LOCATION GAULDY                  OR

Established Series
Rev. MHF/JAS/RWL
06/2011

GAULDY SERIES

The Gauldy series consists of very deep, somewhat excessively drained soils that formed in recent alluvium. They are on flood plains and have slopes of 0 to 7 percent. The mean annual precipitation is about 85 inches and the mean annual air temperature is about 51 degrees F.

TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, superactive, isomesic Fluventic Humudepts

TYPICAL PEDON: Gauldy loam, pasture, on a 4 percent slope at an elevation of 40 feet. (Colors are for moist soil unless otherwise noted.)

Ap--0 to 10 inches; dark brown (10YR 3/3) loam, brown (10YR 5/3) dry; moderate medium and fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many roots; many irregular pores; 10 percent medium rounded gravel; strongly acid (pH 5.2); clear smooth boundary. (10 to 17 inches thick)

Bw--10 to 26 inches; dark yellowish brown (10YR 3/4) gravelly loam, yellowish brown (10YR 5/4) dry; moderate very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many roots; many irregular pores and common coarse tubular pores; 15 percent rounded gravel; strongly acid (pH 5.4); abrupt wavy boundary. (8 to 20 inches thick)

2C1--26 to 38 inches; dark yellowish brown (10YR 3/4) extremely gravelly loamy coarse sand, yellowish brown (10YR 5/4) dry; single grain; loose, nonsticky and nonplastic; common coarse roots; many interstitial pores; 60 percent rounded gravel; strongly acid (pH 5.4); clear wavy boundary. (10 to 14 inches thick)

2C2--38 to 55 inches; dark yellowish brown (10YR 3/4) loamy fine sand, yellowish brown (10YR 5/4) dry; massive; soft, very friable, nonsticky and nonplastic; few coarse roots; many fine and medium tubular pores; 10 percent rounded gravel; strongly acid (pH 5.4); abrupt wavy boundary. (14 to 20 inches thick)

2C3--55 to 60 inches; dark grayish brown (10YR 4/2) extremely gravelly fine sand, grayish brown (10YR 5/2) dry; single grain; loose, nonsticky and nonplastic; 85 percent gravel; very strongly acid (pH 4.8).

TYPE LOCATION: Tillamook County, Oregon; about 2.3 miles northeast of Garibaldi Oregon, along Moss Creek on north side of road, 1,650 feet north and 400 feet east of the southwest corner of section 13, T. 1 N., R. 10 W.; USGS Kilchis River 7.5 minute topographic quadrangle. Latitude 45 degrees 34 minutes 17 seconds north and Longitude 123 degrees 51 minutes 41 seconds west. NAD 27.

RANGE IN CHARACTERISTICS: The mean annual soil temperature is 49 to 54 degrees F. The soil is usually moist and is dry between the depths of 4 and 12 inches for less than 45 consecutive days following the summer solstice. The thickness of the solum and depth to contrasting texture normally range from 20 to 30 inches but are as thin as 15 inches in some pedons. The umbric epipedon is 10 to 17 inches thick.

The A horizon has value of 2 or 3 moist, 3 through 5 dry, and chroma of 2 or 3 moist and dry. Texture is loam and has 15 to 18 percent clay. It has 0 to 15 percent rounded gravel and 3 to 5 percent organic matter.

The Bw horizon has value of 3 or 4 moist, 5 or 6 dry, and chroma of 4 through 6 moist and dry. Texture is loam, fine sandy loam, very fine sandy loam, or gravely loam. It has less than 18 percent clay and more than 15 percent coarser than very fine sand. It has 5 to 20 percent gravel.

The 2C horizon has hue of 10YR or 2.5Y, value of 3 through 5 moist, 5 or 6 dry and chroma of 2 through 4 moist and dry. Texture is extremely gravelly loamy fine sand, extremely gravelly loamy coarse sand, extremely gravelly fine sand, extremely cobbly loamy fine sand, extremely cobbly loamy coarse sand, extremely cobbly loamy sand, very gravelly loamy coarse sand, very gravelly fine sand, gravelly loamy coarse sand, or loamy fine sand. It has 0 to 10 percent clay and 10 to 85 percent gravel, 0 to 40 percent cobbles, and 0 to 10 percent stones and/or boulders. The 2C horizon is stratified in some pedons. The soil reaction is very strongly acid or strongly acid.

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: The Gauldy soils are on nearly level to gently undulating flood plains and have slopes of 0 to 7 percent. They formed in recent alluvium that had its source in upland soils weathered from siltstone, shale, or basalt. Elevations are 10 to 400 feet. The climate is characterized by cool wet winters and cool moist summers. Many summer days have a fog or low cloud cover during the mornings. The mean annual precipitation is 70 to 100 inches. The mean July temperature is 61 degrees F., the mean January temperature is 41 degrees F., and the mean annual temperature is 48 to 54 degrees F. The frost-free period is 160 to 300 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brenner, Nehalem, Nestucca, Yachats, and Willanch soils which all occur on flood plains. Brenner soils are fine textured and are poorly drained. Nehalem soils are fine-silty and well drained. Nestucca soils are fine-silty and somewhat poorly drained. Yachats soils are coarse loamy but lack a textural discontinuity. Willanch soils are coarse-loamy and poorly drained.

DRAINAGE AND PERMEABILITY: Somewhat excessively drained; moderately rapid permeability. The soil is subject to occasional periods of brief flooding from November through April. In some areas the soil is subject to rare or frequent periods of brief flooding from November through April.

USE AND VEGETATION: Most areas have been cleared and seeded to pasture. Native vegetation is western hemlock, Douglas fir, Sitka spruce, vine maple, salmonberry, red huckleberry, red elderberry, and western swordfern.

DISTRIBUTION AND EXTENT: Along minor streams of coastal valleys in Oregon; MLRA 4A. The soil is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Tillamook County, Oregon, 1961.

REMARKS: Diagnostic horizons and features included in this pedon:
Umbric epipedon - from surface to 10 inches (Ap horizon).
Cambic horizon - from 10 to 26 inches (Bw horizon).
Fluventic feature - irregular decrease in organic carbon based on nature of parent material.
Particle-size control section - from 10 to 40 inches (Bw, 2C1, and upper 2C2 horizons)

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National Cooperative Soil Survey
U.S.A.