LOCATION TELEFLAT OR
Tentative Series
Rev. CEG/MPR
02/2025
TELEFLAT SERIES
Landscape--Intermontane Basin
Landform--floodplain
Slope--0 to 2 percent
Parent material--alluvium
Mean annual precipitation--about 700 mm
Mean annual air temperature--about 6 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--aquic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Fine, smectitic Aquandic Cryaquolls
TYPICAL PEDON: Teleflat muck, grassland, on a 0.5 percent slope at 1525 m elevation.
Oa--0 to 8 cm; highly decomposed plant material, very dark gray (10YR 3/1) dry, very dark brown (10YR 2/2) moist; moderate fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine and fine roots; many fine irregular and common fine dendritic tubular pores; neutral (pH 6.8); clear smooth boundary
A--8 to 20 cm; silty clay loam, very dark gray (10YR 3/1) dry, black (10YR 2/1) moist; strong medium subangular blocky structure; very hard, friable, moderately sticky and moderately plastic; common very fine and fine roots; very few fine irregular and common fine dendritic tubular pores; 30 percent distinct silt coats on all faces of peds, black (10YR 2/1) moist; slightly acid (pH 6.5); clear smooth boundary
AB--20 to 40 cm; silty clay, gray (10YR 5/1) dry, very dark brown (10YR 2/2) moist; strong medium and coarse subangular blocky structure; very hard, friable, moderately sticky and moderately plastic; few very fine and fine roots; few fine dendritic tubular pores; 30 percent distinct silt coats on all faces of peds, black (10YR 2/1) moist; neutral (pH 6.6); gradual smooth boundary
2ABg--40 to 60 cm; ashy loam, 70 percent gray (10YR 5/1) dry, very dark grayish brown (10YR 3/2) moist, and 30 percent gray (10YR 6/1) dry, dark grayish brown (10YR 4/2) moist; weak medium subangular blocky structure; moderately hard, friable, slightly sticky and slightly plastic; few very fine and fine roots; few fine dendritic tubular pores; neutral (pH 6.6); gradual smooth boundary
2Bg--60 to 70 cm; ashy sandy clay loam, 80 percent gray (10YR 6/1) dry, dark grayish brown (10YR 4/2) moist, and 20 percent gray (10YR 5/1) dry, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; moderately hard, friable, slightly sticky and nonplastic; few very fine and fine roots; few fine dendritic tubular pores; 2 percent fine and medium prominent irregular iron-manganese masses with diffuse boundaries in matrix, dark yellowish brown (10YR 3/6), moist; 2 percent volcanic rock gravel; neutral (pH 6.7); clear smooth boundary
3Btss--70 to 110 cm; clay, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 4/4) moist; strong medium subangular blocky structure; very hard, friable, slightly sticky and moderately plastic; 10 percent prominent slickensides on all faces of peds and 25 percent prominent clay films on all faces of peds; 2 percent fine distinct iron-manganese nodules in matrix, black (7.5YR 2.5/1) moist, and 5 percent fine distinct iron-manganese masses in matrix, strong brown (7.5YR 4/6) moist,; 2 percent gravel; neutral (pH 6.8); clear smooth boundary
4Btq--110 to 125 cm; very gravelly clay, brown (10YR 5/3) dry, dark yellowish brown (10YR 4/4) moist; moderate medium subangular blocky structure; very hard, friable, slightly sticky and moderately plastic; 5 percent prominent clay films on all faces of peds and on rock fragments; 2 percent fine iron-manganese nodules in matrix, black (7.5YR 2.5/1) moist, and 5 percent fine faint iron-manganese masses in matrix, dark brown (7.5YR 3/4) moist; 5 percent fine distinct moderately coherent silica masses around rock fragments and in matrix; 5 percent cobbles and 40 percent gravel; neutral (pH 6.9)
