LOCATION NARROWRIDGE WY
Tentative Series
Rev. DMM-DJP-RJS
02/2016
NARROWRIDGE SERIES
The Narrowridge series consists of very deep, well drained soils that formed in slope alluvium, colluvium and mass movement deposits derived from metamorphic and sedimentary rocks. These soils are on hillslopes, mountain slopes, eroded fan remnants and landslides. Slopes are 4 to 25 percent. Mean annual precipitation is about 450 mm, and mean annual air temperature is about 1.2 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Ustic Haplocryalfs
TYPICAL PEDON: Narrowridge very gravelly loam, in rangeland (colors are for dry soil unless otherwise noted).
A--0 to 12 cm; dark brown (7.5YR 3/3) very gravelly loam, very dark brown (7.5YR 2.5/3), moist; weak fine subangular blocky structure; friable, slightly hard, slightly sticky, slightly plastic; many very fine, fine, and common medium roots; many fine interstitial pores; finely disseminated carbonate; 35 percent gravel; slightly effervescent; slightly alkaline (pH 7.5); clear smooth boundary. (3 to 15 cm thick)
Btk1--12 to 38 cm; brown (7.5YR 5/4) very gravelly loam, brown (7.5YR 4/4), moist; weak medium subangular blocky structure; friable, slightly hard, slightly sticky, slightly plastic; common very fine, fine, and medium roots; many fine interstitial pores; 15 percent faint clay films on all faces of peds; 20 percent fine irregular carbonate masses in matrix; 2 percent stones, 3 percent cobbles and 35 percent gravel; strongly effervescent; moderately alkaline (pH 7.9); clear wavy boundary.
Btk2--38 to 54 cm; brown (7.5YR 5/4) very gravelly loam, brown (7.5YR 4/4), moist; moderate medium subangular blocky structure; friable, slightly hard, slightly sticky, slightly plastic; common very fine, fine and few medium roots; many fine interstitial pores; 35 percent distinct clay films on all faces of peds; 40 percent fine irregular carbonate masses in matrix; 2 percent stones and 3 percent cobbles and 35 percent gravel; strongly effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (combined thickness of Btk1 and Btk2 - 36 to 50 cm)
Btk3--54 to 80 cm; reddish brown (2.5YR 5/4) clay loam, red (2.5YR 4/6), moist; moderate medium subangular blocky structure; firm, moderately hard, moderately sticky, moderately plastic; common fine tubular pores; 15 percent distinct pressure faces on vertical faces of peds and 35 percent prominent clay films on all faces of peds; 40 percent fine irregular carbonate masses in matrix; 10 percent gravel; violently effervescent; strongly alkaline (pH 8.8); gradual wavy boundary.
Btk4--80 to 130 cm; reddish brown (2.5YR 5/4) clay, red (2.5YR 4/6), moist; moderate medium angular blocky structure; very firm, hard, very sticky, very plastic; common fine tubular pores; 15 percent faint clay films on all faces of peds; 40 percent fine irregular carbonate masses in matrix; 5 percent gravel; violently effervescent; strongly alkaline (pH 8.8); gradual wavy boundary. (combined thickness of Btk3 and Btk4 - 67 to 85 cm)
Bk--130 to 200 cm; reddish brown (2.5YR 5/4) clay loam, red (2.5YR 4/6), moist; massive; very firm, hard, moderately sticky, moderately plastic; common fine tubular pores; finely disseminated carbonate; 5 percent gravel; violently effervescent; strongly alkaline (pH 8.8).
TYPE LOCATION: Sublette County, Wyoming; USGS Pine Grove, Wyoming topographic quadrangle; 42 degrees 25 minutes 35.00 seconds north latitude and 110 degrees 23 minutes 16.00 seconds west longitude.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 1.5 to 4.0 degrees C.
