LOCATION VOCK AZEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic, shallow Ustic Haplocambids
TYPICAL PEDON: Vock very cobbly sandy loam - rangeland. (Color for dry soil unless otherwise noted).
A--0 to 6 inches; brown (10YR 4/3) very cobbly sandy loam, dark brown (10YR 3/3) moist; weak fine granular structure; slightly hard, very friable, nonsticky and nonplastic; common very fine roots; common very fine tubular pores; 20 percent gravel, 20 percent cobble, 10 percent stone; slightly alkaline (pH 7.8); abrupt smooth boundary. (4 to 6 inches thick)
Bw1--6 to 11 inches; dark yellowish brown (10YR 4/4) gravelly sandy loam, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common very fine roots matted around rock fragments; common very fine tubular pores; 25 percent gravel; slightly alkaline (pH 7.8); abrupt smooth boundary. (2 to 7 inches thick)
Bw2--11 to 16 inches; dark yellowish brown (10YR 4/4) very gravelly sandy loam, brown (10YR 4/3) moist; weak fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common fine roots; common very fine tubular pores; 45 percent gravel; moderately alkaline (pH 8.0); abrupt smooth boundary. (4 to 7 inches thick)
2Cr--16 to 60 inches; granite.
TYPE LOCATION: Mohave County, Arizona. 3 miles north-northeast of Chloride; 35 degrees, 27 minutes, 45 seconds north latitude and 114 degrees, 10 minutes, 44 seconds west longitude. About 1,600 feet east and 1,300 feet south of the northwest corner of section 23, T. 24 N., R. 18 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. Ustic aridic soil moisture regime.
Soil temperature: 54 to 57 degrees F.
Depth to paralithic contact: 10 to 20 inches
Rock fragments: averages 35 to 65 percent in the particle size control section
Reaction: slightly or moderately alkaline
Organic matter: 1 to 2 percent
Clay content: ranges from 5 to 20 percent; averages less than 18 percent
A and B horizons
Hue: 10YR, 7.5YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 3 or 4, dry or moist
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Vock series are on mountains and hills at elevations of 5,000 to 7,000 feet. These soils formed in mixed igneous and metamorphic colluvium and alluvium. Slopes range from 30 to 65 percent. The mean annual precipitation is 12 to 16 inches. The mean annual air temperature is 52 to 55 degrees F. The frost free period is 150 to 165 days.
GEOGRAPHICALLY ASSOCIATED SOILS: This is the Elements series. Elements soils are very deep.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; very high runoff; moderately rapid permeability.
USE AND VEGETATION: Used for livestock grazing and wildlife habitat. Present vegetation is turbinella oak, desert ceanothus, yellowleaf silktassel, and singleleaf pinyon.
DISTRIBUTION AND EXTENT: Northwestern Arizona. This series is of moderate extent. MLRA is 38.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Mohave County, Arizona. Soil survey of Mohave County, AZ, Central Part; 2005. The name is from a local mine.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 6 inches (A horizon)
Cambic horizon - The zone from 6 to 16 inches (Bw1, Bw2 horizons)
Paralithic contact - The boundary at 16 inches (2Cr horizon)
Classified according to Soil Taxonomy Second Edition, 1999; Keys to Soil Taxonomy Tenth Edition, 2006.