LOCATION PATIO UT+ID OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Ultic Haploxerolls
TYPICAL PEDON: Gravelly loam, rangeland. (Colors are for moist soil unless otherwise noted.)
O1-- 1 to 0 inch; decaying leaves, twigs, etc., about 60 percent of surface covered.
All--O to 9 inches, very dark brown (10YR 2/2) gravelly loam, dark brown (10R 3/3) dry; weak fine and medium granular structure; soft, friable, slightly sticky and slightly plastic; many very fine, fine and few medium and coarse roots; 40 percent pebbles; slightly acid (pH 6.2); clear smooth boundary. (4 to 9 inches thick)
A12--9 to 13 inches, dark brown (10YR 3/3) gravelly heavy loam, brown (10YR 4/3) dry; weak fine and medium subangular blocky structure that parts to weak fine and medium granular; slightly hard, friable, slightly sticky and plastic; many very fine, fine, and few medium coarse roots; 40 percent pebbles- slightly acid (pH 6.2); clear wavy boundary. (0 to 8 inches thick)
B2--13 to 26 inches, dark yellowish brown (10YR 4/4) very gravelly clay loam, yellowish brown (10YR 5/4) dry; weak fine and medium subangular blocky structure; hard, firm, sticky and plastic; few fine, medium and coarse roots; common very fine and fine pores; 55 percent gravel; slightly acid (pH 6.2); abrupt irregular boundary. (10 to 24 inches thick)
R--26 inches, fractured phyllite and argillite.
TYPE LOCATION: Weber County, Utah; 1/2 mile south and 1 mile west of Utaba Dam; 1,000 feet east and 500 feet north of SW corner of sec. 35, T.8N., R.IW.
RANGE IN CHARACTERISTICS: Depth to bedrock ranges from 20 to 35 inches. Base saturation is less than 75 percent in some part of the upper 30 inches or above the bedrock. The mean annual soil temperature at a depth of 20 inches ranges from 45 to 47 degrees F. The mean summer temperature ranges from 60 degrees to 66 degrees F. The soils are usually moist but are dry for 50 to 80 consecutive days during the summer. Rock fragments consist of angular argillite, phyllite and schist pebbles and cobbles, and range from 20 to 40 percent in the Al horizon and 55 to 70 percent in the B2 horizon.
The Al horizon has hue of 10YR or 7.5YR, value of 3 through 5 dry, 2 or 3 moist, and chroma of 2 or 3 moist. It is slightly acid to neutral and is 8 to 13 inches thick.
The B2 horizon has hue of 7.5YR through 2.5Y, value of 5 or 6 dry, and chroma of 3 or 4 dry and moist. It ranges from very gravelly heavy loam or light clay loam to very cobbly light clay loam. Structure ranges from weak to moderate, fine to coarse subangular blocky. This horizon is slightly acid to medium acid and is 10 to 24 inches thick.
COMPETING SERIES: These are the Bradshaw, Family (t), Lamondi, Mud Springs and St. Marys series. Bradshaw, Mud Springs and St. Marys soils have more than 75 percent base saturation throughout the upper 30 inches. Emily soils have contrasting texture change to loamy sand at depth of about 19 inches and are more than 40 inches deep to bedrock. Lamondi soils have a mollic epipedon more than 20 inches thick and are more than 40 inches to bedrock.
GEOGRAPHIC SETTING: Patio soils are at elevations of 5,200 to 7,000 feet. They dominantly occur on south and east facing mountain slopes. Slopes range from 40 to 60 percent. These soils formed in residuum and colluvium weathered from argillite, phyllite, and schist. The climate is moist subhumid, and the average annual precipitation ranges from 20 to 25 inches. The mean annual temperature is 43 to 45 degrees F. The mean summer temperature is 56 to 62 degrees F., and the frost-free period ranges from 80 to 90 days.
ASSOCIATED SOILS: These are the Durfee and Nordic soils and the competing Lamondi soils. All of these soils are more than 40 inches deep. Durfee and Nordic soils have argillic horizons.
DRAINAGE AND PERMEABILITY: Well drained; rapid runoff; moderate permeability.
USE AND VEGETATION: Patio soils are used for watershed, range and wildlife habitat. The present native vegetation is Gambel oak, mulesear dock, bluebunch wheatgrass, slender wheatgrass, lupine and balsamroot.
DISTRIBUTION AND EXTENT: Northern Utah. This series is inextensive.
MLRA OFFICE RESPONSIBLE: Lakewood, Colorado
SERIES ESTABLISHED: Weber County, Morgan Area, Utah, 1974.
OSED scanned by NSSQA. Last revised by state 11/74.
REMARKS:
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.