LOCATION SHORTCREEK OR
Tentative Series
Rev. CEG
03/2025
SHORTCREEK SERIES
Landscape--Intermontane Basin
Landform--distal ends of alluvial fans, floodplain steps
Slope--0 to 2 percent
Parent material--alluvium from volcanic ash and glacial outwash
Mean annual precipitation--about 1,000 mm
Mean annual air temperature--about 5 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--aquic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Ashy over loamy, glassy over isotic, nonacid Aquandic Cryaquepts
TYPICAL PEDON: Shortcreek mucky ashy fine sandy loam on the distal end of an outwash fan in an intermixed hardwood and coniferous forest with a slope of 2 percent and an elevation of 1274 m
Oi--0 to 1 cm; mucky peat, very dark grayish brown (10YR 3/2) dry, very dark brown (10YR 2/2) moist; moderate medium granular structure; very friable, slightly hard, nonsticky and nonplastic; slightly acid (pH 6.5); abrupt smooth boundary
A--1 to 12 cm; mucky ashy fine sandy loam, dark gray (10YR 4/1) dry, black (10YR 2/1) moist; moderate medium and coarse subangular blocky structure; very friable, slightly hard, nonsticky and nonplastic; common very fine and fine and few medium roots throughout; common fine dendritic tubular pores; slightly acid (pH 6.4); clear wavy boundary
Bg--12 to 55 cm; ashy loam, grayish brown (10YR 5/2) dry, dark grayish brown (10YR 4/2) moist; weak medium subangular blocky structure; very friable, moderately hard, slightly sticky and slightly plastic; few very fine, fine, and medium roots throughout; few fine dendritic tubular pores; 4 percent fine and medium iron-manganese masses with clear boundaries in matrix, distinct brown (7.5YR 4/4) moist; 5 percent gravel and 1 percent cobbles; slightly acid (pH 6.2); gradual smooth boundary
Cg1--55 to 125 cm; ashy loam, gray (10YR 6/1) dry, dark grayish brown (10YR 4/2) moist; massive; very friable, slightly hard, slightly sticky and slightly plastic; few fine roots throughout; few fine dendritic tubular pores; 5 percent fine and medium distinct iron-manganese masses with diffuse boundaries in matrix, brown (7.5YR 4/4) moist; 2 percent gravel and 1 percent cobbles; slightly acid (pH 6.4); clear wavy boundary
Cg2--125 to 200 cm; very gravelly ashy loam, gray (10YR 6/1) dry, dark grayish brown (10YR 4/2) moist; massive; very friable, slightly hard, slightly sticky and slightly plastic; few fine roots throughout; 2 percent fine and medium distinct iron-manganese masses with diffuse boundaries in matrix, brown (7.5YR 4/4) moist; 40 percent gravel and 2 percent cobbles; slightly acid (pH 6.5)
TYPE LOCATION: Klamath County, Oregon; about 6.4 miles south and 4.0 miles west of the town of Fort Klamath, OR; about 530 m north and 380 m west of the southeast corner of sec. 14, T.34S., R.6E., Willamette Meridian; Crystal Spring, Oregon USGS quadrangle; latitude 42.6099526 degrees north, longitude 122.0765222 degrees west, datum WGS84 (coordinates derived from gps unit)
RANGE IN CHARACTERISTICS:
*Mean annual soil temperature-- 3 to 8 degrees C
*Moisture control section--20 to 60 cm; saturated in all parts for 30 to 60 days from February through July, dry or moist in all parts between October through December.
