LOCATION RAMPARTER WAEstablished Series
TAXONOMIC CLASS: Ashy-pumiceous, glassy, frigid Typic Vitrixerands
TYPICAL PEDON: Ramparter ashy very fine sandy loam - in area of 1970 burn, forest regeneration, on a 7 percent northeast facing shoulder at an elevation of 4,400 feet. (Colors are for dry soil unless otherwise stated. All textures are apparent field textures.)
Oi--0 to 1 inch; slightly decomposed forest litter of needles, twigs and grass.
E--1 to 3 inches; white (10YR 8/1) ashy very fine sandy loam, light gray (10YR 7/2) moist; weak medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine and few fine roots; common fine and medium irregular and common coarse irregular pores; one percent pumice; neutral (pH 6.6); abrupt broken boundary. (1 to 3 inches thick)
Bw1--3 to 7 inches; light gray (10YR 7/2) ashy very fine sandy loam, brown (10YR 5/3) moist; weak medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine, common fine and few medium roots; many very fine and fine irregular pores; 5 percent pumice; neutral (pH 6.8); clear wavy boundary. (3 to 4 inches thick)
Bw2--7 to 11 inches; very pale brown (10YR 7/4) paragravelly ashy fine sandy loam, yellowish brown (10YR 5/4) moist; weak medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine, fine and medium roots; many very fine irregular pores; 30 percent pumice; neutral (pH 6.6); gradual wavy boundary. (3 to 5 inches thick)
Bw3--11 to 16 inches; very pale brown (10YR 7/4) very paragravelly ashy sandy loam, yellowish brown (10YR 5/4) moist; weak medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine, fine and medium roots; many very fine and fine irregular pores; 55 percent pumice; slightly acid (pH 6.4); clear wavy boundary. (3 to 5 inches thick)
C1--16 to 25 inches; white and very pale brown (10YR 8/2 and 8/4) paragravel, brownish yellow and very pale brown (10YR 6/8 and 8/3) moist; single grain; loose, nonsticky and nonplastic; common very fine and fine roots; many fine and medium irregular pores; 80 percent pumice; neutral (pH 6.6); gradual wavy boundary. (6 to 10 inches thick)
C2--25 to 36 inches; reddish yellow and white (7.5YR 8/6 and 10YR 8/2) paragravel, reddish yellow and pink (7.5YR 6/8 and 7/4) moist; single grain; loose, nonsticky and nonplastic; few fine and very fine roots; many fine and medium irregular pores; 75 percent pumice; neutral (pH 6.6); abrupt smooth boundary. (8 to 12 inches thick)
2C3--36 to 47 inches; light gray and very pale brown (10YR 7/1 and 8/4) ashy sand, gray and yellowish brown (10YR 6/1 and 5/6) moist; single grain; loose, nonsticky and nonplastic; many very fine, fine and medium roots; many fine and medium irregular pores; 3 percent pumice; slightly acid (pH 6.4); abrupt smooth boundary. (5 to 11 inches thick)
3C4--47 to 54 inches; white and very pale brown (10YR 8/2 and 8/4) paragravel, light red (2.5YR 7/4 and 7/6) moist; single grain; loose, nonsticky and nonplastic; few fine and very fine roots; many medium and coarse irregular pores; 75 percent pumice; neutral (pH 6.6); abrupt smooth boundary. (7 to 11 inches thick)
4Bwb--54 to 61 inches; very pale brown (10YR 7/3) sandy loam, yellowish brown and gray brown (10YR 5/6 and 5/2) moist; weak medium subangular blocky structure; loose, very friable, nonsticky and nonplastic; common fine and very fine roots; many very fine irregular pores; 10 percent pebbles; neutral (pH 6.6).
TYPE LOCATION: Chelan County, Washington; about 3 miles north of Brief, 1,750 feet north and 2,000 feet east of the southwest corner of section 22, T. 22N., R. 19E.
RANGE IN CHARACTERISTICS: The average annual soil temperature at 20 inch depth is estimated to be 43 to 46 degrees F. These soils are usually moist, but are dry in all parts of the moisture control section for 60 to 75 consecutive days following summer solstice. The 0 to 40 inch particle-size control section has an estimated moist bulk density of 0.60 to 0.85 g/cc, volcanic glass content of more than 60 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 1.0 to 2.0 percent, 15-bar water retention of 5 to 12 percent for air dried samples and averages 35 to 65 percent pumice and ranges from 15 to 95 percent pumice. Reaction is slightly acid or neutral throughout.
The C horizon has value of 6 to 8 when dry, 3 to 7 when moist, and chroma of 1 or 2 when dry or moist.
The Bw horizon has value of 6 or 7 when dry, 3 to 5 when moist, and chroma of 2 to 4 when dry or moist. It is very fine sandy loam, very paragravelly ashy sandy loam, paragravelly ashy sandy loam, very paragravelly ashy fine sandy loam, extremely paragravelly ashy sandy loam or paragravelly ashy fine sandy loam.
The C, 2C and 3C horizons have hue of 10YR or 2.5Y, value of 6, 7 or 8 when dry, 5 to 8 when moist, and chroma of 1 to 8 when dry or moist. They average 50 to 95 percent pumice. Thin lenses of volcanic sand size ash occur in some profiles.
The 4Bwb horizon has value of 6 or 7 when dry, 5 or 6 when moist, and chroma of 2 to 6 when dry or moist. It contains 0 to 15 percent pumice.
COMPETING SERIES: These are the Choralmont and Palmich series. Choralmont soils contain rhyolite gravel in the control section and are dry for 45 to 60 days following summer solstice. Palmich soils are dry for 75 to 90 consecutive days
GEOGRAPHIC SETTING: Ramparter soils are on mountainsides and in valleys. Some areas have been glaciated. Slopes are 5 to 90 percent. These soils formed in volcanic ash and pumice underlain by granodiorite or glacial till. Elevations are 2,500 to 5,800 feet. The climate is characterized by warm, dry summers and cool, moist winters. The average annual precipitation is about 30 to 40 inches; the average annual temperature is about 42 to 45 degrees F. The growing season at 28 degrees F. is about 130 to 170 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Choralmont and Palmich series and the Angle, and McCree series. McCree soils have more than 35 percent rock fragments in the control section. Angle soils contain less than 60 percent pyroclastic material in the control section.
DRAINAGE AND PERMEABILITY: Well drained; slow to rapid runoff; moderate over rapid permeability.
USE AND VEGETATION: Woodland, wildlife habitat, watershed, and recreation. Native vegetation is Douglas-fir and ponderosa pine with an understory of ceanothus, pinegrass, pachystima, and elk sedge.
DISTRIBUTION AND EXTENT: North Central Chelan County, Washington; MLRA 6. Series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Chelan County (Entiat area), Washington, l97l.
REMARKS: Diagnostic horizons and features recognized in this pedon a cambic horizon from 3 to 16 inches, and a particle-size control section from 1 to 41 inches that averages 52 percent pumice. Family classification of this soil is ashy from 1 to 11 inches, ashy-pumiceous from 11 to 16 inches, pumiceous from 16 to 36 inches, and ashy from 36 to 41 inches. This soil has been placed into the ashy-pumiceous family for interpretations and because the weighted average percent pumice in the 1 to 41 inches control section is 52 percent
ADDITIONAL DATA: Laboratory data is available for this pedon NSSL pedon number 87P759.