LOCATION TRAVANS                 ID

Established Series
IRD RGK/CBR/EED
05/2018

TRAVANS SERIES

Landscape--ridges, hillslopes
Landform--hills
Slope--2 to 60 percent
Parent material--loess-influenced colluvium over rhyolite
Mean annual precipitation--about 250 mm
Mean annual air temperature--about 5 degrees C
Depth class--moderately deep
Drainage class--well drained
Soil moisture regime--aridic bordering on xeric
Soil temperature regime--frigid

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Xeric Haplocalcids

TYPICAL PEDON: Travans gravelly loam on an 11-percent slope in an area of rangeland at an elevation of 1554 m

A--0 to 13 cm; gravelly loam, brown (10YR 5/3) dry, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and slightly plastic; common very fine and fine roots; common very fine and fine irregular pores; 20 percent gravel; finely disseminated calcium carbonate (5 percent calcium carbonate equivalent); strongly effervescent; slightly alkaline (pH 7.8); clear smooth boundary

Bk1--13 to 28 cm; gravelly loam, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and fine tubular pores; 20 percent gravel; finely disseminated calcium carbonate (15 percent calcium carbonate equivalent); violently effervescent; moderately alkaline (pH 8.0); clear smooth boundary

Bk2--28 to 53 cm; very gravelly loam, very pale brown (10YR 7/3) dry, yellowish brown (10YR 5/4) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and slightly plastic; common very fine and fine roots; common very fine and fine tubular pores; 35 percent gravel; finely disseminated calcium carbonate (25 percent calcium carbonate equivalent); calcium carbonate coatings 2 to 5 mm thick on bottom of rock fragments; violently effervescent; moderately alkaline (pH 8.0); gradual smooth boundary

Bk3--53 to 76 cm; extremely gravelly sandy loam, very pale brown (10YR 8/3) dry, light yellowish brown (10YR 6/4) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; few very fine and fine roots; few very fine and fine tubular pores; 30 percent gravel, 20 percent channers, and 10 percent flagstones; finely disseminated calcium carbonate (30 percent calcium carbonate equivalent); calcium carbonate coatings 2 to 5 mm thick on bottom of rock fragments; violently effervescent; moderately alkaline (pH 8.0); abrupt smooth boundary

R--76 cm; fractured rhyolite

TYPE LOCATION: Clark County, Idaho; latitude 44.13569 degrees north, longitude 112.53758 degrees west, datum WGS 84 (coordinates determined with a GPS)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--4 to 8 degrees C
Depth to bedrock--50 to 100 cm
Depth to calcic horizon--5 to 13 cm

Particle-size control section
Clay content--8 to 14 percent
Total rock fragment content--45 to 65 percent

A horizon
Value--5 or 6 dry, 3 or 4 moist
Chroma--3 or 4 dry or moist
Gravel content--15 to 35 percent
Reaction--7.9 to 8.2 (moderately alkaline)
Thickness--5 to 13 cm

Bk1 and Bk2 horizons
Value--5 to 8 dry, 4 to 6 moist
Chroma--2 to 4 dry or moist
Texture--loam, sandy loam
Total rock fragment content--15 to 55 percent
Gravel content--15 to 55 percent
Reaction--7.9 to 8.4 (moderately alkaline)
Thickness--38 to 71 cm

Bk3 horizon
Value--5 to 8 dry, 4 to 6 moist
Chroma--2 to 4 dry or moist
Total rock fragment content--60 to 80 percent
Gravel content--25 to 50 percent
Channer content--15 to 40 percent
Flagstone content--10 to 35 percent
Reaction--7.9 to 8.4 (moderately alkaline)

COMPETING SERIES:
Duckree, Misfire, Packmo, Zer--lithic contact at a depth of more than 150 cm (very deep)
Holinrock--18 to 26 percent clay in particle-size control section
Siri--lithic contact at a depth of more than 150 cm (very deep); 18 to 25 percent clay in particle-size control section

GEOGRAPHIC SETTING:
Elevation--1500 to 2300 m
Climate--warm summers, cold winters
Mean annual precipitation--200 to 330 mm
Mean annual air temperature--3 to 7 degrees C
Frost-free period--70 to 100 days
Aspect--5 counterclockwise to 270 clockwise

GEOGRAPHICALLY ASSOCIATED SOILS:
Mogg, Shagel--lithic contact at a depth of less than 50 cm (shallow); on adjacent hillslopes

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--high

USE AND VEGETATION:
Major use--livestock grazing
Potential natural vegetation--black sagebrush, bluebunch wheatgrass, Sandberg bluegrass

DISTRIBUTION AND EXTENT: Lost River Valleys and Mountains, Idaho; MLRA 12; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Clark County, Idaho; 2018

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Calcic horizon--zone from 28 to 76 cm
*Depth to lithic contact--76 cm
*Particle-size control section--zone from 25 to 76 cm

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National Cooperative Soil Survey
U.S.A.