LOCATION LAMONDI UT+IDEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Pachic Ultic Haploxerolls
TYPICAL PEDON: Lamondi stony loam, rangeland. (Colors are for moist soil unless otherwise noted.)
A11--0 to 3 inches; very dark brown (10YR 2/2) stony loam, dark grayish brown (10YR 4/2) dry; weak fine granular structure; soft, friable, slightly sticky and plastic; many very fine and fine roots; 20 percent gravel; 3 percent of surface covered by stones; slightly acid (pH 6.4); abrupt smooth boundary. (3 to 8 inches thick)
A12--3 to 10 inches; very dark brown (10YR 2/2) cobbly loam, dark grayish brown (10YR 4/2) dry; weak medium and coarse subangular blocky structure that parts to weak fine granular; slightly hard, friable, slightly sticky and plastic; common fine and very fine roots; few fine and very fine pores; 10 percent cobbles, 10 percent pebbles; slightly acid (pH 6.3); gradual smooth boundary. (6 to 12 inches thick)
A13--10 to 21 inches; very dark grayish brown (10YR 3/2) cobbly loam, brown (10YR 4/3) dry; weak fine subangular blocky structure that parts to weak fine and medium granular; slightly hard, friable, slightly sticky and plastic; common fine and very fine and few medium roots; common fine and very fine pores; 15 percent cobbles, 5 percent pebbles, 30 percent stones; slightly acid (pH 6.2); clear smooth boundary. (12 inches thick)
B21--21 to 36 inches; dark yellowish brown (10YR 4/4) very cobbly heavy loam, light yellowish brown (10YR 6/4) dry; moderate fine and medium subangular blocky structure; hard, firm, sticky and plastic; few very fine, fine, and medium roots; many very fine pores; 25 percent cobbles, 15 percent pebbles, 30 percent stones; medium acid (pH 6.0); clear smooth boundary. (7 to 20 inches thick)
B22--36 to 52 inches; yellowish brown (10YR 5/4) very cobbly heavy loam, light yellowish brown (10YR 6/4) dry; weak fine and medium subangular blocky structure; hard, firm, sticky and plastic; few very fine and fine roots; many very fine pores; 35 percent cobbles, 15 percent pebbles, 30 percent stones; medium acid (pH 5.8); clear smooth boundary. (12 to 20 inches thick)
C--52 to 61 inches; dark yellowish brown (10YR 4/4) very gravelly loam, light yellowish brown (10YR 6/4) dry; weak medium subangular blocky structure; hard, firm, sticky and plastic; few very fine roots; common very fine and fine pores; few thin clay films; 65 percent gravel; medium acid (pH 5.8).
TYPE LOCATION: Weber County, Utah; 1 1/2 miles south of Liberty; 1,000 feet west and 700 feet south of the E1/4 corner sec. 29, T.7N., R.1E.
RANGE IN CHARACTERISTICS: The mollic epipedon is 20 to 26 inches thick. Textures in the 10 to 40 inch section are gravelly, cobbly, very gravelly or very cobbly loam, clay loam or sandy clay loam, averaging 20 to 30 percent clay and 35 to 65 percent rock fragments. Base saturation (by sum of cations) is less than 75 percent in some part or throughout the upper 30 inches. The mean annual soil temperature at depth of 20 inches ranges from 43 degrees to 47 degrees F. The mean summer temperature ranges from 64 degrees to 69 degrees F. The soils are usually moist, but are dry for 65 to 85 consecutive days during the summer. Rock fragments consist of angular and rounded gravel, cobbles, and stones, and range from 20 to 55 percent in the A1 horizon, 45 to 70 percent in the B2 horizon, and 60 to 70 percent in the C horizon.
The A1 horizon has hue of 10YR or 7.5YR, value of 3 through 5 dry, 2 or 3 moist, and chroma of 2 through 4 dry, 2 or 3 moist. It ranges from stony loam at the surface to cobbly loam, very cobbly loam, or gravelly loam in the lower part. This horizon is medium acid to slightly acid and is 10 to 26 inches thick.
The B2 horizon has dominant hue of 10YR but has hue of 7.5YR in the lower part of some pedons, value of 4 through 6 dry, 4 or 5 moist, and chroma of 3 through 6 dry, 3 and 4 moist. It ranges from gravelly, very gravelly, cobbly to very cobbly loam, to gravelly, very gravelly, cobbly or very cobbly clay loam or very cobbly sandy clay loam. This horizon is medium to slightly acid, and ranges from 25 to 40 inches thick.
The C horizon has hue of 10YR or 7.5YR, value of 4 through 6 moist, and chroma of 3 or 4 dry and moist. It ranges from very gravelly loam or clay loam to very cobbly loam, very cobbly sandy loam, or very cobbly loamy sand and is medium or slightly acid.
COMPETING SERIES: These are the Moweba and Patio series. Moweba soils have hue of 7.5YR, 5YR, or 2.5YR in all parts of the horizons. They formed in material weathered from sandstone and quartzite conglomerate. Patio soils are moderately deep over bedrock.
GEOGRAPHIC SETTING: Lamondi soils are at elevations of 5,100 to 7,000 feet. They occur on sloping to steep alluvial fans. Slopes range from 3 to 30 percent. These soils formed in alluvium weathered from argillite, phyllite, schist and quartzite. The climate is moist subhumid, and the average annual precipitation ranges from 18 to 25 inches. The mean annual temperature is 41 to 45 F. The mean summer temperature is 60 degrees to 65 degrees F., and the frost-free period ranges from 70 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brownlee, Nordic and Poleline soils and the competing Patio soils. Brownlee soils have mean annual soil temperature of more than 47 degrees F., and have argillic horizons with less than 20 percent rock fragments. Nordic soils have mean summer soil temperatures less than 59 degrees F., A2 horizons and argillic horizons. Poleline soils have mean summer soil temperature less than 59 degrees F.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability.
USE AND VEGETATION: These soils are dominantly used for range. Some areas are used for housing or recreation developments. The present native vegetation is big sagebrush, oakbrush, chokecherry, mountain bromegrass, bluegrass and mulesear dock.
DISTRIBUTION AND EXTENT: Northern Utah. This series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Morgan County, Morgan Area, Utah, 1974.
OSED scanned by SSQA. Last revised by state on 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.