LOCATION WODOMONT AZEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Lithic Calciustepts
TYPICAL PEDON: Wodomont extremely cobbly loam - woodland. (Colors are for dry soil unless otherwise noted.)
A--0 to 3 inches; brown (7.5YR 5/3) extremely cobbly loam, brown (7.5YR 4/3) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; common very fine roots; common very fine irregular pores; 30 percent cobble and 50 percent gravel as surface lag layer; strongly effervescent; slightly alkaline (pH 7.5); abrupt wavy boundary. (1 to 3 inches thick)
Bk1--3 to 12 inches; brown (7.5YR 5/4) extremely cobbly loam, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and plastic; many very fine roots; common very fine tubular pores; 50 percent cobble and 20 percent gravel; common thin calcium carbonate coatings and pendants under rock fragments; violently effervescent; slightly alkaline (pH 7.5); abrupt wavy boundary. (5 to 10 inches thick)
Bk2--12 to 15 inches; light brown (7.5YR 6/4) very gravelly loam, brown (7.5YR 4/4) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and plastic; few very fine roots; few very fine tubular pores; 35 percent gravel and 15 percent cobble; common medium soft calcium carbonate masses on peds and common thin coatings and pendants on rock fragments; violently effervescent; slightly alkaline (pH 7.8); abrupt wavy boundary. (1 to 5 inches thick)
R--15 inches; limestone; fractured and slightly weathered in upper 1 inch.
TYPE LOCATION: Coconino County, Arizona; on the Havasupai Indian Reservation; approximately 500 feet west and 2000 feet north of the southeast corner of Section 9, T. 32 N., R. 2 W.; about 1 mile southeast of Topocoba Hilltop trailhead.
RANGE IN CHARACTERISTICS:
Soil Moisture: Intermittently moist in some part of the soil moisture control section during July - September and December - March. Over half of the precipitation occurs during the winter months. Driest during May and June. Aridic ustic soil moisture regime.
Soil Temperature: 50 to 59 degrees F.
Depth to bedrock: 6 to 20 inches
Calcium carbonate equivalent: ranges from 15 to 50 percent, averages 20 to 40 percent
Rock fragments: averages 35 to 60 percent in the control section
A horizon
Hue: 5YR, 7.5YR
Value: 3 through 5, dry or moist
Chroma: 3 or 4, dry or moist
Lag layer of 65 to 90 percent gravel and/or channers on the surface
Bk horizon
Hue: 5YR, 7.5YR
Value: 4 through 6 dry, 3 or 4 moist
Chroma: 3 or 4, dry or moist
Texture: fine sandy loam, very fine sandy loam, loam, sandy loam, silt loam
Reaction: slightly to moderately alkaline
Rock fragments: 35 to 70 percent
Some pedons have a Bw horizon above the Bk horizon.
COMPETING SERIES: There are no competing series
GEOGRAPHIC SETTING: Wodomont soils are on undulating hills of plateaus and mesas. They formed in colluvium and residuum from calcareous sedimentary rocks. Slopes range from 2 to 45 percent. Elevations range from 4,600 to 6,200 feet. The mean annual precipitation is 14 to 18 inches. The mean annual air temperature is 48 to 57 degrees F. The frost-free period is 130 to 175 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Coconino, Deama, Disterheff, Natank, Orlie and Topocoba series. Coconino and Natank soils are moderately deep to bedrock. Deama soils have carbonatic mineralogy and a mollic epipedon. Disterheff and Orlie soils are very deep. Topocoba soils have an argillic horizon and a petrocalcic horizon at shallow depth.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability.
USE AND VEGETATION: Grazeable woodland, fuelwood and pinyon nut gathering, and wildlife habitat. The present vegetation is Utah juniper, pinyon, blue grama and muttongrass.
DISTRIBUTION AND EXTENT: Northwestern Arizona. This soil is moderately extensive. MLRA 35.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Coconino County, Arizona; Soil survey of the Hualapai-Havasupai Area, AZ, Parts of Coconino, Mohave and Yavapai Counties; 1993. Named after Mount Wodo on the Havasupai Indian Reservation.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 3 inches (A horizon)
Calcic horizon - The zone from 3 to 15 inches (Bk1, Bk2 horizons)
Lithic contact - The boundary at 15 inches (R horizon)
Classified according to Soil Taxonomy Second Edition, 1999; Keys to Soil Taxonomy Tenth Edition, 2006.