LOCATION KINZEL OR
Established Series
Rev. AON/JGM/KMS
01/2017
KINZEL SERIES
Landscape--western Cascade Mountains
Landform--mountain slopes, broad ridgetops on mountains, side slopes of canyons in mountains, colluvial aprons in U-shaped valleys
Slope--5 to 90 percent
Parent material--colluvium derived from hard extrusive igneous rock mixed with glacial till and volcanic ash throughout
Mean annual precipitation--2800 mm
Mean annual air temperature--about 6 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Medial-skeletal, amorphic Typic Fulvicryands
TYPICAL PEDON: Kinzel gravelly medial silt loam, forested
Oi--0 to 4 cm; slightly decomposed plant material consisting of needles, twigs, cones, and leaves
A1--4 to 8 cm; gravelly medial silt loam, gray (10YR 5/1) dry, black (10YR 2/1) moist; many clean light gray silica sand grains; weak very fine granular structure; soft, very friable, slightly sticky and slightly plastic; many roots; many very fine and fine irregular and tubular pores; 15 percent rock fragments; very strongly acid (pH 4.6); abrupt wavy boundary
A2--8 to 37 cm; gravelly medial silt loam, brown (7.5YR 4/3) dry, very dark brown (7.5YR 2/2) moist; moderate very fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine tubular and irregular pores; many roots; 20 percent gravel and 5 percent cobbles; strongly acid (pH 5.5); gradual smooth boundary
Bw1--37 to 60 cm; extremely cobbly medial silt loam, brown (10YR 5/3) dry, brown (7.5YR 4/3) moist; weak medium subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine tubular pores; common roots; 20 percent gravel, 30 percent cobbles, and 15 percent stones; moderately acid (pH 5.6); clear wavy boundary
Bw2--60 to 75 cm; extremely cobbly medial silt loam, brown (10YR 5/3) dry, dark brown (10YR 3/3) moist; moderate very fine, fine, and medium subangular blocky structure; soft, friable, slightly sticky and slightly plastic; many very fine and fine tubular pores; common roots; 20 percent gravel, 30 percent cobbles, and 20 percent stones; moderately acid (pH 5.8); clear wavy boundary
BC--75 to 100 cm; extremely cobbly medial silt loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; weak very fine, fine, and medium subangular blocky structure; soft, very friable, nonsticky and slightly plastic; many very fine and fine tubular pores; common roots; 30 percent gravel, 35 percent cobbles, and 5 percent stones; moderately acid (pH 5.6); clear wavy boundary
C--100 to 155 cm; extremely cobbly medial sandy loam, light yellowish brown (10YR 6/4) dry, dark yellowish brown (10YR 4/4) moist; massive; soft, very friable, nonsticky and slightly plastic; 30 percent gravel, 35 percent cobbles, and 5 percent stones; many very fine and fine tubular pores; common roots; moderately acid (pH 5.7)
TYPE LOCATION: Clackamas County, Oregon, 90 m east of the north corner of Bull Run Lake; in the SE1/4SW1/4 of section 21, T. 1 S., R. 8 E.; latitude 45.4635355, longitude -121.8363497, datum WGS 84 (coordinates estimated from PLSS details)
RANGE IN CHARACTERISTICS:
Dry days--less than 45 consecutive days following summer solstice
Mean annual soil temperature--5 to 8 degrees C
Thickness of umbric epipedon--25 to 45 cm (below mineral soil surface)
Reaction--4.5 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--0.60 to 0.90 g/cm3
*Phosphate retention--greater than 85 percent
*Ammonium oxalate extractable Al + Fe--2.0 to 4.0 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--10 to 20 percent
*Total fragment content--15 to 80 percent, weighted average more than 35 percent
A1 horizon
*Hue--10YR
*Value--2 or 3 moist, 3 to 5 dry
*Chroma--1 or 2 moist or dry
*Fine-earth texture--medial loam, medial silt loam
*Clay content--10 to 20 percent
*Total fragment content--15 to 50 percent
*Gravel content--10 to 45 percent
*Cobble content--3 to 15 percent
*Organic matter content--8 to 15 percent
A2 horizon
*Hue--10YR, 7.5YR, variegations of 5YR in some areas
*Value--2 or 3 moist, 4 or 5 dry
*Chroma--2 or 3 moist or dry
*Fine-earth texture--medial loam, medial silt loam
*Clay content--10 to 20 percent
*Total fragment content--15 to 50 percent
*Gravel content--10 to 45 percent
*Cobble content--0 to 15 percent
*Organic matter content--8 to 15 percent
Bw horizon
*Hue--7.5YR, 10YR
*Value--4 moist, 5 or 6 dry
*Chroma--3 or 4 moist or dry
*Fine-earth texture--medial loam, medial silt loam, medial sandy loam
*Clay content--10 to 20 percent
*Total fragment content--35 to 80 percent
*Gravel content--15 to 40 percent
*Cobble content--10 to 40 percent
*Stone content--0 to 20 percent
C horizon
*Hue--7.5YR, 10YR
*Value--4 moist, 5 or 6 dry
*Chroma--3 or 4 moist or dry
*Fine-earth texture--medial loam, medial silt loam, medial sandy loam
*Clay content--10 to 20 percent
*Total fragment content--35 to 80 percent
*Gravel content--15 to 60 percent
*Cobble content--20 to 50 percent
*Stone content--5 to 20 percent
COMPETING SERIES:
Stahl--50 to 100 cm deep to lithic contact
Talapus--50 to 100 cm deep to firm till (not root-restricting)
GEOGRAPHIC SETTING:
Elevation--850 to 1600 m
Climate--cold, wet winters; cool, moist summers
Mean annual precipitation--1800 to 3700 mm
Mean annual air temperature--4 to 7 degrees C
Frost-free period--10 to 105 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Lastance--E horizon; spodic horizon; on ridges and side slopes of valley walls
Talapus--50 to 100 cm deep to firm till; in similar positions
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high
USE AND VEGETATION:
Use--timber production, wildlife habitat, recreation
Potential natural vegetation--Pacific silver fir, Douglas-fir, western hemlock, Alaska huckleberry, bunchberry dogwood, vanillaleaf, insideout flower
DISTRIBUTION AND EXTENT: Cascade Mountains of northwestern Oregon; MLRA 3; moderate extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clackamas County, Oregon (Bull Run, Sandy Area); 1976
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Umbric epipedon--zone from 4 to 37 cm
*Cambic horizon--zone from 37 to 100 cm
*Andic soil properties--zone from 4 to 155 cm
*Particle-size control section--zone from 4 to 104 cm
08/2016--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. Based on data populated in NASIS for Clackamas, Marion, and Multnomah Counties, the series was reclassified as a Fulvicryand. Additional lab data is needed to confirm the degree of ash influence and to determine if the range in glass content is appropriate. Horizonation in the typical pedon suggests that the series may classify as a Spodosol; this should be further investigated.
The soils are derived dominantly from rock of the Cascade Andesite Formation (olivine basalt and olivine-bearing andesite); however, they are derived from rock of the Columbia River Basalt Formation in some areas.
11/2000--Andic soil properties to a depth of 150 cm are based on guidelines developed from laboratory data for soils recognized in the western Oregon Cascades.
Competing series classified as Andic Cryumbrepts include the Alfir, Naxing, Saydab, and Stahl series.
National Cooperative Soil Survey
U.S.A.