4Bq--125 to 200 cm; gravelly sandy clay loam, brown (7.5YR 5/4) dry, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; 5 percent fine distinct iron-manganese nodules in matrix, black (7.5YR 2.5/1) moist, 2 percent fine distinct iron-manganese masses in matrix, dark yellowish brown (10YR 4/6) moist; 5 percent fine distinct irregular moderately coherent silica masses around rock fragments and in matrix; 5 percent cobbles and 25 percent gravel; neutral (pH 6.9)
TYPE LOCATION: Klamath County, Oregon; about 7.1 miles south and 1.1 mile east of the town of Chiloquin, Oregon; about 137 m north and 293 m west of the southeast corner of Section 2, Township 36 S, Range 7 E; Willamette Meridian; Modoc Point, Oregon U. S. Geological Survey quadrangle; latitude 42.4730444 degrees north, longitude 121.8417778 degrees west, datum WGS 84 (coordinates derived from GPS unit)
RANGE IN CHARACTERISTICS:
Soil Temperature: cryic regime
Mean annual soil temperature-- 3.0 to 8.0 degrees C
Moisture control section--10 to 30 cm; aquic regime; saturated in some part for 30 to 90 days from March through June; seasonally high water table (episaturation) has an upper limit between 0 and 40 cm below the surface in normal years
Thickness of mollic epipedon--50 to 90 cm
Rock fragments--volcanic rock gravel, dominantly andesite or basalt
Depth to redox concentrations--5 to 50 cm
Depth to aquic conditions--5 to 50 cm
Depth to lithologic discontinuity with aquandic materials (the top of the 2ABg horizon)--15 to 90 cm
Depth to lithologic discontinuity with clayey materials (the top of the 3Btssg horizon)--50 to 100 cm
Depth to lithologic discontinuity with skeletal materials (the top of the 4Btqg horizon, when present)--90 to 150 cm
Particle-size control section
*Clay content--35 to 50 percent (weighted average)
*rock fragment content--0 to 2 percent
Estimated properties, horizons meeting aquandic subgroup criteria (2ABg and 2Bg horizons):
*Ammonium oxalate extractable Al plus 1/2 Fe--0.2 to 0.7 percent
*Medium to very coarse sand in the .02 to 2.0 mm fraction--greater than 50 percent
*P-retention--3 to 20 percent
*Volcanic glass content--5 to 60 percent glass and glass-coated aggregate
*1/3-bar bulk density--0.75 to 1.10 g/cm3
*1500 kPa water (air-dried samples)--5 to 25 percent
Oa horizon
*Thickness--5 to 10 cm
A and AB horizons
Hue--7.5YR, 10YR, or 2.5Y moist, 10YR or 2.5Y dry
Value--2, 2.5, or 3 moist, 3 to 5 dry
Chroma--1 or 2, moist or dry
Fine-earth texture--silt loam, clay loam, silty clay loam, silty clay, clay
Clay content--15 to 50 percent
Gravel content--0 to 2 percent
Organic matter content--1 to 10 percent
Reaction--slightly acid to neutral (pH 6.1 to 7.3)
Thickness--50 to 90 cm, cumulative
2ABg horizon (when present)
Hue--7.5YR, 10YR, or 2.5Y moist, 10YR or 2.5Y dry
Value--2.5, 3 or 4 moist, 5 to 7 dry
Chroma--1 or 2, moist or dry
Fine-earth texture--ashy coarse sandy loam, ashy loam, ashy sandy clay loam
Clay content--10 to 27 percent
Gravel content--0 to 2 percent
Organic matter content--0.5 to 4 percent
Reaction--neutral (pH 6.6 to 7.3)
Thickness--0 to 50 cm
2Bg horizon (when present)
Hue--10YR, or 2.5Y moist, 10YR or 2.5Y dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 to 3, moist or dry
Fine-earth texture--ashy coarse sandy loam, ashy loam, ashy sandy clay loam
Clay content--10 to 27 percent
Gravel content--0 to 2 percent
Organic matter content--0.1 to 2 percent
Reaction--neutral to slightly alkaline (pH 6.6 to 7.8)
Thickness--0 to 50 cm
3Btss horizon
Hue--10YR or 2.5Y, moist or dry
Value--4 or 5 moist, 4 to 7 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--silty clay loam, clay loam, silty clay, clay
Clay content--35 to 50 percent
Gravel content--0 to 12 percent
Organic matter content--0.1 to 1 percent
Reaction--neutral to slightly alkaline (pH 6.6 to 7.8)
Thickness--25 to 100 cm
4Btq horizons (when present)
