LOCATION COLLIER OREstablished Series
TAXONOMIC CLASS: Ashy, glassy Xeric Vitricryands
TYPICAL PEDON: Collier ashy sandy loam, woodland. (Colors are for moist soil unless otherwise noted.)
Oi-0 to 1 inch; slightly decomposed needle litter.
A--1 to 5 inches; very dark brown (10YR 2/2) ashy sandy loam, dark yellowish brown (10YR 4/4) dry; weak fine granular structure; loose, very friable, nonsticky and nonplastic; many very fine, fine and common medium roots; many very fine interstitial pores; 5 percent pumice paragravel and 3 percent hard gravel; slightly acid (pH 6.1); clear wavy boundary. (2 to 6 inches thick)
BA--5 to 12 inches; dark brown (7.5YR 3/2) ashy loamy sand, brown (7.5YR 5/2) dry; weak fine subangular blocky structure; loose, nonsticky and nonplastic; many very fine and fine roots; many fine interstitial pores; 5 percent pumice paragravel and 3 percent hard gravel; slightly acid (pH 6.1); clear wavy boundary.
Bw--12 to 23 inches; brown (7.5YR 4/2) paragravelly ashy loamy sand, light brown (7.5YR 6/3) dry; weak fine subangular blocky structure; loose, nonsticky and nonplastic; few very fine roots; many fine interstitial pores; 15 percent pumice paragravel, 8 percent hard gravel; slightly acid (pH 6.1); clear wavy boundary. (Combined thickness of the BA and Bw horizon is 12 to 25 inches)
C--23 to 62 inches; brown (7.5YR 4/4) paragravelly ashy sand, light brown (7.5YR 6/4) dry; single grain; slightly hard, very friable, nonsticky and nonplastic; few fine roots; many fine interstitial pores; 15 percent pumice paragravel, 8 percent cinder gravel; neutral (pH 6.6).
TYPE LOCATION: Klamath County, Oregon; About 2 miles west of Sharp Peak; Latitude 42 degrees, 59 minutes, 36.00 seconds North; Longitude 122 degrees, 01 minutes, 17.48 seconds West.
RANGE IN CHARACTERISTICS: The average annual soil temperature ranges from 42 to 45 degrees F. The soils are usually moist but are dry in all parts of the moisture control section for 45 to 60 consecutive days following the summer solstice. The solum and thickness of andic soil properties is 14 to 30 inches. The solum has 70 to 100 percent volcanic ash, 0.4 to 1.0 acid oxalate extractable aluminum plus one-half iron, 25 to 50 percent phosphate retention, and 3 to 12 percent 15-bar on air-dry and moist samples. The solum has hue of 5YR, 7.5YR, or 10YR and averages less than 35 percent rock and pararock fragments. Depth to bedrock is greater than 60 inches.
A horizon:
Value-2 or 3 moist, 3 through 5 dry
Chroma-2 or 3 moist and dry
Cinder gravel content-0 to 15 percent
Pumice paragravel content-0 to 15 percent
Gravel (andesite) content-0 to 10 percent
Clay content-2 to 5 percent
Organic matter - 1 to 4 percent
Bw and BA horizon:
Value-3 or 4 moist, 4 or 5 dry
Chroma-3 or 4 moist and dry
Texture-ashy loamy sand or ashy sandy loam
Cinder gravel content-0 to 15 percent
Pumice paragravel content-0 to 20 percent
Gravel (andesite) content-0 to 10 percent
Clay content-0 to 5 percent
Organic matter - less than 1 percent below 10 inch depth
C horizon:
Value-3 or 4 moist, 4 or 5 dry
Chroma-2 through 4 moist and dry
Texture-ashy loamy sand or ashy sand
Cinder gravel content-0 to 20 percent
Pumice paragravel content-0 to 25 percent
Gravel (andesite) content-0 to10 percent
Cinder cobble content-0 to 5 percent
Cinder stone content-0 to 5 percent
Clay content-0 to 2 percent
Glass content - 70 to 100 percent
COMPETING SERIES: These are the Kittleson, Shroyton, Steiger, and Sycan series. Kittleson and Shroyton soils are 40 to 60 inches to bedrock. Steiger soils formed in air fall material comprised of ash and pumice and lack cinders or other hard rock fragments. Sycan soils are on terraces and have seasonal water tables with redox features below 40 inches.
GEOGRAPHIC SETTING: Collier soils are on ash flows at elevation of 4,000 to 6,000 feet. Slopes range from 0 to 30 percent. The soils formed in ash deposits derived from ash flow material from Mt. Mazama, The ash flow material is primarily ash, cinders, and pumice. The climate is characterized by cold wet winters and cool summers. The mean annual precipitation is 20 to 60 inches, falling mostly as snow. The mean annual air temperature is 38 to 45 degrees F and the frost-free period is 0 to 50 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Lapine, Maklak, Llaorock and Unionpeak series. Lapine and Maklak are ashy-pumiceous. Llaorock is medial-skeletal and is udic. Unionpeak is udic and has a weak duripan at 20 to 40 inches.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained. Permeability is rapid.
USE AND VEGETATION: These soils are used for wildlife, recreation, and timber production. Vegetation is white fir and ponderosa pine, with a understory of shrubs and forbs.
DISTRIBUTION AND EXTENT: Pumice mantled region of south central Oregon; MLRA 6. This series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Klamath County, Oregon, 1977
REMARKS: Diagnostic horizons and features in this pedon are:
Andic soil properties - from 1 to 23 inches
Vitri (greatgroup) - the solum averages 70 to 100 percent glass and has an air-dry 15-bar moisture content of 3 to 12 percent
Volcanic ash is from Mt. Mazama.
Particle-size control section - 0 to 40 inches
Soil temperature regime - Cryic
Moisture regime - Xeric
The soil assumed to have an ochric epipedon. The A horizon and upper part of the BA horizon to a depth of about 10 inches typically have over one percent organic matter. However, the dark colors are strongly parent material related below a depth of about 7 inches. Many areas of taxadjuncts exist in mapping that have a mollic epipedon (Humic Xeric subgroup).