LOCATION COLLIER OR
Established Series
Rev. AGG/KLM/CEG
07/2026
COLLIER SERIES
Landscape--East Cascade mountains, pumice-mantled plateaus, Newberry volcanic fields
Landform--Ash flows, pyroclastic flows, buttes, cinder cones, mountain slopes, tephra volcanic fields
Slope--0 to 80 percent
Parent Material--Volcanic ash, pumiceous tephra, cinders, and/or other volcanic rock, or alluvium, colluvium, or eolian deposits derived from those materials
Mean annual precipitation--1020 millimeters
Mean annual air temperature--5 degrees C
Depth class--Very deep
Drainage class--Somewhat excessively drained
Soil moisture regime--Xeric
Soil temperature regime--Cryic
TAXONOMIC CLASS: Ashy, glassy Xeric Vitricryands
TYPICAL PEDON: Collier ashy sandy loam, forested, on a 3 percent slope at an elevation of 1760 meters. (Colors are for dry soil unless otherwise noted.)
Oi--0 to 3 centimeters; slightly decomposed plant material
A--3 to 13 centimeters; ashy sandy loam; dark yellowish brown (10YR 4/4), very dark brown (10YR 2/2), moist; 4 percent field estimated clay; weak fine granular structure; very friable, nonsticky, nonplastic; many very fine and fine roots and common medium roots throughout; many fine low-continuity interstitial pores; 3 percent subangular andesite gravel, 5 percent subrounded pumice paragravel; slightly acid (pH 6.1); clear wavy boundary
BA--13 to 30 centimeters; ashy loamy sand; brown (7.5YR 5/2), dark brown (7.5YR 3/2), moist; 3 percent field estimated clay; weak fine subangular blocky structure; very friable, nonsticky, nonplastic; many very fine and fine roots throughout; many fine low-continuity interstitial pores; 3 percent subangular andesite gravel, 5 percent subrounded pumice paragravel; slightly acid (pH 6.1); clear wavy boundary
Bw--30 to 58 centimeters; ashy paragravelly loamy sand; light brown (7.5YR 6/3), brown (7.5YR 4/2), moist; 3 percent field estimated clay; weak fine subangular blocky structure; very friable, nonsticky, nonplastic; few very fine roots throughout; many fine low-continuity interstitial pores; 8 percent subrounded andesite gravel, 15 percent subrounded pumice paragravel; slightly acid (pH 6.1); clear wavy boundary
C--58 to 157 centimeters; paragravelly ashy sand; light brown (7.5YR 6/4), brown (7.5YR 4/4), moist; single grain; loose; nonsticky, nonplastic; few fine roots throughout; many fine low-continuity interstitial pores; 8 percent subrounded andesite gravel, 15 percent subrounded pumice paragravel; neutral (pH 6.6)
TYPE LOCATION: Klamath County, Oregon; NW 1/4, NW 1/4 of section 9, T. 30 S., R. 6 E., Willamette Meridian
USGS Quadrangle: Crater Lake East, OR
Latitude: 42.9933319
Longitude: -122.0215225
Datum WGS84
Coordinates source: Hand-held GPS
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--4.3 to 8.2 degrees C
Soil Moisture--Usually moist in winter and spring, dry in the moisture control section for 45 to 60 consecutive days in the 4 months following the summer solstice
Reaction--5.6 to 7.3 (moderately acid to neutral)
Thickness of ash influenced layers--Over 100 centimeters from the mineral soil surface
Estimated properties of layers influenced by volcanic ash
Ammonium oxalate extractable Al + Fe--0.4 to 1 percent
1500 kPa water content (air dry and moist)--3 to 12 percent
0.02 to 2.0 mm fraction--55 to 98 percent
Volcanic glass in the 0.02 to 2.0 millimeter fraction--70 to 100 percent
P retention--25 to 50 percent
Particle-size control section: Mineral soil surface to 100 centimeters
Clay content (weighted average): 0 to 5 percent
Rock fragment content (weighted average): less than 35 percent rock and pararock fragments
O horizon (where present):
Thickness--0 to 5 centimeters
A horizon:
Hue--10YR,7.5YR, 5YR
