LOCATION GOATHAUNT MT
Tentative Series
Rev. PHO-JMS-RJS
05/2017
GOATHAUNT SERIES
The Goathaunt series consists of very deep, well drained soils that formed in volcanic ash over till and colluvium derived from mixed metasedimentary material. These soils are on glacial-valley floors and glacial-valley walls. Slopes are 8 to 65 percent. Mean annual precipitation is about 1,475 mm, and mean annual air temperature is about 2.0 degrees C.
TAXONOMIC CLASS: Ashy-skeletal, amorphic Typic Haplocryands
TYPICAL PEDON: Goathaunt stony ashy loam, in coniferous forest. This pedon was described on a 40 percent slope at 1,495 meters elevation. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 5 cm; slightly decomposed needles forest litter.
A--5 to 23 cm; gray (10YR 6/1) stony ashy loam, dark gray (10YR 4/1) moist; weak fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine, common fine and medium, and few coarse roots; many very fine and fine tubular pores; 20 percent channers, 5 percent cobbles, 5 percent stones and 2 percent boulders; moderately acid (pH 5.8); clear smooth boundary.
Bw1--23 to 60 cm; light brownish gray (10YR 6/2) very channery ashy loam, dark grayish brown (10YR 4/2) moist; weak fine subangular structure; slightly hard, friable, slightly sticky, slightly plastic; common very fine, fine and medium and few coarse roots; common very fine and fine tubular pores; 30 percent channers and 5 percent stones; moderately acid (pH 6.0); clear wavy boundary.
Bw2--60 to 116 cm; pale brown (10YR 6/3) very channery ashy loam, brown (10YR 4/3) moist; moderate fine subangular structure; slightly hard, friable; slightly plastic and slightly plastic; few fine and few medium roots; common fine tubular pores; 45 percent channers; moderately acid (pH 6.0); clear wavy boundary.
2C--116 to 152 cm; light gray (10YR 7/2) extremely channery sandy loam, light yellowish brown (10YR 6/4) moist; massive; soft, very friable, slightly sticky and slightly plastic; common fine tubular pores; 50 percent channers, 15 percent cobbles and 5 percent stones; slightly acid (pH 6.2).
TYPE LOCATION: Glacier County, Montana; located about 710 meters south and 452 meters east from the northwest corner of sec. 13, T. 35N., R. 16W; Many Glacier topographic quadrangle; Latitude - 48 degrees, 47 minutes, 29 seconds north; Longitude - 113 degrees, 38 minutes, 45 seconds west.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 2.5 to 6.5 degrees C.
Volcanic ash thickness - 100 to 150 cm
Depth to top of cambic - 12 to 30 cm
Oi horizon
Thickness: 2 to 8 cm
A horizon
Hue: 10YR or 7.5YR dry or moist
Value: 4 to 6 dry; 3 to 5 moist
Chroma: 1 to 4 dry or moist
Texture, less than 2mm fraction: ashy silt loam or ashy loam
Clay content: 8 to 20 percent
Rock fragments: 15 to 50 percent--15 to 45 percent gravel or channers; 5 to 20 percent cobbles or flagstones; 0 to 15 percent stones; 0 to 5 percent boulders
Reaction: pH 5.2 to 6.2
Thickness: 10 to 25 cm
Bw1, Bw2 horizons
Hue: 10YR or 7.5YR dry or moist
Value: 5 to 7 dry; 4 to 6 moist
Chroma: 1 to 4 dry or moist
Texture, less than 2mm fraction: ashy silt loam or ashy loam
Clay content: 10 to 20 percent
Rock fragments: 35 to 75 percent--20 to 45 percent gravel or channers; 0 to 30 percent cobbles or flagstones; 0 to 10 percent stones
Reaction: pH 5.4 to 6.5
Thickness: 75 to 120 cm (combined thickness of Bw1, Bw2)
2C horizon
Hue: 10YR or 7.5YR dry or moist
Value: 5 to 7 dry; 4 to 6 moist
Chroma: 2 to 6 dry or moist
Texture, less than 2mm fraction: loam or sandy loam
Clay content: 10 to 20 percent
Rock fragments: 35 to 75 percent--30 to 50 percent gravel or channers; 0 to 30 percent cobbles or flagstones; 0 to 15 percent stones
Reaction: pH 5.8 to 7.0
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landform - glacial-valley floors and glacial-valley walls
Elevation - 1,000 to 2,400 meters
Slope - 8 to 65 percent
Parent material - volcanic ash over till and colluvium derived from mixed metasedimentary material
Climate - long, cold winters; moist springs; short warm summers
Mean annual precipitation - 825 to 2,250 mm.
Mean annual air temperature - 2.0 to 6.0 degrees C.
Frost-free period - 40 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: None listed
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; 5 to 50 um/sec.
USE AND VEGETATION: Goathaunt soils are used mainly for recreation, woodland and wildlife habitat. Vegetation is dominated by subalpine fir, Engelmann spruce with an understory of fool's huckleberry, big huckleberry, grouse whortleberry, beargrass, sitka alder, mountain boxwood and arrowleaf groundsel.
DISTRIBUTION AND EXTENT: Goathaunt soils are of small extent in northwestern Montana. MLRA 43A and 43B.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana.
SERIES PROPOSED: Glacier National Park area in Glacier County, Montana, 2015. The series name is derived from a local landmark.
REMARKS: Diagnostic horizons and feature recognized in this pedon are:
Ochric epipedon - from 0 to 23 cm (Oi, A horizons)
Volcanic ash layer - from 5 to 116 cm (A, Bw1, Bw2 horizons)
Cambic horizon - from 23 to 116 cm (Bw1, Bw2 horizons)
Particle-size control section - from 5 to 105 cm (A, Bw1, part of the Bw2 horizons)
Goathaunt soils have a cryic temperature regime and an udic moisture regime.
Taxonomic version: Twelfth Edition, 2014
National Cooperative Soil Survey
U.S.A.