LOCATION CEBOLLETA NMEstablished Series
TAXONOMIC CLASS: Clayey-skeletal, mixed, superactive, frigid Typic Argiustolls
TYPICAL PEDON: Cebolleta cobbly loam--woodland. (Colors are for dry soil unless otherwise noted.)
Oi--1 to 0 inch; pine needles and oak leaves; abrupt smooth boundary. (0 to 2 inches thick)
A--0 to 4 inches; very dark grayish brown (10YR 3/2) cobbly loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; soft, very friable, nonsticky and nonplastic; few medium, common fine and very fine roots; few very fine pores; 2 percent stones, 15 percent cobbles and 5 percent pebbles; slightly acid; abrupt smooth boundary. (4 to 6 inches thick)
BA--4 to 10 inches; dark grayish brown (10YR 4/2) very cobbly loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; soft, very friable, nonsticky and slightly plastic; common coarse, fine and very fine roots; common very fine tubular pores; 30 percent cobbles and 5 percent pebbles; neutral; abrupt smooth boundary. (4 to 6 inches thick)
Bt1--10 to 19 inches; reddish brown (5YR 5/4) very cobbly clay, reddish brown (5YR 4/4) moist; moderate medium subangular blocky structure; hard, friable, sticky and plastic; few coarse and common fine and very fine roots; common very fine tubular pores; common moderately thick clay films on faces of peds and in pores; 30 percent cobbles and 10 percent pebbles; slightly acid; clear smooth boundary. (6 to 12 inches thick)
Bt2--19 to 25 inches; brown (7.5YR 4/4) very cobbly clay, dark brown (7.5YR 3/4) moist; strong medium angular blocky structure; very hard, firm, sticky and plastic; few very fine roots; few very fine tubular pores; common moderately thick clay films on faces of peds and in pores; 25 percent cobbles and 20 percent pebbles; slightly acid; abrupt wavy boundary. (6 to 16 inches thick)
2R--25 inches; basalt.
TYPE LOCATION: Cibola County, New Mexico; 0.86 miles west of Big Lake; latitude 35 degrees, 15 minutes, 36 seconds. Longitude 107 degrees, 31 minutes, 17 seconds.
RANGE IN CHARACTERISTICS:
Soil moisture: Typic ustic moisture regime
Depth to bedrock - 20 to 40 inches
Thickness of the mollic epipedon - 8 to 15 inches
Depth to the base of the Bt horizon - 20 to 40 inches
Rock fragments in the particle-size control section - 35 to 60 percent by volume, with 0 to 5 percent stones, 20 to 30 percent cobbles and 10 to 25 percent pebbles.
A horizon
Hue: 7.5YR or 10YR
Value: 3 through 5 dry, 2 or 3 moist
Chroma: 2 or 3
Texture: very cobbly loam or cobbly loam.
Rock fragments: 25 to 45 percent rock fragments by volume, with 0 to 5 percent stones, 15 to 30 percent cobbles and 5 to 10 percent pebbles.
BA horizon
Hue: 5YR, 7.5YR or 10YR
Value: 4 or 5 dry
Chroma: 2 or 3
Texture: very cobbly loam or very cobbly clay loam.
Rock fragments: 35 to 50 percent by volume, with 0 to 5 percent stones, 30 to 35 percent cobbles and 5 to 10 percent pebbles.
Bt horizon
Hue: 5YR, 7.5YR or 10YR
Value: 4 or 5 dry and 3 or 4 moist
Chroma: 2 through 4
COMPETING SERIES: These are the Borky (MT), Rionutria (NM), Roy (MT), Shanley (MT) and Storyhill (MT) series. Borky soils have a paralithic contact of sandstone. Rionutria soils have a lithic contact of limestone. Roy, Shanley and Storyhill soils are very deep.
GEOGRAPHIC SETTING: These soils formed in windblown sediments and alluvium over basalt on hills and mesatops, at elevations of 7,500 to 9,400 feet. Slope ranges from 1 to 50 percent. The mean annual precipitation is about 18 to 24 inches and the mean annual temperature is 40 to 45 degrees F. The average frost-free period is 80 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Borrego, Charo, Microy, Raton and Trag series. Borrego and Raton soils have a lithic contact between 10 and 20 inches. Charo and Microy soils have less than 35 rock fragments in the particle-size control section and Trag soils are deep.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; slow permeability.
USE AND VEGETATION: These soils are used for wood products and livestock grazing. Principal native vegetation is Arizona fescue, blue grama, snakeweed, oak, ponderosa pine and some junipers.
DISTRIBUTION AND EXTENT: West central mountains of New Mexico. This series is of small extent. MLRA 39.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Cibola County, New Mexico, 1985.
REMARKS: Diagnostic horizon and features recognized in this pedon are:
Mollic epipedon - The zone from about 0 to 10 inches. (A, BA horizons)
Argillic horizon - The zone from about 10 to 25 inches. (Bt1 and Bt2 horizons)
Lithic contact - The occurrence of basalt at about 25 inches. (2R horizon)