Hue--7.5 YR or 10YR or 2.5Y, moist or dry
Value--4 to 7 moist, 4 to 8 dry
Chroma--1 to 6 moist, 1 to 4 dry
Fine-earth texture--clay loam, clay
Clay content--20 to 50 percent
Total rock fragment content--30 to 50 percent
Gravel content--20 to 45 percent
Cobble content--0 to 5 percent
Organic matter content--0.1 to 1 percent
Reaction--neutral to slightly alkaline (pH 6.6 to 7.8)
Thickness--0 to 100 cm
4Bq horizons (when present)
Hue--7.5 YR or 10YR or 2.5Y, moist or dry
Value--4 to 7 moist, 4 to 8 dry
Chroma--1 to 6 moist, 1 to 4 dry
Fine-earth texture--loam, sandy clay loam
Clay content--20 to 35 percent
Total rock fragment content--20 to 55 percent
Gravel content--20 to 50 percent
Cobble content--0 to 5 percent
Organic matter content--0.1 to 1 percent
Reaction--neutral to slightly alkaline (pH 6.6 to 7.8)
COMPETING SERIES:
There are no competing series
GEOGRAPHIC SETTING:
Elevation--1270 to 1790 m
Climate--cold, moist winters and cool, dry summers
Mean annual air temperature-- 4 to 7 degrees C
Mean annual precipitation--355 to 890 mm
Frost-free period--40 to 60 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Maset--on low hills, rock pediments, dip slopes, and volcanic fields; moisture control section is unsaturated throughout the year (well drained); ochric epipedon; frigid soil temperature regime; contact with tuffaceous sandstone between 50 and 100 cm (moderately deep)
Oharseven--on alluvial fans and floodplain steps; moisture control section is unsaturated throughout the year except for some years where it is saturated for less than 60 days in the winter and early spring (moderately well drained); ochric epipedon; duripan between 50 and 100 cm (moderately deep)
Ontko--on flood plains; seasonal high water table and redoximorphic features at the soil surface (poorly drained); endosaturation only (no episaturation); mollic epipedon less than 50 cm thick; fine-loamy particle-size class
Spragueriver--on drainageways and flood plains; seasonal high water table and redoximorphic features at the soil surface (poorly drained); endosaturation (no episaturation); mollic epipedon greater than 100 cm thick; fine-loamy particle-size class
DRAINAGE AND PERMEABILITY:
Drainage class--poorly drained
Saturation in normal years--episaturation above clayey textures (the 3Btssg horizon) with an upper limit between 0 and 40 cm from the soil surface, for 30 or more days in March through June
Flooding--frequent, long flooding, March through May
Ponding--frequent, long ponding, to a depth of up to 30 cm, March through June
Saturated hydraulic conductivity (Ksat)--moderately low to high in the A and AB horizons; moderately high to high in the 2ABg and 2Bg horizons; low to moderately high in the 3Btss horizon; moderately low to moderately high in the 4Btq and 4Bq horizons
USE AND VEGETATION:
Use--native meadow hay and pasture, and wildlife
Vegetation--tufted hairgrass, rush, sedge, and Kentucky bluegrass
DISTRIBUTION AND EXTENT: Cascade Mountains, Eastern Slope, Oregon; MLRA 6; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED:
Klamath County, Oregon, 2012
Origin of the name--the name is coined; derived from the name of the area in which this soil is typified, "Telephone Flat"
REMARKS:
Diagnostic horizons and features in this pedon
*Mollic epipedon--zone from 8 to 60 cm
*Volcanic glass--zone from 40 to 70 cm
*Aquic conditions--zone from 0 to 70 cm
*Redoximorphic concentrations--zone from 60 to 150 cm
*Redoximorphic depletions--zone from 40 to 70 cm
*Particle-size control section--zone from 70 to 120 cm
*Argillic horizon--zone from 70 to 125 cm
*Depth to lithologic discontinuities--40 cm, 70 cm, and 110 cm
ADDITIONAL DATA:
NASIS Site and Pedon ID--12OR035002
National Cooperative Soil Survey
U.S.A.