LOCATION CODQUIN UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, calcareous, frigid, shallow Typic Xerorthents
TYPICAL PEDON: Codquin gravelly sandy loam--rangeland. (Colors are for air-dry soil unless otherwise stated.)
A--0 to 4 inches; white (2.5Y 8/2) gravelly sandy loam, light brownish gray (2.5Y 6/2) moist; single grain; soft, very friable, slightly plastic; few very fine, fine, and medium roots; many very fine interstitial and few very fine and fine tubular pores; 20 percent pebbles; slightly calcareous; carbonates are disseminated; moderately alkaline (pH 8.0); clear smooth boundary. (3 to 7 inches thick)
C--4 to 17 inches; very pale brown (10YR 7/3) extremely gravelly sandy loam, pale brown (10YR 6/3) moist; single grain; soft, very friable; common very fine, fine, medium and few coarse roots; 85 percent pebbles arranged in a platy rock structure; moderately calcareous; carbonates are disseminated; strongly alkaline (pH 9.0); clear irregular boundary. (7 to 13 inches thick)
Cr--17 inches; highly fractured tuffaceous sandstone.
TYPE LOCATION: Box Elder County, Utah; about 2 miles north of the town of Grouse Creek; about 2,400 feet west and 1,500 feet south of the northeast corner of sec. 15, T. 12 N., R. 18 W.
RANGE IN CHARACTERISTICS: Depth to soft conglomerate or tuffaceous sandstone ranges from 10 to 20 inches. The particle-size control section averages 6 to 18 percent clay and more than 60 percent rock fragments. The mean annual soil temperature ranges from 43 to 47 degrees F. The mean summer temperature ranges from 61 to 65 degrees F. The soil moisture control section is dry in all parts for 45 or more consecutive days within the four months that follow the summer solstice in most years. They are moist in some or all parts the rest of the time.
The A horizon has hue of 10YR or 2.5Y, value of 6 to 8 dry, 4 to 6 moist, and chroma of 2 or 3. Reaction is mildly alkaline or moderately alkaline and slightly calcareous or moderately calcareous. Rock fragments are dominantly pebbles.
The C horizon has hue of 10YR or 2.5Y, value of 7 or 8 dry, 5 or 6 moist, and chroma of 2 to 3. Reaction is mildly alkaline to strongly alkaline and slightly calcareous to strongly calcareous. Rock fragments are dominantly pebbles.
COMPETING SERIES: Redcan is the only other series in this family. Soils in similar families or subgroups include the Emigration, Promo, Puett and Solak series. Redcan soils have hue of 2.5YR or 10R throughout the profile. The Emigration, Promo and Solak soils have lithic contact at depths of less than 20 inches. In addition, the Promo and Solak soils border an aridic soil moisture regime and the Promo soils are mesic. Puett soils are mesic and average less than 35 percent rock fragments in the particle-size control section.
GEOGRAPHIC SETTING: Codquin soils are on steep hillsides of foothills and dissected fans. Slopes range from 15 to 60 percent. The soils formed in colluvium derived dominantly from tuffaceous sandstone and conglomerate. Elevations range from 5,300 to 6,500 feet. The mean annual temperature is 41 to 45 degrees F., and the average annual precipitation is about 13 to 16 inches. Freeze-free period is 80 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Brobett,
Dahar,
Plegomir,
Raftriver and
Vicking soils. Brobett, Dahar and Raftriver soils are moderately deep to a duripan and are on gently sloping
to moderately steep hillsides and summits. Plegomir soils are shallow to a duripan, have less than 35 percent rock fragments in the particle-size control section, and are on gently sloping fan terraces. Vicking soils are very deep, have less than 35 percent rock fragments in the particle-size control section and are on alluvial fans and hillsides.
DRAINAGE AND PERMEABILITY: Well drained; rapid runoff; rapid permeability.
USE AND VEGETATION: These soils are used for rangeland. Native vegetation is Utah juniper, bluebunch wheatgrass, Wyoming big sagebrush and Indian ricegrass.
DISTRIBUTION AND EXTENT: Codquin soils are in northwestern Utah. They are moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Box Elder County, Utah (Western Part) 1985. The named was coined.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface of the soil to aproximately 4 inches (A horizon).
Xeric moisture regime - moisture comes when the soils are cool.
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.