LOCATION COOLCAMP OR
Tentative Series
DRJ/JGM/KMS
01/2017
COOLCAMP SERIES
Landscape--western Cascade Mountains
Landform--glacially influenced structural benches, earthflows with some on complex landslides, complex landslides
Slope--0 to 75 percent
Parent material--colluvium and/or slide deposits derived from igneous rock mixed with till and volcanic ash throughout
Mean annual precipitation--about 2100 mm
Mean annual air temperature--about 7 degrees C
Depth--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Medial-skeletal, amorphic, frigid Typic Hapludands
TYPICAL PEDON: Coolcamp gravelly medial silt loam on a 26-percent, northwest-facing, forested slope at an elevation of 940 m (The soil was moderately dry throughout when described on August 16, 2013.)
Oe--0 to 6 cm; moderately decomposed plant material; abrupt wavy boundary
A--6 to 36 cm; gravelly medial silt loam, brown (7.5YR 5/2) dry, dark brown (7.5YR 3/2) moist; moderate fine granular structure; very friable, loose, slightly sticky and slightly plastic; many very fine, common fine, medium, and very coarse, and few coarse roots; many very fine and fine irregular pores and common medium and coarse tubular pores; 20 percent basalt gravel; strongly acid (pH 5.3); abrupt wavy boundary
BA--36 to 58 cm; gravelly medial silt loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; moderate very fine and fine subangular blocky structure; friable, soft, slightly sticky and moderately plastic; common very fine, medium, and very coarse and few fine and coarse roots; many very fine dendritic tubular and irregular pores and common fine, medium, and coarse tubular pores; 20 percent basalt gravel and 5 percent basalt cobbles; strongly acid (pH 5.5); clear wavy boundary
Bw1--58 to 96 cm; very gravelly medial silt loam, light brown (7.5YR 6/4) dry, brown (7.5YR 4/4) moist; moderate very fine and fine subangular blocky structure; friable, slightly hard, slightly sticky and slightly plastic; few very fine, fine, medium, coarse, and very coarse roots; common very fine and fine dendritic tubular pores and common very fine and fine and few medium tubular pores; 40 percent basalt gravel and 15 percent basalt cobbles; moderately acid (pH 5.7); clear wavy boundary
Bw2--96 to 150 cm; extremely gravelly medial silt loam, light brown (7.5YR 6/4) dry, brown (7.5YR 4/4) moist; weak very fine and fine subangular blocky structure; friable, slightly hard, slightly sticky and nonplastic; common very fine and few fine, medium, coarse, and very coarse roots; common very fine and fine dendritic tubular pores and common very fine and fine and few medium tubular pores; 50 percent basalt gravel and 15 percent basalt cobbles; moderately acid (pH 5.9)
TYPE LOCATION: Linn County, Oregon, about 36 km east of Sweet Home and about 11.5 km northeast of the junction of Upper Soda Fork Road and OR Highway 20; about 350 m north and 760 m west of the southeast corner of section 27, T. 12 S., R. 5 E., Willamette Meridian; latitude 44.4925278, longitude -122.1973611, datum WGS 84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--5 to 7 degrees C
Dry days--less than 45 consecutive days between depths of 10 and 30 cm following summer solstice
Thickness of umbric epipedon--25 to 50 cm
Reaction--5.0 to 6.0 throughout all mineral horizons
Thickness of andic soil properties--greater than 150 cm (below mineral soil surface)
Estimated properties of layers with andic soil properties
*1/3-bar bulk density--0.6 to 0.9 g/cm3
*Phosphate retention--greater than 85 percent
*Ammonium oxalate extractable Al + 1/2 Fe--2 to 4 percent
*15-bar water retention--30 to 70 percent (undried samples), greater than 15 percent (dried samples)
*0.02- to 2.0-mm fraction--greater than 30 percent
*Volcanic glass content in 0.02- to 2.0-mm fraction--5 to 30 percent
Particle-size control section
*Clay content--18 to 27 percent
*Total fragment content--35 to 60 percent
O horizon
*Thickness--1 to 10 cm
A horizon
*Hue--10YR, 7.5YR
*Value--2 to 3 moist, 3 to 5 dry
*Chroma--2 or 3 moist or dry
*Fine-earth texture--medial silt loam
*Clay content--15 to 20 percent
*Sand content--20 to 35 percent
*Total fragment content--15 to 35 percent
*Gravel content--15 to 30 percent
*Cobble content--0 to 10 percent
*Thickness--25 to 50 cm
BA horizon, or AB horizon (where present)
*Hue--10YR, 7.5YR
*Value--2.5 to 4 moist, 4 to 6 dry
*Chroma--2 to 4 moist, 3 or 4 dry
*Fine-earth texture--medial silt loam, medial loam
*Clay content--18 to 27 percent
*Sand content--20 to 40 percent
*Total fragment content--25 to 60 percent
*Gravel content--25 to 40 percent
*Cobble content--0 to 25 percent
*Stone content--0 to 5 percent
*Thickness--0 to 35 cm
Bw1 horizon
*Hue--10YR, 7.5YR
*Value--3 to 5 moist, 5 to 7 dry
*Chroma--3 or 4 moist, 3 to 6 dry
*Fine-earth texture--medial silt loam, medial loam
*Clay content--18 to 27 percent
*Sand content--15 to 35 percent
*Total fragment content--35 to 60 percent
*Gravel content--25 to 45 percent
*Cobble content--5 to 30 percent
*Stone content--0 to 10 percent
Bw2 horizon
*Hue--2.5Y, 10YR, 7.5YR
*Value--3 to 5 moist, 5 to 7 dry
*Chroma--3 or 4 moist, 3 to 6 dry
*Fine-earth texture--medial silt loam, medial loam
*Clay content--18 to 27 percent
*Sand content--15 to 35 percent
*Total fragment content--40 to 70 percent
*Gravel content--25 to 60 percent
*Cobble content--10 to 35 percent
*Stone content--0 to 15 percent
Combined thickness of Bw horizon--65 to 150 cm
COMPETING SERIES:
Kyotesue--ochric epipedon
Huss--50 to 100 cm deep to hard bedrock
GEOGRAPHIC SETTING:
Elevation--700 to 1200 m
Climate--warm, dry summers; cool, wet winters
Mean annual precipitation--1900 to 2300 mm
Mean annual air temperature--6 to 8 degrees C
Frost-free period--90 to 135 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Menagerie--not skeletal; in linear or slightly concave positions
Huss--50 to 100 cm deep to hard bedrock; in convex positions
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation in normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--moderately high
USE AND VEGETATION:
Use--watershed, recreation, wildlife habitat, timber production
Potential natural vegetation--Douglas-fir, western hemlock, Pacific rhododendron, Cascade Oregon grape, salal, white-veined pyrola, red huckleberry, beargrass, snow raspberry, twinflower
DISTRIBUTION AND EXTENT: Central western Cascade Mountains, Oregon; MLRA 3; small extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Willamette National Forest, Linn County, Oregon; name from old logging camp
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 6 to 106 cm
*Umbric epipedon--zone from 6 to 36 cm
*Cambic horizon--zone from 36 to 150 cm
*Andic soil properties--zone from 6 to 150 cm
*Volcanic glass--zone from 6 to 150 cm
06/2016--Assumed to meet criteria 2 (no ash required) for andic soil properties, in the 12th edition of Keys to Soil Taxonomy. It is also assumed that enough ash is present for the soils to meet criteria 3. Additional lab data is needed to confirm the degree of ash influence.
ADDITIONAL DATA: Type location user site ID--2013OR043004
National Cooperative Soil Survey
U.S.A.