LOCATION QUAKENASP WY
Tentative Series
Rev. JGM-RJS
10/2013
QUAKENASP SERIES
The Quakenasp series consists of very deep, well drained soils that formed in colluvium derived from limestone or interbedded shale and sandstone. These soils occur on hills. Slopes are 20 to 35 percent. Mean annual precipitation is about 530 mm and mean annual air temperature is about 3.0 degrees C.
TAXONOMIC CLASS: Fine, smectitic Vertic Argicryolls
TYPICAL PEDON: Quakenasp loam, on woodland (colors are for dry soil unless otherwise noted).
Oe--0 to 8 cm; moderately decomposed aspen leaves and twigs. (5 to 10 cm thick)
A--8 to 34 cm; very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; many fine, and common medium and coarse roots; common very fine and fine irregular pores; 8 percent subangular limestone gravel; neutral (pH 7.0); clear smooth boundary. (20 to 35 cm thick)
Btk1--34 to 47 cm; reddish brown (5YR 4/4) clay loam, reddish brown (5YR 4/3) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; moderately hard, firm, moderately sticky and moderately plastic; 15 percent reddish brown (2.5YR 5/4) and 5 percent grayish brown (2.5Y 5/2) mottles in the matrix; common fine, medium, and coarse roots; common very fine, and few fine and medium dendritic tubular pores; 15 percent prominent clay films on all faces of peds; 10 percent subangular limestone gravel; finely disseminated calcium carbonate; slightly effervescent; moderately alkaline (pH 8.0); clear smooth boundary.
Btk2--47 to 82 cm; reddish brown (2.5YR 5/3) clay, reddish brown (2.5YR 4/3) moist; moderate medium subangular blocky structure; moderately hard, firm, moderately sticky and very plastic; 5 percent light olive brown (2.5Y 5/3) mottles in the matrix; common very fine and fine, and few medium roots; few very fine, fine and medium dendritic tubular pores; 20 percent faint clay films on all faces of peds; 4 percent medium distinct irregular carbonate masses in the matrix, and finely disseminated calcium carbonate; strongly effervescent ; moderately alkaline (pH 8.2); clear smooth boundary. (combined thickness of Btk1, Btk2 horizons - 30 to 70 cm)
C--82 to 200 cm; reddish brown (2.5YR 4/4) clay, dark reddish brown (2.5YR 3/4) moist; massive; moderately hard, very firm, moderately sticky and very plastic; 10 percent light olive brown (2.5Y 5/3) mottles in the matrix; few very fine and fine roots; few very fine and fine dendritic tubular pores; finely disseminated calcium carbonate; strongly effervescent; moderately alkaline (pH 8.2).
TYPE LOCATION: Lincoln County, Wyoming; 41 degrees 53 minutes 24.90 seconds north latitude and 110 degrees 48 minutes 1.10 seconds west longitude.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 3.0 to 5.5 degrees C.
Thickness of mollic epipedon - 20 to 35 cm
Depth to argillic horizon - 25 to 40 cm
Thickness of argillic horizon - 30 to 70 cm
Depth to secondary calcium carbonate accumulation - 25 to 40 cm
A horizon
Hue: 5YR to 10YR; dry or moist
Value: 2 to 4 dry; 2 or 3 moist
Chroma: 2 to 3; dry or moist
Clay content: 18 to 26 percent
Rock fragments: 0 to 15 percent gravel
Reaction: pH 6.6 to 7.2
Btk1, Btk2 horizons
Hue: 2.5YR to 7.5YR; dry or moist
Value: 4 or 5 dry; 3 or 4 moist
Chroma: 3 or 4; dry or moist
Texture: clay loam, clay
Clay content: 35 to 50 percent
Rock fragments: 0 to 15 percent gravel
Calcium carbonate equivalent: 5 to 15 percent
Reaction: pH 8.0 to 8.6
C horizon
Hue: 2.5YR to 7.5YR; dry or moist
Value: 4 to 6 dry; 3 to 5 moist
Chroma: 3 or 4; dry or moist
Texture: clay loam, clay
Clay content: 35 to 45 percent
Calcium carbonate equivalent: 5 to 15 percent
Reaction: pH 8.0 to 8.6
COMPETING SERIES:
Beaverdam (ID) - do not have secondary calcium carbonate accumulations
Buckskin (ID) - do not have secondary calcium carbonate accumulations
Chicken (MT) - are moderately deep to a paralithic contact
Cimarron (CO) - do not have secondary calcium carbonate accumulations
Cooperwash (NV) - have a xeric soil moisture regime
Cucharas (CO) - are moderately deep to a paralithic contact
Gourley (CO) - depth to secondary calcium carbonate accumulations are greater than 50 cm
Hairpin (MT) - do not have secondary calcium carbonate accumulations
Heathcoat (ID) - have a xeric soil moisture regime
Helmet (CO) - do not have secondary calcium carbonate accumulations
Savar (WY) - have an ustic soil moisture regime
Slights (ID) - have a xeric soil moisture regime
Sudduth (CO) - do not have secondary calcium carbonate accumulations
Sudpeak (ID) - do not have secondary calcium carbonate accumulations
Toponce (ID) - do not have secondary calcium carbonate accumulations
Wetopa (CO) - do not have secondary calcium carbonate accumulations
Youman (CO) - do not have secondary calcium carbonate accumulations
GEOGRAPHIC SETTING:
Landform - hills
Elevation - 2,200 to 2,400 meters
Slope - 20 to 35 percent
Parent Material - colluvium derived from limestone or interbedded shale and sandstone
Climate - long, cold winters; short, cool summers
Mean annual precipitation - 450 to 600 mm with peak periods of precipitation occurring from March to June
Relative effective annual precipitation - 600 to 750 mm (due to additional snow accumulation from wind on sheltered slopes)
Mean annual air temperature - 2.0 to 4.5 degrees C.
Frost-free period - 20 to 40 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND PERMEABILITY: Well drained; slow permeability.
USE AND VEGETATION: Quakenasp soils are primarily used for wildlife habitat. The potential native vegetation may include quaking aspen with an understory of snowberry.
DISTRIBUTION AND EXTENT: Quakenasp soils are of small extent in southwestern Wyoming. MLRA - 47.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana.
SERIES PROPOSED: Lincoln County, Wyoming, 2013. The series name is coined.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - 8 to 34 cm (A horizon)
Argillic horizon - 34 to 82 cm (Btk1, Btk2 horizons)
Secondary calcium carbonates - 34 to 82 cm (Btk1, Btk2 horizons)
Particle-size control section - 34 to 82 cm (Btk1, Btk2 horizons)
Quakenasp soils have a cryic temperature regime and an udic moisture regime.
National Cooperative Soil Survey
U.S.A.