LOCATION DEATMAN OREstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Pachic Ultic Haploxerolls
TYPICAL PEDON: Deatman gravelly loam, forested. (Colors are for moist soil unless otherwise noted.)
0--1 inch to 0; loose litter of undecomposed needles, twigs and leaves and partially decomposed needles, twigs and leaves.
A--0 to 5 inches; very dark grayish brown (10YR 3/2) gravelly loam, brown (10YR 5/3) dry; weak fine granular structure; soft, friable, nonsticky and nonplastic; many very fine and fine roots; many very fine pores; 20 percent pebbles; slightly acid (pH 6.0); clear wavy boundary. (3 to 10 inches thick)
Bw--5 to 13 inches; dark brown (10YR 3/3) gravelly sandy clay loam, brown (10YR 5/3) dry; weak fine and medium granular and weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine and fine roots; many very fine pores; 20 percent pebbles and 5 percent cobbles; medium acid (pH 5.7); gradual wavy boundary. (5 to 18 inches thick)
C--13 to 25 inches; very dark grayish brown (10YR 3/2) gravelly sandy clay loam, dark grayish brown (2.5Y 5/2) dry; massive; slightly hard, firm, sticky and slightly plastic; few roots; many very fine, fine and medium pores; few thin clay films in some pores; 20 percent pebbles and 10 percent cobbles; slightly acid (pH 6.2); abrupt wavy boundary. (10 to 20 inches thick)
2Cr--25 inches; semiconsolidated fractured greenish breccia bedrock.
TYPE LOCATION: Douglas County, Oregon; SE1/4 NE1/4 section 23, T. 29 S., R. 1 E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 47 to 52 degrees F. The soils are usually moist and are dry for 45 to 60 consecutive days during the four-month period following the summer solstice. Depth to a paralithic contact ranges from 20 to 40 inches. The average of rock fragments in the profile above bedrock range from 15 to 30 percent pebbles, 0 to 20 percent cobbles and 0 to 10 percent stones. The average in the control section ranges from 20 to 35 percent. Thickness of the mollic epipedon ranges from 20 to 25 inches.
The A horizon has hue of 10YR or 7.5YR, value of 2 or 3 moist, 4 or 5 dry, and chroma of 2 or 3 moist and dry.
The B horizon has hue of 10YR or 7.5YR, and chroma of 3 or 4 moist and dry. It is gravelly or cobbly loam or sandy clay loam and has 20 to 30 percent clay.
The C horizon has hue of 10YR or 2.5Y, value of 3 or 4 moist and 5 or 6 dry and chroma of 2 to 4 moist and dry. It is gravelly or cobbly loam or sandy clay loam.
The underlying bedrock ranges from grayish green, olive to olive brown.
COMPETING SERIES: This is the Tatu series. Tatu soils are broadly defined and need more study.
GEOGRAPHIC SETTING: Deatman soils are on ridgetops and hillsides in mountainous areas. Slopes dominantly are 40 to 80 percent but range from 20 to 80 percent. Elevations range from 1,500 to 4,000 feet. The soils formed in colluvium weathered from greenish tuff, breccia, and agglomerate. The mean annual precipitation ranges from 40 to 60 inches, average temperature ranges from 45 to 50 degrees F., and the frost-free season is 100 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Fives and Gustin soils. Fives soils are deep and are on the more stable slopes, dominantly less than 40 percent. Gustin soils are moderately well drained and have mottled clayey lower B horizons.
DRAINAGE AND PERMEABILITY: Well drained; medium to very rapid runoff; moderate permeability.
USE AND VEGETATION: Timber production, water supply and wildlife. Douglas-fir and sugar pine are dominant with an understory mainly of rhododendron, salal and swordfern.
DISTRIBUTION AND EXTENT: West side of central and southern Cascade Mountains, Oregon. The soil is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Douglas County, Oregon, 1975.
REMARKS: Differentiation from Tatu series needs further study. The Tatu series description is dated 1949.
ADDITIONAL DATA: Characterization data for one profile in the Soil Survey of South Umpqua Area, Oregon, 1973. Analyses by Oregon State University.