LOCATION PODMOR UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, active, frigid Pachic Haploxerolls
TYPICAL PEDON: Podmor very cobbly loam-rangeland. (Colors are for air-dry soil unless otherwise noted. There is a concentration of pebbles on the surface.).
A1--0 to 3 inches; brown (10YR 5/3) very cobbly loam, very dark grayish brown (10YR 3/2) moist; moderate very fine and fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine and a few medium roots; common very fine tubular pores; 20 percent gravel, 20 percent cobbles and 2 percent stones; neutral (pH 7.0); clear smooth boundary. (3 to 8 inches thick)
A2--3 to 8 inches; brown (10YR 5/3) very gravelly loam, very dark grayish brown (10YR 3/2) moist; moderate very fine and fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine and common medium roots; common very fine tubular pores; 30 percent gravel and 10 percent cobbles; mildly alkaline (pH 7.5); clear smooth boundary. (3 to 9 inches thick)
A3--8 to 16 inches; brown (10YR 5/3) very gravelly loam, very dark grayish brown (10YR 3/2) moist; moderate very fine and fine subangular blocky structure; slightly hard, friable, slightly sticky and plastic; common very fine and fine and a few medium roots; many very fine, common fine and a few coarse tubular pores; 40 percent gravel and 15 percent cobbles; mildly alkaline (pH 7.8); clear smooth boundary. (11 to 19 inches thick)
Bw--16 to 23 inches; brown (10YR 5/3) very cobbly loam, dark brown (10YR 3/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine and a few medium roots; many very fine and fine, and common medium tubular pores; 30 percent gravel and 25 percent cobbles; mildly alkaline (pH 7.6); abrupt irregular boundary. (0 to 13 inches thick)
R--23 inches; fractured quartzite.
TYPE LOCATION: Tooele County, Utah; 6 miles southeast of the Hatch Ranch in the Onaqui Mountains; 1,300 feet west, 1,100 feet north of the southeast corner of Sec. 7, T. 7 S., R. 6 W.
RANGE IN CHARACTERISTICS: Depth to bedrock is 20 to 40 inches. The mollic epipedon is 16 to 27 inches thick. The control section averages 18 to 27 percent clay. Rock fragments of angular quartzite ranges from 35 to 70 percent. Reaction is neutral or mildly alkaline.
The mean annual soil temperature ranges from 42 to 47 degrees F. The soil moisture control section is dry for 45 to 60 consecutive days following the summer solstice.
The A horizon has value of 4 or 5 dry, 2 or 3 moist and chroma of 2 or 3. It is very gravelly loam or very cobbly loam. The A horizon has moderate very fine or fine granular structure in the upper part and weak or moderate very fine, fine or medium subangular blocky structure in the lower part.
The Bw horizon has value of 5 or 6 dry, 3 or 4 moist and chroma of 3 or 4. It is very cobbly loam or extremely cobbly loam. Some pedons have a C horizon.
COMPETING SERIES: The following series have not had a cation exchange activity class assigned:
Baldridge (OR) soils have bedrock at 40 to 60 inches.
Burgi (UT) soils have bedrock at over 60 inches.
Chambeam (OR) soils have bedrock at 40 to 60 inches.
Climine (NV) soils have bedrock at over 60 inches.
Fredonyer (CA) soils formed in basalt and andesite and are slightly acid to neutral.
Ginser (CA) soils are dry 60 or consecutive days and are 20 to 40 inches to a paralithic contact.
Glean (CA) soils have bedrock at 40 to 60 inches.
Lambring (OR) soils have bedrock at 40 inches or deeper.
Sinker (OR) soils formed in schist and graywacke.
St. Anthony (ID) soils have a 2C horizon of sand and gravel.
Webfoot (OR) soils have bedrock at 40 to 60 inches and are somewhat poorly drained.
Westbutte (OR) soils formed in basalt, tuff, and andesite and are dry for 60 to 90 consecutive days following the summer solstice.
Willynat (T NV) soils have bedrock at over 60 inches.
GEOGRAPHIC SETTING: Podmor soils are on concave to linear mountainsides at elevations of 7,000 to 10,000 feet. Soils occurring at higher elevations are generally on south aspects. The higher slopes are on southerly aspects. Slopes range from 30 to 60 percent. These soils formed in colluvium and residuum derived dominantly from quartzite. The mean annual air temperature is 40 to 45 degrees F. Average annual precipitation is 16 to 22 inches. The freeze-free period is 70 to 90 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Agassiz, Broad, Dateman, Flygare and Onaqui soils. Agassiz and Onaqui soils are less than 20 inches deep over a lithic contact. Broad soils have argillic horizons and calcic horizons. Flygare and Dateman soils have a cryic temperature regime. Flygare soils are very deep.
DRAINAGE AND PERMEABILITY: Well drained; rapid runoff; moderately permeable.
USE AND VEGETATION: These soils are used for rangeland, wildlife habitat and recreation. Principal vegetation is mountain big sagebrush, snowberry bluebunch wheatgrass and arrowleaf balsamroot.
DISTRIBUTION AND EXTENT: Western Utah. This series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Tooele Area, Utah, 1981.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone to a depth of 23 inches. (A1, A2, A3 and Bw horizons)
Lithic feature - the contact of quartzite bedrock at a depth of 23 inches.
The classification is based on the "Keys to Soil Taxonomy, Eighth Edition, 1998".