LOCATION MACAREENO NVEstablished Series
TAXONOMIC CLASS: Fine-loamy, isotic Oxyaquic Argicryolls
TYPICAL PEDON: Macareeno loam, rangeland. (Colors are for dry soil unless otherwise indicated.)
A1--O to 2 inches; dark grayish brown (10YR 4/2) loam, very dark brown (10YR 2/2) moist; strong fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine, fine and medium roots; many very fine and fine tubular and interstitial pores, 10 percent pebbles; neutral (pH 6.6); clear smooth boundary. (1 to 4 inches thick)
A12--2 to 8 inches; brown (10YR 5/3) loam, very dark grayish brown (10YR 3/2) moist; moderate medium and coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many fine through coarse roots; many fine and medium tubular pores; 10 percent pebbles; slightly acid (pH 6.4); clear smooth boundary. (3 to 10 inches thick)
Bt1--8 to 11 inches; brown (10YR 5/3) gravelly loam, dark brown (10YR 3/3) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common fine and many medium and coarse roots; common fine and medium tubular pores; few faint mottles; few fine clay films on ped faces and pores; 15 percent pebbles; 5 percent cobbles; slightly acid (pH 6.4); gradual smooth boundary. (O to 8 inches thick)
Bt2--11 to 19 inches; light yellowish brown (10YR 6/4) gravelly clay loam, dark yellowish brown (10YR 3/4) moist; weak medium angular blocky structure; hard friable, sticky and plastic; common coarse roots and few fine and medium roots; few fine and medium pores; common distinct reddish yellow (5YR 6/6) medium mottles; common thin and moderately thick clay films on ped faces and in pores; 20 percent pebbles; 5 percent cobbles; medium acid (pH 6.0); gradual smooth boundary. (5 to 15 inches thick)
Bt3--19 to 27 inches; pale brown (10YR 6/3) gravelly clay loam, brown (10YR 4/3) moist; massive, very hard, friable, sticky and plastic; common coarse, and few fine and medium roots; few ffne and medium tubular pores; common distinct reddish yellow (5YR 6/6) medium mottles; common thin and moderately thick clay films on peds and in pores; 25 percent pebbles; 5 percent cobbles; medium acid (pH 6.0); clear smooth boundary. (5 to 15 inches)
2Bt3--27 to 41 inches; pale brown (10YR 6/3) very gravelly clay loam, brown (10YR 4/3) moist; massive; very hard, friable, sticky and plastic; few very fine thru through dead roots; few fine and medium tubular pores; common, distinct reddish yellow (5YR 6/6) medium mottles; common thin and moderately thick clay films on peds and in pores; 30 percent pebbles, 5 percent cobbles; slightly acid (pH 6.4); abrupt smooth boundary. (8 to 18 inches thick)
3C--41 to 54 inches; pale brown (10YR 6/3) very cobbly loam, brown (10YR 4/3) moist; massive; very hard, friable, sticky and plastic; very few roots; few very fine and fine tubular pores; common distinct yellowish red (5YR 5/6) large mottles; 20 percent pebbles, 15 percent cobbles, 5 percent stones; slightly acid (pH 6.4).
TYPE LOCATION: Washoe County, Nevada; in the Carson Range northwest of Mt. Rose; 1,800 feet west and 1,000 feet north of the southeast corner of sec. 21, T. 18 N., R. 18 E.
RANGE OF CHARACTERISTICS: The solum is 40 to 60 inches thick. The mean annual soil temperature is 40 to 44 degrees F. The mollic epipedon is 10 to 16 inches thick. The depth to the perched water table is 12 to 24 inches in late winter and early spring. The soil is medium acid through neutral.
The A horizon has value of 4 or 5 dry, 2 or 3 moist, and chroma of 2 or 3.
The B horizon has value of 5 or 6 dry, 3 or 4 moist, and chroma of 3 or 4. The particle-size control section is 27 to 35 percent clay and 15 to 35 percent rock fragments.
COMPETING SERIES: These are the Animas and Wallrock series. Animas soils have shale at a depth of 20 to 40 inches. Wallrock soils have a continuous horizon of calcium carbonate accumulation at a depth of 40 to 48 inches.
GEOGRAPHIC SETTING: Macareeno soils are on hillsides and along drainage ways and have slopes of 8 to 15 percent. They formed in mixed but predominately volcanic residuum and colluvium. Elevations are 7,500 to 9,500 feet. Mean annual precipitation is 35 to 50 inches, mean annual air temperature is 40 degrees to 42 degrees F., and frost-free season is 30 to 50 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Blackwell and Carioca soils. Blackwell soils are saturated throughout. Carfoca soils have loamy-skeletal control section.
DRAINAGE AND PERMIABILITY: Somewhat drained; slow to medium runoff; slow permeability.
USE AND VEGETATION: Rangeland and recreation. Vegetation is mostly quaking aspen.
DISTRIBUTION AND EXTENT: The Sierra Nevada Mountains. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Washoe County, Nevada, South Part, 1971.
OSED scanned by NSSQA. Last revised by state on 5/81.