LOCATION MARESEGG OR
Tentative Series
Rev. JFD/TDT/CEG
01/2024
MARESEGG SERIES
Landscape--Intermontane basin
Landform--stream terraces and flood-plain steps on valley floors
Slope--0 to 2 percent
Parent material--alluvium derived from volcanic rock, volcanic ash, and pumiceous tephra
Mean annual precipitation--about 700 mm
Mean annual air temperature--about 6 degrees C
Depth class--very deep
Drainage class--somewhat poorly drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--aquic
TAXONOMIC CLASS: Ashy, glassy Aquic Vitricryands
TYPICAL PEDON: Maresegg ashy loamy coarse sand - woodland, on a 1 percent slope at 1279 m elevation; when described on 7/11/2005, the soil was moist between 0 and 125 cm and wet between 125 and 200 cm.
Oi --0 to 2 cm; slightly decomposed plant material composed of needles, cones, twigs, and leaves; very strongly acid (pH 5.0); abrupt smooth boundary
Oe--2 to 4 cm; moderately decomposed plant material composed of needles, cones, twigs, and leaves; few fine and common medium roots throughout; very strongly acid (pH 5.0); abrupt wavy boundary
Oa--4 to 8 cm; highly decomposed plant material composed of needles, cones, twigs, and leaves; few fine and common medium roots throughout; very strongly acid (pH 5.0); abrupt wavy boundary
A--8 to 40 cm; ashy loamy coarse sand, brown (10YR 5/3) dry, dark brown (10YR 3/3) moist; weak coarse subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and few fine and medium roots throughout; many very fine and common fine irregular pores; 10 percent fine to medium pumice paragravel; moderately acid (pH 5.8); gradual wavy boundary
AB--40 to 70 cm; ashy loamy coarse sand, light yellowish brown (2.5Y 6/4) dry, dark yellowish brown (10YR 3/4) moist; weak very coarse subangular blocky structure; soft, very friable, nonsticky and nonplastic; few very fine, fine and medium roots throughout; many very fine and common fine irregular pores; 10 percent fine to medium pumice paragravel; moderately acid (pH 5.8); clear smooth boundary
Bg1--70 to 165 cm; ashy coarse sand, light brownish gray (2.5Y 6/2) dry, dark grayish brown (10YR 4/2) moist; massive; soft, very friable, nonsticky and nonplastic; many very fine and common fine irregular pores; 40 percent very coarse distinct irregular iron-manganese masses in matrix, light yellowish brown (10YR 6/4) dry, dark yellowish brown (10YR 4/4) moist; 1 percent fine to medium andesite gravel, and 10 percent fine to medium pumice paragravel; slightly acid (pH 6.1); clear smooth boundary
Bg2--165 to 200 cm; ashy coarse sand, light brownish gray (10YR 6/2) dry, dark grayish brown (10YR 4/2) moist; massive; soft, very friable, nonsticky and nonplastic; many very fine and common fine irregular pores; 40 percent coarse prominent irregular iron-manganese masses in matrix, yellowish brown (10YR 5/6) dry, dark yellowish brown (10YR 4/6) moist; 1 percent subrounded moderately coherent fine iron-manganese nodules, 1 percent fine andesite gravel, and 5 percent fine to medium pumice paragravel; neutral (pH 6.6)
TYPE LOCATION: Klamath County, Oregon; about 0.23 mile south and 4.1 miles west of the town of Fort Klamath; Mares Egg Spring, Oregon USGS quadrangle; about 155 m west and 555 m south of the northeast corner of section 23, T. 33 S., R. 6 E.; latitude 42.6997986 degrees north, longitude 122.0770035 west, datum WGS84 (coordinates determined with a gps unit).
