky mountain juniper.
DISTRIBUTION AND EXTENT: Clancy soils are of small extent in southwestern Montana.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Jefferson County, Montana, 1998.
REMARKS: Soil interpretation record: MT1558, MT1559, MT3046. Diagnostic horizons and features recognized in this pedon are: a mollic epipedon from the soil surface to 8 inches (A horizon); an argillic horizon from 8 to 22 inches (Bt1, Bt2 horizons); a particle-size control section from 8 to 22 inches (Bt1, Bt2 horizons); a layer of decomposed granite bedrock (grus) between 30 and 55 inches (Cr horizon); hard granite bedrock at 55 inches (R horizon). Clancy soils have a frigid temperature regime and an ustic moisture regime.