LOCATION WHISTLECREEK WY
Tentative Series
IRD. IGC-JCK
03/2017
WHISTLECREEK SERIES
The Whistlecreek series consist of very deep, very poorly drained soils that formed in alluvium. These soils are on flood plains. Slopes are from 0 to 4 percent. Mean annual precipitation is about 191 mm, and mean annual air temperature is about 7 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, nonacid, mesic Typic Fluvaquents
TYPICAL PEDON: Whistlecreek clay loam, 1 percent slope in rangeland at an elevation of 1,442 meters. (Colors are for moist soil unless otherwise noted.)
A--0 to 11 cm; dark yellowish brown (10YR 4/4) clay loam, yellowish brown (10YR 5/4) dry; weak fine granular structure; soft, very friable, moderately sticky and moderately plastic; common very fine roots throughout; 3 percent fine 7.5YR 6/6 iron oxidized masses; slightly effervescent; slightly alkaline (pH 7.6); clear smooth boundary. (5 to 15 cm thick)
C1--11 to 23 cm; dark yellowish brown (10YR 4/4) clay loam, yellowish brown (10YR 5/6) dry; massive; soft, very friable, moderately sticky and moderately plastic; few very fine roots throughout, few very fine dendritic tubular pores; 5 percent fine 7.5YR 6/6 oxidized iron masses and 2 percent fine 2.5Y 7/2 iron depletions; slightly effervescent; slightly alkaline (pH 7.7); clear smooth boundary. (10 to 25 cm thick)
C2--23 to 30 cm; brown (10YR 4/3) sandy loam, brown (10YR 5/3) dry; massive; soft, very friable, slightly sticky and slightly plastic; few very fine roots throughout; 10 percent fine 7.5YR 6/6 oxidized iron masses and 5 percent fine 2.5Y 6/2 iron depletions; slightly effervescent; slightly alkaline (pH 7.8); clear smooth boundary. (5 to 20 cm thick)
Cg1--30 to 39 cm; very dark gray (10YR 3/1) clay loam, dark gray (10YR 4/1) dry; massive; soft, very friable, moderately sticky and moderately plastic; few very fine roots throughout; 5 percent fine 7.5YR 5/6 oxidized iron masses and 15 percent fine 2.5Y 6/1 iron depletions; slightly effervescent; slightly alkaline (pH 7.8); clear smooth boundary. (0 to 25 cm thick)
Cg2--39 to 200 cm; very dark gray (10YR 3/1) very gravelly sandy loam, dark gray (10YR 4/1) dry; single grain; loose, nonsticky and nonplastic; 2 percent fine 7.5YR 5/6 oxidized iron masses and 25 percent fine 2.5Y 6/1 iron depletions; 30 percent gravel and 20 percent cobbles; slightly alkaline (pH 7.5); clear smooth boundary.
TYPE LOCATION: Park county Wyoming; 707 meters south and 175 meters east of the northwest corner of section 24, T. 52N., R. 98W.; YU Bench NE USGS quadrangle; latitude 44 degrees 27 minutes 58.23 seconds N. and longitude 108 degrees 35 minutes 29.97 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 8 to 10 degrees C
Depth to seasonal high water table - 0 to 30 cm
A horizon
Hue: 10YR or 2.5Y
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 3 or 4
Texture: clay loam, loam or sandy clay loam
Clay content: 18 to 32 percent
Rock fragments: 0 to 15 percent gravel or cobbles
Reaction: 7.0 to 7.8
C1 horizon
Hue: 10YR to 2.5Y
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 3, 4 or 6
Texture: clay loam, loam or sandy clay loam
Clay content: 20 to 35 percent
Rock fragments: 0 to 15 percent gravel or cobbles
Reaction: 7.4 to 8.0
C2 horizon
Hue: 10YR to 2.5Y
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 3 or 4
Texture: sandy loam, fine sandy loam or very fine sandy loam
Clay content: 12 to 18 percent
Rock fragments: 0 to 15 percent gravel or cobbles
Reaction: 7.4 to 8.0
Cg1 horizon
Hue: 10YR to 2.5Y
Value: 4 or 5 dry; 3 or 4 moist
Chroma: 1 or 2
Texture: clay loam, loam or sandy clay loam
Clay content: 18 to 35 percent
Rock fragments: 0 to 15 percent gravel or cobbles
Reaction: 7.4 to 8.0
Cg2 horizon
Hue: 10YR to 2.5Y
Value: 4 or 5 dry; 3 or 4 moist
Chroma: 1 or 2
Texture: sandy loam, fine sandy loam or very fine sandy loam
Clay content: 8 to 18 percent
Rock fragments: 35 to 70 percent: 25 to 60 percent gravel; 15 to 35 percent cobbles
Reaction: 7.0 to 7.8
COMPETING SERIES: There are no competing soil series.
GEOGRAPHIC SETTING:
Landform - flood plains
Elevation - 1,085 - 1,500 meters
Slope - 0 to 4 percent slopes
Parent material - alluvium
Mean annual precipitation - 127 to 229 mm
Mean annual air temperature - 6 to 8 degrees C
Frost-free period - 110 to 150 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND PERMEABILITY: Very poorly drained; moderate to moderately slow permeability.
USE AND VEGETATION: Whistlecreek soils are used mainly for wildlife and livestock grazing. Native vegetation is alkali cordgrass, mountain rush, American bulrush, Nebraska sedge, and water sedge.
DISTRIBUTION AND EXTENT: Whistlecreek soils are of small extent in northwestern Wyoming. MLRA 32.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Park County, Wyoming; 2016. The name is taken from a local stream.
REMARKS:
Ochric epipedon - from 0 to 11 cm (A horizon)
Redoximorphic concentrations - from 0 to 200 cm (A, C1, C2, Cg1 and Cg2 horizons)
Redoximorphic depletions - from 11 to 200 cm (C1, C2, Cg1 and Cg2 horizons)
Particle-size control section - from 25 to 100 cm (part of the C2, Cg1 and Cg2 horizons)
Whistlecreek soils have a mesic temperature regime and an aquic moisture regime.
National Cooperative Soil Survey
U.S.A.