LOCATION LOZINTA AZEstablished Series
TAXONOMIC CLASS: Ashy-skeletal over fragmental or cindery, mixed, mesic Vitrandic Haplustepts
TYPICAL PEDON: Lozinta extremely gravelly loam - rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 2 inches; brown (10YR 4/3) extremely gravelly loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; slightly hard, very friable; many very fine roots; many very fine tubular pores; 70 percent cinders; neutral (pH 7.3); abrupt smooth boundary. (1 to 4 inches thick)
Bw1--2 to 10 inches; brown (10YR 4/3) extremely gravelly loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure; slightly hard, very friable; many fine roots; many very fine tubular pores; 70 percent cinders; slightly alkaline (pH 7.6); clear wavy boundary. (4 to 20 inches thick)
Bw2--10 to 24 inches; brown (10YR 5/3) extremely gravelly loam, very dark grayish brown (10YR 3/2) moist; moderate fine subangular blocky structure; slightly hard, very friable; few fine roots; many very fine tubular pores; 70 percent cinders; neutral (pH 7.2); abrupt irregular boundary. (9 to 18 inches thick)
2C--24 to 60 inches; black cinders; few very fine roots.
TYPE LOCATION: Mohave County, Arizona; about 6 miles east of Mount Trumbull; 1,700 feet west and 1,600 feet south of the northeast corner of section 20, T. 34 N., R. 8 W.
RANGE IN CHARACTERISTICS:
Soil Moisture: Intermittently moist in some part of the soil moisture control section during July-September and December-February. Driest during May and June. Aridic ustic soil moisture regime.
Rock Fragments: 65 to 80 percent cinders in the control section
Cinder lag on the surface: 0 to 2 inches thick
Depth to Cinders: 20 to 40 inches
A horizon
Hue: 10YR, 7.5YR, 5YR
Value: 4 through 6 dry, 3 or 4 moist
Chroma: 2 through 4, dry or moist
Reaction: neutral to moderately alkaline
B horizon
Hue: 10YR, 7.5YR, 5YR
Value: 4 through 6 dry, 3 or 4 moist
Chroma: 2 through 4, dry or moist
Effervescence: noneffervescent to violently effervescent; occurring as discontinuous irregular calcium carbonate veins, filaments or disseminated
Calcium carbonate: 0 to 10 percent calcium carbonate equivalent
Reaction: neutral to moderately alkaline
COMPETING SERIES: This is the Wutoma (AZ) series. Wutoma soils have cinders at depths of 10 to 20 inches.
GEOGRAPHIC SETTING: Lozinta soils are at elevations of 5,800 to 7,200 feet on cinder cones. Slopes range from 1 to 60 percent. The soil formed in slope alluvium derived dominantly from pyroclastics and cinders. The climate is warm and semi-arid. The mean annual precipitation is 13 to 18 inches occurring as summer thunderstorms and winter rain and snow. Mean annual air temperature is 45 to 53 degrees F. The frost-free period is 110 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Hatknoll, Moab and the competing Wutoma soils. Hatknoll soils are clayey and Moab soils have a calcic horizon.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; low runoff; moderate or moderately rapid permeability.
USE AND VEGETATION: Used mainly for livestock grazing and wildlife habitat. Vegetation is galleta, Mormon tea, blue grama, big sagebrush and Indian ricegrass.
DISTRIBUTION AND EXTENT: Northern Arizona. This soil is of minor extent. MLRA 35 & 39.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Mohave County, Arizona; Soil survey of Mohave County Area, AZ, Northeastern Part, and Part of Coconino County; 1992.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 2 inches (A horizon)
Cambic horizon - The zone from 2 to 24 inches (Bw1, Bw2 horizons)
Cinder deposit at a depth of 24 inches
Vitrandic subgroup - no available data in support of the subgroup other than known coarse fragment composition and correlator experience with Andisols