LOCATION HAZTON WY+COEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive Lithic Haplocryolls
TYPICAL PEDON: Hazton gravelly coarse sandy loam-grassland.
(Colors are for dry soil unless otherwise stated.)
A--0 to 8 inches; grayish brown (10YR 5/2) gravelly coarse sandy loam, very dark grayish brown (10YR 3/2) moist; moderate fine granular structure; soft, very friable, slightly sticky and nonplastic; many fine and very fine roots; 20 percent fine and very fine angular granitic pebbles; slightly acid (pH 6.5); clear smooth boundary. (7 to 15 inches thick)
C--8 to 17 inches; brown (10YR 5/3) gravelly coarse sandy loam, dark brown (10YR 4/3) moist; weak coarse subangular blocky structure; very hard, very friable, nonsticky and nonplastic; common fine and very fine roots throughout matrix; 25 percent fine and very fine angular granitic pebbles; slightly acid (pH 6.5); abrupt wavy boundary. (3 to 13 inches thick)
R--17 inches; hard granite bedrock.
TYPE LOCATION: Johnson County, Wyoming; SW1/4, NE1/4 of sec. 26,
T. 47 N., R. 85 W.
RANGE IN CHARACTERISTICS: The mollic epipedon ranges from 6 to 15 inches thick. Depth to the lithic contact and hard bedrock ranges from 10 to 20 inches. Organic matter content ranges from 2 to 6 percent in the surface and decreases uniformly with depth. The particle size control section is coarse sandy loam or gravelly coarse sandy loam with 5 to 18 percent clay and 50 to 80 percent sand with more than 35 percent being coarse, very coarse, and medium sand. Rock fragments range from 0 to 35 percent and consist mainly of fine and very fine angular granitic pebbles with less than 5 percent angular cobble. The mean annual soil temperature ranges from 32 to 43 degrees F., and the mean summer soil temperature ranges from 50 to 58 degrees F.
The A horizon has hue of 2.5Y or 10YR, value of 3 through 5 dry, 2 or 3 moist, and chroma of 2 or 3 moist and 2 through 4 dry. Reaction is slightly acid through mildly alkaline.
The C or Bw horizon has hue of 2.5Y through 7.5YR, value of 4 through 6 dry, 3 through 5 moist, and chroma of 2 through 4. Texture is coarse sandy loam or gravelly coarse sandy loam with 0 to 35 percent fine or very fine angular pebbles. Because of the cubical nature of the coarse and medium sands, some pedons have a very hard or extremely hard consistence when dry due to packing. Reaction is slightly acid through mildly alkaline.
COMPETING SERIES: These are the Duncom, Jenkinson, Splitro, and Trump series. Duncom and Trump soils have pedogenetic Bk horizons, 18 to 35 percent clay in the control section, and formed in materials weathered from limestone. Jenkinson soils are moderately or strongly alkaline throughout, have 18 to 35 percent clay in the control section, and formed in materials weathered from sandstone and shale. Splitro soils are very similar. They contain primarily fine, very fine, and some medium sands and formed in material weathered from sandstone.
GEOGRAPHIC SETTING: Hazton soils are on mountain slopes and ridge crests controlled by granite bedrock. They formed in residuum and colluvial slopewash weathered from coarse grained granite. Slopes 2 - Hazton Series
are 10 to 40 percent. Elevations are 6,000 to 9,000 feet. The mean annual precipitation ranges from 15 to 25 inches, and the mean annual temperature ranges from 32 to 42 degrees F. The frost-free season is estimated to be 80 days or less depending upon elevation, aspect, and air drainage. Frost can occur at any time.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Burgess and Mathers soils. Both soils have argillic horizons. Also, the Burgess soils are moderately deep and the Mathers soils are deep with contrasting sand or gravel at 20 to 40 inches.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff depending upon slope; moderately rapid permeability.
USE AND VEGETATION: Rangeland, wildlife habitat, and recreation. Native vegetation consists of Idaho fescue, bluebunch wheatgrass, antelope bitterbrush, snowberry, and timber danthonia.
DISTRIBUTION AND EXTENT: Mountains of central and north central Wyoming. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Johnson County (southern Johnson County area), Wyoming; 1971.