PEDON DESCRIPTION

Print Date: 11/24/2009Country:
Description Date: 10/29/2002State: Oregon
Describer: Dorr, JimCounty: Klamath
Site ID: 02-JFD-07MLRA: 3 -- Olympic and Cascade Mountains
Site Note: Soil Survey Area: OR683 -- Winema National Forest Area, Oregon
Pedon ID: 02OR035008Map Unit: 1256 -- Oatman gravelly medial sandy loam, 4 to 20 percent slopes
Pedon Note: Quad Name: Mount Mcloughlin, Oregon
Lab Source ID: SSLLocation Description: Billie Creek Snotel Site, about 26 miles west and 12 miles north of Klamath Falls, about 50 feet northwest of FS Road #3650, about 60 feet northwest of Cascade Canal
Lab Pedon #: 03N0251Legal Description: about 1900 feet north and 200 feet east of southwest corner of Section 29, Township 36 S., Range 5 E.
Soil Name as Described/Sampled: OatmanLatitude: 42 degrees 24 minutes 27.00 seconds north
Soil Name as Correlated: Longitude: 122 degrees 16 minutes 4.00 seconds west
Classification: Medial-skeletal, amorphic Xeric HaplocryandsDatum: NAD27
Pedon Type: within range of seriesUTM Zone: 10
Pedon Purpose: full pedon descriptionUTM Easting: 560439 meters
Taxon Kind: seriesUTM Northing: 4695042 meters
Associated Soils:
Physiographic Division: Primary Earth Cover: Tree cover
Physiographic Province: Secondary Earth Cover:
Physiographic Section: Existing Vegetation:
State Physiographic Area: Parent Material: residuum weathered from volcanic rock and/or tephra
Local Physiographic Area: Bedrock Kind:
Geomorphic Setting: on backslope of mountainflank of None AssignedBedrock Depth:
Upslope Shape: Bedrock Hardness:
Cross Slope Shape: Bedrock Fracture Interval:
Particle Size Control Section: 2 to 102 cm.Surface Fragments:
Description origin: NASISDescription database: NSSL
Diagnostic Features: andic soil properties 2 to 105 cm.
umbric epipedon 2 to 70 cm.
duripan 105 cm.

Top Depth (cm)Bottom Depth (cm)Restriction Kind Restriction Hardness
105
duripanmoderately cemented



Cont. Site ID: 02-JFD-07Pedon ID: 02OR035008

Slope (%)Elevation (meters)Aspect (deg)MAAT (C)MSAT (C)MWAT (C)MAP (mm)Frost-Free DaysDrainage ClassSlope Length (meters)Upslope Length (meters)
5.01,597.02005.6

1,37030moderately well


Oi--0 to 2 centimeters; slightly decomposed plant material; low excavation difficulty; Slightly decomposed forest litter of needles. leaves, twigs, cones. Discontinous in tree interspaces, ranges from 0 to 3 cm thick; abrupt broken boundary.

A--2 to 32 centimeters; very dark brown (7.5YR 2.5/2) broken face stony medial loam, dark grayish brown (10YR 4/2) broken face, dry; 60 percent sand; 3 percent clay; weak coarse granular parting to moderate very fine granular structure; very friable, soft, nonsticky, nonplastic; moderate excavation difficulty; few fine roots throughout and many medium roots throughout and few coarse roots throughout and very few very coarse roots throughout and many very fine roots throughout; many very fine low-continuity interstitial pores; 2 percent nonflat subangular indurated 76- to 250- millimeter andesite fragments and 2 percent nonflat subangular indurated 251- to 600-millimeter andesite fragments and 3 percent nonflat subrounded moderately cemented 2- to 75-millimeter durinodes and 3 percent nonflat subangular strongly cemented 76- to 250-millimeter durinodes and 3 percent nonflat subrounded weakly cemented 2- to 10-millimeter durinodes and 3 percent nonflat subangular strongly cemented 251- to 600-millimeter durinodes and 4 percent nonflat subangular indurated 2- to 75-millimeter andesite fragments; 0.6 grams/cc field bulk density; slightly acid, pH 6.2, Bromthymol blue; moderately hydrophobic, field estimated organic matter content 6 to 8 percent; clear smooth boundary. Lab sample # 03N01260, 03N01261, 03N01262

