LOCATION STONEMAN ID
Established Series
Rev. WGH/CBR/RGK
05/2018
STONEMAN SERIES
Landscape--lava fields
Landform--pahoehoe lava flows
Slope--1 to 12 percent
Parent material--eolian deposits
Mean annual precipitation--about 450 mm
Mean annual air temperature--about 3.3 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--cryic
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Calcic Pachic Haplocryolls
TYPICAL PEDON: Stoneman very fine sandy loam in an area of rangeland (Colors are for dry soil unless otherwise stated.)
A1--0 to 8 cm; very dark grayish brown (10YR 3/2) very fine sandy loam, very dark brown (10YR 2/2) moist; weak thin platy structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and common fine, medium, and coarse roots; many very fine irregular pores; 2 percent gravel; neutral (pH 7.2); clear smooth boundary
A2--8 to 30 cm; dark brown (10YR 3/3) very fine sandy loam, very dark brown (10YR 2/2) moist; moderate fine and medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; many very fine and common fine, medium, and coarse roots; many very fine tubular pores; 5 percent gravel and 5 percent cobbles; neutral (pH 7.2); gradual wavy boundary
2AB--30 to 50 cm; brown (10YR 4/3) very stony loam, dark brown (10YR 3/3) moist; moderate medium and coarse subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common medium, fine, and very fine roots; many very fine and common fine tubular pores; 10 percent gravel, 20 percent cobbles, and 25 percent stones; slightly alkaline (pH 7.4); gradual wavy boundary
2Bkq1--50 to 76 cm; brown (10YR 4/3) extremely stony loam, dark yellowish brown (10YR 3/4) moist; weak very fine and fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine, fine, and medium roots; common very fine irregular pores; 20 percent gravel, 20 percent cobbles, and 25 percent stones; calcium carbonate and silica coatings 1 to 3 mm thick on bottom of rock fragments (2 percent calcium carbonate equivalent); slightly alkaline (pH 7.6); abrupt wavy boundary
2Bkq2--76 to 109 cm; very pale brown (10YR 8/3) extremely cobbly loam, light yellowish brown (10YR 6/4) moist; weak fine and medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common very fine roots; many very fine tubular pores; 25 percent gravel, 45 percent cobbles, and 30 percent stones; calcium carbonate and silica coatings 1 to 5 mm thick on rock fragments; violently effervescent (30 percent calcium carbonate equivalent); moderately alkaline (pH 8.4); gradual wavy boundary
2Bkq3--109 to152 cm; very pale brown (10YR 7/3) extremely cobbly loam, yellowish brown (10YR 5/4) moist; weak very fine and fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine irregular pores; 25 percent gravel, 45 percent cobbles, and 30 percent stones; calcium carbonate and silica coatings 2 to 8 mm thick on rock fragments; violently effervescent (21 percent calcium carbonate equivalent); moderately alkaline (pH 8.4)
TYPE LOCATION: Clark County, Idaho; latitude 44.27167degrees north, longitude 111.98806 degrees west, datum WGS 84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--3.9 to 6.1 degrees C
Thickness of mollic epipedon--40 to 58 cm
Depth to calcic horizon--50 to 76 cm
Particle-size control section (weighted averages)
Clay content--8 to 18 percent
Total rock fragment content--35 to 65 percent
A horizon
Hue--10YR or 7.5YR dry or moist
Value--2 to 5 dry or moist
Chroma--1 to 3 dry or moist
Clay content--8 to 18 percent
Total rock fragment content--0 to 15 percent
Gravel content--0 to 10 percent
Cobble content--0 to 5 percent
Reaction--pH 6.6 to 7.3
Thickness--8 to 38 cm
2AB horizon
Hue--10YR or 7.5YR dry or moist
Value--2 to 5 dry or moist
Chroma--1 to 3 dry or moist
Clay content--8 to 18 percent
Total rock fragment content--35 to 60 percent
Gravel content--5 to 20 percent
Cobble content--15 to 40 percent
Stone content--15 to 25 percent
Reaction--pH 6.6 to 7.8
Thickness--20 to 50 cm
2Bkq1 horizon
Value--3 to 8 dry or moist
Chroma--3 or 4 dry or moist
Clay content--12 to 18 percent
Total rock fragment content--45 to 85 percent
Gravel content--15 to 50 percent
Cobble content--15 to 20 percent
Stone content--15 to 30 percent
Calcium carbonate equivalent--1 to 5 percent
Reaction--pH 7.9 to 8.0
Thickness--8 to 25 cm
2Bkq2 and 2Bkq3 horizons
Value--3 to 8 dry or moist
Chroma--2 or 4 dry or moist
Clay content--8 to 18 percent
Total rock fragment content--45 to 90 percent
Gravel content--15 to 55 percent
Cobble content--15 to 60 percent
Stone content--15 to 25 percent
Calcium carbonate equivalent--10 to 30 percent
Reaction--pH 8.0 to 8.4
COMPETING SERIES:
Clementsville,
Eganroc,
Firading--moderately deep to lithic contact
Levengood,
Meegernot--more than 18 percent clay in particle-size control section
Polumar--deep to lithic contact
Raynoldson--no silica coatings; loamy sand and sandy loam in calcic horizon
Spearhead--ustic soil moisture regime
GEOGRAPHIC SETTING:
Elevation--1710 to 2010 m
Mean annual precipitation--400 to 575 mm
Mean annual air temperature--2.8 to 5.0 degrees C
Frost-free period--40 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--5 to 50 um/sec
USE AND VEGETATION:
Major uses--rangeland, wildlife habitat
Potential natural vegetation--mountain big sagebrush, antelope bitterbrush, Idaho fescue, prairie Junegrass, bluebunch wheatgrass, needle and thread, bluegrass, buckwheat, pussytoes, and sego lily
DISTRIBUTION AND EXTENT: Small extent in southeastern Idaho; MLRA 13
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clark County, Idaho; 2018
REMARKS:
Diagnostic horizons and other features recognized in this pedon
Mollic epipedon--zone from the surface to a depth of 50 cm (A1, A2, and 2AB horizons)
Calcic horizon--zone from 76 to 150 cm (2Bkq2 and 2Bkq3 horizons)
Particle size control section--zone from 25 to 100 cm (part of A2 horizon, 2AB and 2Bkq1 horizons, part of 2Bkq2 horizon)
Taxonomic version--Twelfth Edition, 2014
ADDITIONAL DATA:
Laboratory data--pedon number S2005ID033001; Kellogg Soil Survey Laboratory, Lincoln, NE
National Cooperative Soil Survey
U.S.A.