*Rock fragment type--pumice paragravel; volcanic rock gravel
*Depth to redoximorphic features--0 to 50 cm from the mineral soil surface
Particle-size control section
*Rock fragment content, weighted average--0 to 10 percent
*Pararock fragment content, weighted average--0 to 5 percent
*Clay content--5 to 18 percent
Estimated properties within the particle-size control section
*Volcanic glass content--30 to 80 percent in the upper part; 5 to 25 percent in the lower part
*Medium to very coarse sand in the .02 to 2.0 mm fraction--less than 50 percent
*Ammonium oxalate extractable Al+1/2Fe--0.2 to 0.4 percent
*P-retention--less than 25 percent
*1/3-bar bulk density--1.0 to 1.35 g/cm3
*1500 kPa water (air-dried samples)--3 to 12 percent
*[(Al+1/2Fe)*15.65)]+glass--40 to 80 percent in the upper part; 5 to 30 percent in the lower part
O horizons (Oi and/or Oe)
Fine-earth texture--peat or mucky peat (from needles, leaves and twigs)
Thickness (combined)--1 to 15 cm
A horizons
Hue--2.5Y or 10YR, moist or dry
Value--2 to 3 moist, 3 to 5 dry
Chroma--1 to 2 moist, 1 to 3 dry
Fine-earth texture--mucky ashy loamy sand, mucky ashy fine sandy loam, mucky ashy loam
Clay content--5 to 20 percent
Total rock and pararock content--0 to 8 percent
Paragravel content--0 to 2 percent
gravel content--0 to 6 percent
cobble content--0 to 2 percent
Reaction--moderately acid to neutral (pH 5.6 to 7.3)
Thickness--10 to 25 cm
Bg horizons (or Bw horizons, present in some pedons)
Hue--2.5Y or 10YR, moist or dry
Value--4 to 8 moist, 5 to 8 dry
Chroma--1 or 2 moist or dry
Fine-earth texture--ashy sandy loam, ashy fine sandy loam, ashy loam, ashy silt loam, ashy diatomaceous silt loam
Clay content--5 to 25 percent
Total rock and pararock content--0 to 14 percent
Paragravel content--0 to 5 percent
gravel content--0 to 8 percent
cobble content--0 to 2 percent
Reaction--moderately acid to slightly acid (pH 5.6 to 6.5)
Thickness--greater than 15 cm
Cg horizons (where present)
Hue--2.5Y or 10YR, moist or dry
Value--4 to 6 moist, 6 or 7 dry
Chroma--1 or 2 moist or dry
Fine-earth texture--ashy loamy sand, ashy sandy loam, ashy fine sandy loam, ashy loam
Clay content--5 to 25 percent
Total rock and pararock content--0 to 55 percent
Paragravel content--0 to 5 percent
gravel content--0 to 50 percent
cobble content--0 to 35 percent
stone content--0 to 5 percent
Reaction--moderately acid to slightly acid (pH 5.6 to 6.5)
COMPETING SERIES:
There are no competing series
GEOGRAPHIC SETTING:
Elevation--1250 to 1950 m
Climate-- cold, wet winters and cool summers
Mean annual air temperature--3 to 7 degrees C
Mean annual precipitation--460 to 1700 mm
Frost-free period--10 to 40 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Mighty--pumiceous or ashy-pumiceous over loamy; alluvium derived from loamy volcanic ash over sandy alluvium derived from coarse pumiceous volcanic ash over silty and loamy alluvium derived from volcanic rock; on drainageways
Tater--medial-skeletal; umbric epipedon; water table below 200 cm year-round (well drained); on outwash fans
Tatersoup--medial-skeletal; mollic epipedon; seasonally high water table between 100 and 150 cm below the surface (moderately well drained); on outwash fans
Chemult--loamy over ashy or ashy-pumiceous; histic epipedon; grassy organic material over diatomaceous earth over alluvium from pumice; on floodplains
Kyotesue-- medial-skeletal; water table below 200 cm year-round (well drained); on moraines
Chock--ashy particle size class; alluvium derived from pumice; on flood plains on valley floors
Hoxie--fine-silty particle size class; lacustrine material, including diatomaceous sediments, mixed with volcanic ash; on marshes and depressions
Chinchallo--loamy over ashy or ashy-pumiceous; diatomaceous alluvium and lacustrine sediments over coarse pumiceous volcanic ash and tephra; on floodplains and floodplain steps
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--poorly drained
Seasonal high water table, endosaturation--0 to 100 cm, January through May
Ponding--frequent, very long; April through June
Saturated hydraulic conductivity--moderately high or high in the upper part, moderately high to very high in the lower part
USE AND VEGETATION:
Use--timber production, forest grazing, wildlife habitat
Vegetation--Engelmann spruce, lodgepole pine, willow, Douglas spirea, bog blueberry, sedges
DISTRIBUTION AND EXTENT: Cascade Mountains, Eastern Slope, Oregon; MLRA 6; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED:
Klamath County, Northern Part, Oregon, 2018
Origin of the name--named after a nearby creek, Short Creek
REMARKS:
Diagnostic horizons and features in this pedon
*Particle-size control section--the zone from 26 to 101 cm
*Ochric epipedon
*Cambic horizon--zone from 12 to 55 cm
*Aquic conditions--the conditions of endosaturation and reduction between the soil surface and 200 cm
*Redoximorphic concentrations--the zone from 12 to 200 cm
*Depleted matrix--the zone from 12 to 200 cm
ADDITIONAL DATA:
NASIS SITE ID--2018OR0353009
NASIS PEDON ID--2018OR0353009
Kellogg Soil Survey Laboratory (KSSL) data are available on a similar soil (NASIS pedon and site ID S2018OR035005; KSSL pedon no. 19N0332)
National Cooperative Soil Survey
U.S.A.