Ochric epipedon thickness - 3 to 15 cm
Depth to argillic horizon - 3 to 15 cm
Depth to secondary carbonates - 3 to 15 cm
Depth to calcic horizon - 50 to 80 cm
A horizon
Hue: 5YR to 10YR; dry or moist
Value: 3 or 4 dry; 2 to 3 moist
Chroma: 2 or 3; dry or moist
Clay content: 15 to 26 percent
Rock fragments: 35 to 60 percent--35 to 60 percent gravel, 0 to 5 percent cobbles
Calcium carbonate equivalent: 0 to 5 percent
Reaction: pH 7.5 to 8.2
Btk1, Btk2 horizons
Hue: 5YR or 7.5YR; dry or moist
Value: 4 or 5; dry or moist
Chroma: 3 or 4; dry or moist
Texture: loam, clay loam, sandy clay loam
Clay content: 18 to 30 percent
Rock fragments: 35 to 60 percent--35 to 60 percent gravel, 0 to 5 percent cobbles, 0 to 5 percent stones
Calcium carbonate equivalent: 5 to 12 percent
Sodium adsorption ratio: 0 to 3
Reaction: pH 7.9 to 8.6
Btk3, Btk4 horizons
Hue: 2.5YR or 7.5YR; dry or moist
Value: 4 or 5; dry or moist
Chroma: 3 to 6; dry or moist
Texture: clay, clay loam
Clay content: 32 to 44 percent
Rock fragments: 5 to 20 percent--5 to 15 percent gravel, 0 to 5 percent cobbles
Calcium carbonate equivalent: 15 to 25 percent
Sodium adsorption ratio: 2 to 10
Reaction: pH 8.4 to 8.8
Bk horizons
Hue: 2.5YR or 5YR; dry or moist
Value: 4 or 5; dry or moist
Chroma: 3 to 6; dry or moist
Texture: loam, sandy clay loam, clay loam
Clay content: 15 to 35 percent
Rock fragments: 0 to 15 percent--0 to 10 percent gravel, 0 to 5 percent cobbles
Calcium carbonate equivalent: 5 to 15 percent
Sodium adsorption ratio: 2 to 10
Reaction: pH 8.4 to 8.8
COMPETING SERIES:
Cadotte (MT) - have a sandy-skeletal substratum
Cloud Peak (WY) - are moderately deep to a lithic contact
Cundiyo (NM) - do not have secondary carbonates
Edloe (CO) - are moderately deep to a lithic contact
Fulvance (CO) - do not have secondary carbonates
Goosepeak (CO) - do not have secondary carbonates
Guffey (CO) - are moderately deep to a paralithic contact
Hyatteville (WY) - are moderately deep to a lithic contact
Kimpton (MT) - are moderately deep to a lithic contact
Lake Creek (WY) - are moderately deep to a lithic contact
Lakehelen (WY) - are moderately deep to a lithic contact
Laveta (CO) - are moderately deep to a lithic contact
Lulude (CO) - are moderately deep to a lithic contact
Reinecker (CO) - depths to secondary carbonates range from 56 to 74 cm
Tepecreek (MT) - are moderately deep to a paralithic contact
GEOGRAPHIC SETTING:
Landform - hillslopes, mountain slopes, eroded fan remnants, landslides
Elevation - 2,315 to 2,560 meters
Slope - 4 to 25 percent
Parent material - slope alluvium, colluvium and mass movement deposits derived from metamorphic and sedimentary rocks
Climate - long, cold winters; cool, moist springs; short, cool summers
Mean annual precipitation - 375 to 475 mm with peak periods of precipitation occurring during the spring
Mean annual air temperature - 0.5 to 3.0 degrees C.
Frost-free period - 15 to 45 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained, Ksat in the control section typically ranges from 1.5-15.0 um/sec.
USE AND VEGETATION: Narrowridge soils are primarily used for rangeland. The potential native vegetation is western needlegrass, rhizomatous wheatgrass, bluebunch wheatgrass, and antelope bitterbrush.
DISTRIBUTION AND EXTENT: Narrowridge soils are of small extent in southwestern Wyoming. MLRAs 43B and 46.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Sublette County, Wyoming, 2014. The series name is derived from a local landmark.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 12 cm (A horizon)
Argillic horizon - 12 to 130 cm (Btk1, Btk2, Btk3, Btk4 horizon)
Calcic horizon - 54 to 130 cm (Btk3, Btk4 horizons)
Particle-size control section - 12 to 62 cm (Btk1, Btk2, part of Btk3 horizons)
Narrowridge soils have a cryic temperature regime and an ustic moisture regime.
National Cooperative Soil Survey
U.S.A.