LOCATION CHINTIMINI OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Andic Dystrudepts
TYPICAL PEDON: Chintimini very gravelly medial loam - woodland, on a 61 percent north-facing slope at 2,100 feet elevation. (Colors are for moist soil unless otherwise noted. When described on July 12, 2000 the soil was moist throughout.)
Oi--0 to 4 inches; undecomposed and slightly decomposed plant material; abrupt smooth boundary.
A--4 to 9 inches; dark brown (10YR 3/3) very gravelly medial loam, brown (10YR 5/3) dry; moderate very fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; moderately smeary; many very fine and fine, common medium, and few coarse roots; many very fine and fine irregular pores; 10 percent paragravel and 3 percent paracobbles; 50 percent gravel and 5 percent cobbles; very strongly acid (pH 4.9); NaF pH 10.9; clear smooth boundary. (4 to 6 inches thick)
AB--9 to 20 inches; brown (10YR 4/3) extremely gravelly medial loam, pale brown (10YR 6/3) dry; moderate very fine and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; moderately smeary; many very fine and fine, and common medium and coarse roots; many very fine and fine tubular pores; 15 percent paragravel and 5 percent paracobbles; 45 percent gravel and 15 percent cobbles; very strongly acid (pH 4.9); NaF pH 10.9; clear wavy boundary. (10 to 12 inches thick)
Bw--20 to 38 inches; yellowish brown (10YR 5/4) extremely cobbly clay loam, very pale brown (10YR 7/4) dry; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; moderately smeary; common very fine and fine, and few medium and coarse roots; many very fine and fine, and few medium tubular pores; 30 percent paragravel and 5 percent paracobbles; 30 percent gravel and 35 percent cobbles; strongly acid (pH 5.1); NaF pH 10.8; clear wavy boundary. (17 to 30 inches thick)
C--38 to 47 inches; yellowish brown (10YR 5/6) very paragravelly clay loam, yellow (10YR 8/6) dry; massive; hard, firm, moderately sticky and moderately plastic; moderately smeary; few fine, medium, and coarse roots between peds; common fine tubular pores; 20 percent paragravel; 5 percent cobbles; very strongly acid (pH 5.0); NaF pH 10.6; clear wavy boundary. (9 to 12 inches thick)
Cr--47 to 51 inches; weakly cemented, partially fractured sandstone; fractured at intervals of 18 to less than 39 inches; few fine, medium, and coarse roots between fracture planes; abrupt wavy boundary. (3 to 9 inches thick)
R--51 inches; very strongly cemented sandstone, fractured at intervals of 4 to less than 18 inches; few fine, medium, and coarse roots between fracture planes.
TYPE LOCATION: Benton County, Oregon; located about 2,550 feet south and 2,500 feet east of the northwest corner of section 23, T. 13S., R. 8W. (Latitude 44 degrees, 25 minutes, 37 seconds N.; Longitude 123 degrees, 37 minutes, 41 seconds W.; Grass Mountain, OR 7.5 minute USGS Quad; NAD 1927)
RANGE IN CHARACTERISTICS:
Soil moisture: Udic moisture regime
Mean annual soil temperature: 43 to 47 degrees F., and the mean summer soil temperature is above 47 degrees F. with an O horizon present.
Solum thickness: 30 to 48 inches
Depth to bedrock: 40 to 60 inches to paralithic contact; lithic contact within 80 inches
Bedrock hardness classes: paralithic contact ranges from very weakly cemented to moderately cemented; lithic contact ranges from strongly cemented to indurated
Particle-size control section:
Clay content - 15 to 30 percent (field estimate)
Coarse fragments - 35 to 65 percent rock fragments; greater than 35 percent pararock fragments
Hue: 10YR or 7.5YR
Soil reaction: very strongly acid or strongly acid
Other features: The solum has weakly smeary or moderately smeary consistence (field estimate)
A horizon
Value: 2 to 4 moist, 3 to 5 dry
Chroma: 2 or 3 moist, 2 to 4 dry
Texture: GRV-medial L
Clay content: 12 to 20 percent (field estimate)
Rock fragments: 35 to 50 percent gravel, 5 to 20 percent cobbles, 0 to 5 percent stones
Pararock fragments: 10 to 25 percent paragravel and 0 to 5 percent paracobbles
Organic matter content: 5 to 10 percent
Andic soil features: moist bulk density of 0.80 to 1.0 grams per cubic centimeter, phosphate retention of 85 percent or greater, acid-oxalate extractable aluminum plus one-half iron of 1.0 to 2.0 percent, and 15-bar moisture (air-dried) of 15 to 30 percent
AB horizon
Value: 3 to 5 moist, 4 to 6 dry
Chroma: 3 or 4 moist and dry
Texture: GRX-medial L, GRV-medial L, or CBV-medial L
Clay content: 15 to 25 percent
Rock fragments: 35 to 50 percent gravel, 5 to 20 percent cobbles, 0 to 5 percent stones
Pararock fragments: 10 to 25 percent paragravel and 0 to 5 percent paracobbles
Andic soil features: moist bulk density of 0.90 to 1.0 grams per cubic centimeter, phosphate retention of 85 percent or greater, acid-oxalate extractable aluminum plus one-half iron of 1.0 to 2.0 percent, and 15-bar moisture (air-dried) of 15 to 30 percent
Bw horizon
Value: 4 to 6 moist, 5 to 7 dry
Chroma: 4 to 6 moist and dry
Texture: CBX-L, CBX-CL, or GRX-L
Clay content: 15 to 30 percent
Rock fragments: 20 to 40 percent cobbles, 30 to 50 percent gravel, 0 to 5 percent stones
Pararock fragments: 20 to 30 percent paragravel and 5 to 10 percent paracobbles
C horizon
Value: 5 or 6 moist, 6 to 8 dry
Chroma: 4 to 6 moist and dry
Texture: PGRV-CL, PGRV-L, or PGRX-CL
Clay content: 15 to 30 percent
Rock fragments: 0 to 10 percent gravel and 0 to 5 percent cobbles
Pararock fragments: 35 to 60 percent paragravel and 0 to 20 percent paracobbles
Reaction: Strongly acid or moderately acid
COMPETING SERIES: These are the
Dougan,
Fernwood,
Hoffstadt,
Marblecreek,
Sarazan, and
Zygore series.
