LOCATION PALMONT WATentative Series
TAXONOMIC CLASS: Sandy-skeletal, mixed, frigid Andic Haploxerepts
TYPICAL PEDON: Palmont cobbly ashy fine sandy loam - forested on a 70 percent slope at an elevation of 2,400 feet. (Colors are for dry soil unless otherwise stated. All textures are apparent field textures.)
Oi--0 to 1 inch; slightly undecomposed forest litter.
E--1 to 2 inches; light gray (10YR 7/2) cobbly ashy fine sandy loam, gray (10YR 5/1) moist, weak medium crumb structure; soft, very friable, nonsticky and nonplastic; many fine and medium roots; common fine and medium irregular pores; 10 percent pebbles, 10 percent pumice and 5 percent surface cobbles; neutral (pH 6.8); abrupt smooth boundary. (1/2 to 2 inches thick)
Bw--2 to 12 inches; light brownish gray (10YR 6/2) cobbly ashy fine sandy loam, dark grayish brown (10YR 4/2) moist; weak medium crumb structure; soft, very friable, nonsticky and nonplastic; many fine and medium roots; common fine and medium irregular pores; 10 percent pebbles, 5 percent cobbles, and 10 percent pumice; neutral (pH 6.8); gradual wavy boundary. (8 to 12 inches thick)
2BC--12 to 25 inches; light gray (10YR 7/2) very gravelly loamy sand, light brownish gray (10YR 6/2) moist, weak medium crumb structure; soft, very friable, nonsticky and nonplastic; common fine and medium roots; common fine and medium irregular pores; 30 percent pebbles, 10 percent cobbles, 5 percent stones, and ;15 percent pumice; neutral (pH 7.0); gradual wavy boundary. (12 to 14 inches thick)
2C--25 to 61 inches; light gray (10YR 7/2) very gravelly loamy sand, light brownish gray (10YR 6/2) moist, single grain; loose, nonsticky and nonplastic; few fine roots; few fine and medium irregular pores; 20 percent pebbles, 10 percent cobbles, 5 percent stones, and 20 percent pumice neutral (pH 7.2).
TYPE LOCATION: Chelan County, Washington; about 5 miles west of Manson in First creek; 1,500 feet south and 200 feet west of northeast corner of sec. 1, T. 27 N., R. 20 E.
RANGE IN CHARACTERISTICS: These soils are usually moist but are dry in all parts in the moisture control section for 60 to 75 days following the summer solstice. The particle-size control section averages 35 to 60 percent lithic rock fragments and 10 to 25 percent pumice. The upper 7 to 14 inches of the soil has an estimated moist bulk density of 0.75 to 0.95 g/cc, volcanic glass content of 30 to 60 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 1.0 to 2.0 percent and 15-bar water retention of 5 to 12 percent for air dried samples. Reaction is slightly acid to neutral.
The E horizon has value of 6 through 8 dry, 4 through 6 moist, and chroma of 1 or 2 dry or moist.
The Bw horizon has value of 5 through 7 dry, 3 through 6 moist, and chroma of 2 through 4 dry or moist. Texture is gravelly fine sandy loam, very gravelly fine sandy loam or very gravelly sandy loam.
The 2BC horizon has value of 5 to 7 dry, 3 to 6 moist, and chroma of 3 to 4 moist and dry. Texture is very gravelly sandy loam, very cobbly loamy sand, or very gravelly loamy sand.
The 2C horizon has value of 6 or 7 dry, 4 through 6 moist, and chroma of 1 through 3 dry or moist. Texture is extremely cobbly loamy sand, very cobbly loamy sand, or very gravelly loamy sand.
COMPETING SERIES: These are the Kiehl and Kladnick series. Kiehl and Kladnick soils have less than 10 percent pumice in the particle-size control section. Kiehl soils are dry for 75 to 90 consecutive days and Kladnick soils for 45 to 60.
GEOGRAPHIC SETTING: Palmont soils are on mountainsides that generally have a north aspect. Slopes are 30 to 90 percent. These soils formed in colluvium from rhyolite and granodiorite with a mantle of volcanic ash and pumice. Elevations are 2,200 to 5,300 feet. The climate is characterized by warm, dry summers and cold, moist winters. The average annual precipitation is 25 to 35 inches. The average January temperature is 42 degrees F., average July temperature is 65 degrees F., average annual air temperature is about 42 degrees F. The frost-free season is 80 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the McCree, Palmich, Thow, and Tyee soils. McCree soils are loamy-skeletal. Palmich soils are cindery. Thow soils are ashy. Tyee soils are shallow.
DRAINAGE AND PERMEABILITY: Well drained; rapid and very rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Woodland, wildlife habitat, watershed, and recreation.
DISTRIBUTION AND EXTENT: Central Chelan County, Washington. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Chelan County, Washington, 1986.
REMARKS: Diagnostic horizons and features recognized in this pedon are an albic horizon from 1 to 2 inches and a cambic horizon from 2 to 12 inches that has andic soil properties, and a particle-size control section from 11 to 41 inches that averages 39 percent lithic rock fragments.
This series reclassified 1/00 based on revisions to Soil Taxonomy from Andic Xerochrepts to Andic Haploxerepts.