AB--32 to 70 centimeters; very dark brown (7.5YR 2.5/3) broken face very stony medial loam, brown (10YR 4/3) broken face, dry; 55 percent sand; 2 percent clay; weak medium subangular blocky parting to weak medium granular, and weak medium subangular blocky parting to weak fine granular structure; very friable, soft, nonsticky, nonplastic; moderate excavation difficulty; few fine roots throughout and few medium roots throughout and very few coarse roots throughout and very few very coarse roots throughout and many very fine roots throughout; many very fine low-continuity interstitial pores; 5 percent nonflat subrounded moderately cemented 2- to 75-millimeter durinodes and 5 percent nonflat subangular indurated 2- to 75-millimeter andesite fragments and 5 percent nonflat subangular strongly cemented 76- to 250-millimeter durinodes and 5 percent nonflat subangular indurated 76- to 250-millimeter andesite fragments and 10 percent nonflat subangular strongly cemented 251- to 600- millimeter durinodes and 10 percent nonflat subangular indurated 251- to 600-millimeter andesite fragments and 10 percent nonflat subrounded weakly cemented 2- to 10-millimeter durinodes; 0.7 grams/cc field bulk density; slightly acid, pH 6.4, Bromthymol blue; clear wavy boundary. Lab sample # 03N01263

Bw--70 to 105 centimeters; dark yellowish brown (10YR 3/4) broken face extremely gravelly medial fine sandy loam, dark yellowish brown (10YR 4/4) broken face, dry; 55 percent sand; 2 percent clay; weak medium subangular blocky structure; very friable, soft, nonsticky, nonplastic; high excavation difficulty; very few fine roots throughout and very few medium roots throughout and many very fine roots throughout; many very fine low-continuity interstitial pores; 5 percent nonflat subrounded weakly cemented 2- to 10-millimeter durinodes and 10 percent nonflat subangular strongly cemented 76- to 250-millimeter durinodes and 10 percent nonflat subangular indurated 76- to 250-millimeter andesite fragments and 22 percent nonflat subrounded moderately cemented 2- to 75-millimeter durinodes and 23 percent nonflat subangular indurated 2- to 75-millimeter andesite fragments; 1.1 grams/cc field bulk density; slightly acid, pH 6.4, Bromthymol blue; horizon ranges from 10 to 90 cm thick with wavy upper and irregular lower boundaries; clear irregular boundary. Lab sample # 03N01264

Bq--105 to 200 centimeters; dark reddish brown (5YR 3/2) broken face extremely gravelly ashy loamy sand, brown (7.5YR 4/2) broken face, dry; 82 percent sand; 0 percent clay; structureless massive; extremely firm, very hard, moderately cemented by silica, nonsticky, nonplastic; very high excavation difficulty; very few fine roots throughout and few very fine roots throughout; many very fine low-continuity interstitial pores; 4 percent nonflat subangular strongly cemented 76- to 250- millimeter durinodes and 6 percent nonflat subangular indurated 76- to 250-millimeter andesite fragments and 10 percent nonflat subrounded weakly cemented 2- to 10-millimeter durinodes and 30 percent nonflat subangular indurated 2- to 75-millimeter andesite fragments and 30 percent nonflat subrounded moderately cemented 2- to 75-millimeter durinodes; 1.2 grams/cc field bulk density; neutral, pH 6.6, Bromthymol blue.. Depth to duripan varies from 80 to 160 cm. 160 cm is in vertical fractures, 80 cm is near top of hightes moundsl. Boundary has irregular topography with 50 to 100 cm between vertical fractures.