Value--2 or 3 moist, 3 to 5 dry
Chroma--2 or 3 moist and dry
Fine earth texture--ashy sandy loam, ashy loamy sand, ashy loamy coarse sand
Clay--2 to 5 percent
Sand--55 to 90 percent
Organic matter--2 to 5 percent
Total fragment content--0 to 15 percent
Andesite gravel content--0 to 10 percent
Cinder gravel content--0 to 15 percent
Pumice paragravel content--0 to 15 percent
Reaction--pH 5.6 to 7.3 (moderately acid to neutral)
Thickness--5 to less than 18 centimeters
Bw and BA horizon:
Hue--10YR,7.5YR, 5YR
Value--3 or 4 moist, 4 or 5 dry
Chroma--3 or 4 moist or dry
Fine earth texture--ashy sandy loam, ashy loamy sand, ashy loamy coarse sand
Clay--0 to 5 percent
Sand--55 to 85 percent
Organic matter--0.5 to 2 percent
Total fragment content--0 to less than 35 percent
Andesite gravel content--0 to 10 percent
Cinder gravel content--0 to 15 percent
Pumice paragravel content--0 to 20 percent
Reaction--pH 5.6 to 6.5 (moderately acid to slightly acid)
Thickness--20 to 60 centimeters
C horizon:
Hue--10YR,7.5YR, 5YR
Value--3 or 4 moist, 4 or 5 dry
Chroma--1 to 8
Fine earth texture-ashy loamy sand, ashy loamy coarse sand, ashy sand
Clay--0 to 2 percent
Sand--70 to 98 percent
Organic matter--0 to 0.5 percent
Total rock fragment content--0 to less than 35 percent
Andesite gravel content--0 to 10 percent
Andesite cobble content--0 to 5 percent
Pumice paragravel--0 to 34 percent
Cinder cobble content--0 to 5 percent
Cinder stone content--0 to 5 percent
Pumice paracobble content--0 to 5 percent
Reaction--pH 6.1 to 7.3 (slightly acid to neutral)
Thickness--40 to over 100 centimeters
COMPETING SERIES:
Goffpeak--100 to 150 centimeters to lithic contact
Kittleson--100 to 150 centimeters to paralithic contact
Norwicki--50 to 100 centimeters to lithic contact
Steiger--Lacks lithic rock fragments in the particle-size control section; formed from ash fall deposits
Wocreek--Less than 80 percent sand in the upper portion of the particle-size control section; has a lithologic discontinuity
GEOGRAPHIC SETTING:
Elevation--1225 to 1825 meters
Climate--cold, wet winters and cool, dry summers
Mean annual precipitation--500 to 1500 millimeters
Mean annual air temperature--3.3 to 7.2 degrees C
Frost-free period--0 to 50 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Lapine--Formed on pumice-mantled lava plans, hills and cinder cones; contains greater than 35 percent paragravel fragments in the particle-size control section (i.e., ashy-pumiceous)
Maklak--Formed on pumice flows; contains greater than 35 percent pararock fragments in the particle-size control section
Steiger--Formed on pumice-mantled terraces, lava plains, plateaus and hills
Wikiup--Formed in depressions and swales on pumice-mantled stream terraces; aquic moisture regime
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage--somewhat excessively
Saturated hydraulic conductivity (Ksat)--high to very high throughout
Ponding: None
Flooding: None
USE AND VEGETATION:
Use--Timber production, wildlife habitat, recreation
Vegetation--white fir, ponderosa pine, lodgepole pine, greenleaf manzanita, antelope bitterbrush, pinemat manzanita, wax currant, snowbrush ceanothus, pipsissewa, western needlegrass
DISTRIBUTION AND EXTENT:
East slope of the Cascade Mountains, Oregon; MLRA 6; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: 1977
REMARKS:
Typical Pedon Taxonomic Features:
Particle-size control section--Mineral soil surface to 102 centimeters
Ochric epipedon
Andic soil properties--3 to 58 centimeters
Taxonomic version: Keys to Soil Taxonomy, 13th edition (2022)
The volcanic ash deposit is from Mt. Mazama.
ADDITIONAL DATA:
Complete Kellogg Soil Survey Laboratory (KSSL) characterization--02N0665
National Cooperative Soil Survey
U.S.A.