Dougan (WA) - 30 to 40 inches deep to a lithic contact; ash influence with ashy textural modifiers in the A horizon; umbric epipedon 10 to 12 inches thick.
Fernwood (WA) - 20 to 40 inches deep to a lithic contact; umbric epipedon 10 to 18 inches thick.
Hoffstadt (WA) 40 to 60 inches deep to a lithic contact
Marblecreek (ID) - Greater than 60 inches to bedrock contact; 30 to 65 percent volcanic glass in upper part of the solum (A horizon)
Sarazan (WA) - 40 to 60 inches deep to a lithic contact with no paralithic contact; volcanic glass influence with ashy modifiers.
Zygore (OR) - Greater than 60 inches to bedrock contact; umbric epipedon 10 to 20 inches thick.
GEOGRAPHIC SETTING:
Parent material: Loamy colluvium derived from sandstone and siltstone of the Tyee and Flournoy Formations
Landform: Mountains
Landform position: Summits, backslopes, footslopes, and toeslopes
Slopes: 20 to 90 percent
Elevation: 1,800 to 3,000 feet
Climate: cool, wet winters; warm, moist summers
Mean annual temperature: 42 to 46 degrees F
Mean annual precipitation: 90 to 130 inches
Frost free period: 70 to 120 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Blodgett,
Burntwoods,
Fiverivers,
Grassmountain,
Luckiamute,
Lurnick,
Maryspeak, and
Oldblue soils. Blodgett, Burntwoods, Fiverivers, Grassmountain, and Oldblue soils occur on summits and side slopes of mountains. Luckiamute, Lurnick and Maryspeak soils occur in a cryic temperature regime on adjacent higher mountain slopes.
Blodgett- loamy-skeletal; less than 20 inches deep to Cr over R contact
Burntwoods - medial-skeletal over loamy-skeletal; greater than 60 inches deep to bedrock
Fiverivers - fine-loamy; 20 to 40 inches deep to a paralithic contact
Grassmountain - fine-loamy; greater than 60 inches deep to a paralithic contact
Luckiamute - loamy-skeletal; less than 20 inches deep to a lithic contact
Lurnick - clayey-skeletal; 20 to 40 inches deep to a paralithic contact
Maryspeak - sandy-skeletal; greater than 80 inches deep
Oldblue - fine-loamy; 40 to 80 percent pararock fragments
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.
USE AND VEGETATION: These soils are used for timber production, recreation, wildlife habitat and watersheds. Potential native vegetation is western hemlock, Douglas fir, cascade Oregongrape, Pacific rhododendron, red huckleberry, salal, evergreen violet, western swordfern, deerfoot vanillaleaf, Pacific trillium and Oregon oxalis. Scattered amounts of noble fir, Pacific silver fir, and tall blue huckleberry occur in some areas at the higher elevations within the frigid zone.
DISTRIBUTION AND EXTENT: Central portion of the Coast Range Mountains of Oregon; MLRA 1. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Benton County, Oregon, 2004. The name is taken from the translation of the Kalapuya Indian word for Marys Peak in western Benton County, the highest point in the Oregon Coast Range.
REMARKS: Diagnostic horizons and features recognized in this pedon include:
Ochric epipedon
Cambic horizon - from a depth of 20 to 38 inches (Bw horizon)
Andic subgroup feature - from the mineral soil surface to a depth of 20 inches (A and AB horizon). Based on lab data.
Particle-size control section (Loamy-skeletal family) - from a depth of 14 to 44 inches (6 inches of the AB horizon, all of the Bw horizon, and 6 inches of the C horizon).
Medial modifiers were used for those horizons meeting the andic subgroup criteria although not meeting andic soil properties. A proposal was submitted to NSSC (2000) to revise the definition of medial to also include those soil properties qualifying for the Andic subgroup under criteria #1 for andic soil properties.
The Cr over R bedrock contact is recognized as a diagnostic feature for this series.
Depths to diagnostic horizons and features are measured from the top of the first mineral layer.
Classification revised 08/2002 from loamy-skeletal, isotic, frigid Typic Dystrudepts to loamy-skeletal, isotic, frigid Andic Dystrudepts based on lab data from the modal pedon and associated soils.
ADDITIONAL DATA: Characterization data available for pedons S01OR-003-012 and S01OR-003-013, NSSL, Lincoln, NE, 5/02.