RANGE IN CHARACTERISTICS:
Soil Temperature: cryic regime
Mean annual soil temperature-- 3 to 8 degrees C
Mean summer soil temperature-- 7 to 12 degrees C
Mean winter soil temperature-- 1 to 6 degrees C
Moisture control section--30 to 90 cm; udic regime bordering on aquic; usually moist, but dry in all parts for 30 to 45 consecutive days following the summer solstice; soils are endosaturated part of the time, with the highest water table occurring in March and April and having an upper limit between the surface and 90 cm; soils are not sufficiently saturated the remainder of the time to meet criteria for typic aquic moisture regime
Umbric epipedon--25 to 75 cm thick (can include AB horizon(s) in some pedons)
Depth to redox concentrations--50 to 100 cm
Depth to aquic conditions--50 to 100 cm
Particle-size control section
*Clay content--0 to 10 percent
*Rock fragment content--0 to 5 percent gravel
*Pararock fragment content--5 to 20 percent pumice paragravel
Estimated andic properties, all mineral horizons:
*Ammonium oxalate extractable Al plus 1/2 Fe--0.4 to 1.0 percent
*Medium to very coarse sand in the .02 to 2.0 mm fraction--greater than 50 percent
*P-retention--25 to 50 percent
*Volcanic glass content--30 to 70 percent glass and glass-coated aggregate
*1/3-bar bulk density--0.75 to 1.00 g/cm3
*1500 kPa water (air-dried samples)--3 to 12 percent
O horizons (Oi, Oe, and/or Oa, where present)
Reaction--very strongly acid to strongly acid (pH 4.5 to 5.5)
Thickness (combined)--0 to 10 cm
A horizon
Hue--7.5YR or 10YR, moist or dry
Value--2 or 3 moist, 4 or 5 dry
Chroma--2 or 3, moist or dry
Fine-earth texture--ashy loamy coarse sand, ashy loamy sand, ashy sandy loam
Clay content--1 to 10 percent
Total rock and pararock content--0 to 14 percent
Paragravel content--0 to 14 percent pumice paragravel
Gravel content--0 to 5 percent
Reaction--moderately acid or slightly acid (pH 5.6 to 6.5)
Thickness--10 to 45 cm
AB horizon (where present)
Hue--7.5YR or 10YR moist, 7.5YR to 2.5Y dry
Value--3 to 5 moist, 5 or 6 dry
Chroma--2 to 4 moist, 3 or 4 dry
Fine-earth texture--ashy loamy coarse sand, ashy loamy sand, ashy sandy loam
Clay content--1 to 10 percent
Total rock and pararock content--0 to 25 percent
Paragravel content--0 to 20 percent pumice paragravel
Gravel content--0 to 5 percent
Reaction--moderately acid or slightly acid (pH 5.6 to 6.5)
Thickness--0 to 75 cm
Bg or Bw (where present) horizons
Hue--7.5YR or 10YR moist, 7.5YR to 2.5Y dry
Value--3 to 6 moist, 6 or 7 dry
Chroma--2 to 6, moist or dry
Fine-earth texture--ashy coarse sand, ashy sand, ashy loamy coarse sand, ashy loamy sand
Clay content--0 to 10 percent
Total rock and pararock content--0 to 30 percent
Paragravel content--0 to 20 percent pumice paragravel
Iron-Manganese nodule content--0 to 5 percent, moderately cemented, gravel-sized
Gravel content--0 to 5 percent
Reaction--slightly acid or neutral (pH 6.1 to 7.3)
COMPETING SERIES:
Suncreek (tentative)--xeric moisture regime; ochric epipedon; greater than 5 percent rock fragments in the particle-size control section
GEOGRAPHIC SETTING:
Elevation--1250 to 1350 m
Climate--cold, wet winters and cool, dry summers
Mean annual air temperature-- about 4 to 7 degrees C
Mean annual precipitation--450 to 950 mm
Frost-free period--5 to 35 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Anniecreek--on flood plains and drainageways; upper depth of seasonal high water table and redoximorphic features is 50 cm (somewhat poorly drained); mollic epipedon
Chemult--on flood plains; seasonal high water table and aquic conditions at the soil surface (very poorly drained); organic and diatomaceous silt over pumiceous sands
Chock--on flood plains on valley floors; seasonal high water table and aquic conditions at or near the soil surface (poorly and very poorly drained)
Collier--on pyroclastic flows; sandy textures and no seasonal high water table (somewhat excessively drained)
Kirk--on flood plains on valley floors; upper depth of seasonal high water table and aquic conditions is 25 cm (poorly drained); ashy-pumiceous particle size class
Kyotesue--on moraines on mountains; medial loam and medial sandy loam textures and no seasonal high water table (well-drained); medial-skeletal particle size class
Suncreek--on alluvial fans; xeric moisture regime; upper depth of seasonal high water table and aquic conditions is 50 cm (somewhat poorly drained) greater than 5 percent rock fragments in the particle-size control section
DRAINAGE AND PERMEABILITY:
Drainage class--somewhat poorly drained
Saturation in normal years--endosaturation, with the highest water table occurring in March and April between the surface and 90 cm; endosaturation below a depth of 90 cm July through November
Flooding--none on stream terraces; frequent, long flooding in March and April on flood plain steps
Ponding--none
Saturated hydraulic conductivity (Ksat)--high to very high
USE AND VEGETATION:
Use--timber production, wildlife habitat
Vegetation--Engelmann spruce, lodgepole pine, white fir, serviceberry, rose spirea, queencup beadlily, twinflower, whiteveined wintergreen, northern bedstraw, widefruit sedge, blue wildrye
DISTRIBUTION AND EXTENT: Klamath and Shasta Valleys and Basins, Oregon; MLRA 21; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California
SERIES PROPOSED:
Klamath County Oregon, 2005
Origin of the name--USGS topographic quadrangle and nearby spring are named "Mares Egg Spring"
REMARKS:
Diagnostic horizons and features in this pedon
*Umbric epipedon--zone from 8 to 40 cm
*Andic soil properties--throughout (zone from 8 to 200 cm)
*Volcanic glass--throughout (zone from 8 to 200 cm)
*Aquic conditions--zone from 70 to 200 cm (Bg1 and Bg2 horizons)
*Redoximorphic features--zone from 70 to 200 cm (Bg1 and Bg2 horizons)
*Particle-size control section--zone from 8 to 108 cm (A and AB horizons, and part of the Bg1 horizon)
Andic soil properties based on data from the Steiger series (pedon S87OR-035-001) and Wickiup series (S03OR-035-013)
Pumice and ash are from Mt. Mazama
ADDITIONAL DATA:
NASIS Pedon ID--05OR683001
NASIS Site ID--05-JFD-01
National Cooperative Soil Survey
U.S.A.