LOCATION PANHANDLE WAEstablished Series
TAXONOMIC CLASS: Ashy-pumiceous, glassy, nonacid Vitrandic Cryorthents
TYPICAL PEDON: Panhandle extremely paragravelly loamy sand, on a 10 percent northfacing slope at an elevation of 3,600 feet. (Colors are for moist soils unless otherwise stated)
C1--0 to 10 inches; light gray (10YR 7/1) extremely paragravelly loamy sand, white (10YR 8/1) dry, single grain; loose, nonsticky and nonplastic; many medium and coarse irregular pores; 50 percent pumice fragments and 15 percent pebbles; moderately alkaline (pH 8.2); clear smooth boundary. (8 to 12 inches thick)
C2--10 to 60 inches; grayish brown (10YR 5/2) very paragravelly loamy sand, light gray (10YR 7/2) dry, single grain; loose, nonsticky and nonplastic; many fine medium coarse irregular pores; 35 percent pumice fragments and 10 percent pebbles; moderately alkaline (pH 7.8).
TYPE LOCATION: Skamania County, Washington, about 1.5 miles southwest of Spirit Lake, 1,000 feet south and 1,750 feet east of the northwest corner of sec. 21, T. 9 N., R. 5 E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 38 to 43 degrees F. The particle-size control section averages 35 to 70 percent pumice fragments. It is moderately alkaline to neutral. The soil is 60 percent or more by weight vitric volcanic ash and pumice cinders.
The C1 horizon has value of 4 to 7 moist, 5 to 8 dry, and chroma of 1 or 2 moist and dry.
The C2 horizon has hue of 7.5YR to 10YR, value of 4 to 6 moist, 5 to 8 dry, and chroma of 0 to 2 moist and dry.
COMPETING SERIES: There are no competing series. The Kweo, Lapine, and Maklak series. Kweo and Lapine soils have a xeric moisture regime and an A horizon.
GEOGRAPHIC SETTING: The Panhandle soils are on broad fans at elevations of 2,900 to 5,000 feet. Panhandle soils formed in cindery pyroclastic flow material from the May 18, 1980 and subsequent eruptions of Mt. St. Helens. The climate is characterized by warm, moist summers and cold, wet winters. Mean annual precipitation is 130 to 140 inches including considerable snowfall. Average January temperature is 25 degrees F; average July temperature is 59 degrees F; and the mean annual temperature is 38 to 43 degrees F. The frost-free season is 70 to 90 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Studebaker and Obscurity soils. These soils are sandy-skeletal.
DRAINAGE AND PERMEABILITY: Well drained, slow runoff; moderately rapid permeability.
USE AND VEGETATION: Used for watershed and a National Geologic Monument. Vegetation is absent. The soil is assumed to be able to support lodgepole pine forest.
DISTRIBUTION AND EXTENT: Northern Skamania County, Washington. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Skamania County, Washington, 1984.
ADDITIONAL DATA: This pedon has partial lab data S81WA-059-8. This pedon has no diagnostic horizons.
REMARKS:
Classification changed 6/98 based on revisions to Soil Taxonomy.
Dignostic features included in this pedon:
Vitrandic feature: from soil surface to 60 inches with greater than 35 percent pumice fragments.
Particle-size control section: from 10 to 40 inches.