LOCATION FLEMINGCREEK IDEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, frigid Lamellic Haploxeralfs
TYPICAL PEDON: Flemingcreek silt loam, woodland; on a southwest-facing slope of 46 percent at 2,050 feet elevation. When described on May 18, 1999, the soil was moist throughout. (Colors are for dry soil unless otherwise stated.)
Oi--0 to 1.5 inches; needles, twigs, bark, cones, leaves (0.5 to 1.5 inches thick)
Oe--1.5 to 2 inches; decomposed organic matter (0.5 to 1.5 inches thick)
A--2 to 3 inches; gray (10YR 6/1) silt loam, dark gray (10YR 4/1) moist; weak very fine and fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine, fine and few medium roots; many very fine and fine tubular pores; neutral (pH 7.0); abrupt wavy boundary. (1 to 2 inches thick)
BA--3 to 11 inches; light gray (2.5Y 7/2) silt loam, grayish brown (2.5Y 5/2) moist; weak medium and thick platy structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine, fine and few medium roots; many very fine and fine tubular pores; neutral (pH 7.0); clear wavy boundary. (6 to 10 inches thick)
Bt1--11 to 18 inches; pale yellow (2.5Y 7/3) silty clay loam, light olive brown (2.5Y 5/3) moist; weak medium and thick platy structure; hard, firm, moderately sticky and moderately plastic; common very fine, fine and few medium roots; common very fine and fine tubular pores; few faint clay films on faces of peds and lining pores; many light yellowish brown (2.5Y 6/3) lamellae, 1/2 to 1 inch thick; slightly acid (pH 6.5); gradual wavy boundary. (6 to 14 inches thick)
Bt2--18 to 32 inches; pale yellow (5Y 7/3) silty clay loam, olive (5Y 5/3) moist; weak medium and thick platy structure; hard, firm, moderately sticky and moderately plastic; common very fine and fine roots; common very fine and fine tubular pores; few faint light yellowish brown (10YR 6/4) clay films on faces of peds and lining pores; many pale olive (5Y 6/3) lamellae, 1/2 to 1 inch thick; neutral (pH 6.7); clear wavy boundary. (7 to 18 inches thick)
Bk1--32 to 48 inches; light gray (5Y 7/2) silt loam, olive gray (5Y 5/2) moist; weak medium and thick platy structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine and fine roots; common very fine and fine tubular pores; violently effervescent (calcium carbonate); common fine and few medium lime seams and masses; moderately alkaline (pH 8.0); gradual wavy boundary. (11 to 20 inches thick)
Bk2--48 to 60 inches; light gray (5Y 7/2) silt loam, olive gray (5Y 5/2) moist; weak thick and very thick platy structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine and fine roots; common very fine and fine tubular pores; violently effervescent (calcium carbonate); common fine and few medium lime seams and masses; moderately alkaline (pH 8.0).
TYPE LOCATION: Boundary County, Idaho; about 5.5 miles northwest of Bonners Ferry; about 1,300 feet south and 2,550 feet west of the northeast corner of sec. 28, T. 63 N., R. 1 E.
Latitude - 48 degrees, 47 minutes, 9 seconds North
Longitude - 116 degrees, 20 minutes, 24 seconds West
USGS Ritz Quadrangle
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 45 to 47 degrees F.
Average summer soil temperature - 55 to 59 degrees F. with an O horizon
Moisture control section - dry 45 to 60 days (August to September), moist October through July
Depth to secondary calcium carbonate - 24 to 44 inches
A horizon
Value - 4 to 6 dry, 2 to 4 moist
Chroma - 1 or 2 dry or moist
Clay content - 15 to 22 percent
Reaction - slightly acid or neutral
BA horizon
Hue - 2.5Y or 10YR
Value - 6 or 7 dry, 4 or 5 moist
Chroma - 2 or 3 dry or moist
Clay content - 15 to 22 percent
Reaction - slightly acid or neutral
Bt horizons
Hue - 2.5Y or 5Y
Value - 6 or 7 dry, 4 or 5 moist
Chroma - 2 or 3 dry or moist
Texture - SICL, SIL
Clay content - 25 to 34 percent
Lamellae - common to many, 1/2 to 2 inches thick, 2.5Y, 5Y, and 10YR 6/3 and 5/3 dry
Reaction - slightly acid to slightly alkaline
Btk horizon (present in some pedons)
Texture - SICL, SIL
Clay content - 25 to 34 percent
Lamellae - 1/16 to 1/4 inch thick
Effervescence - strongly to violently effervescent (calcium carbonate)
Calcium Carbonate - lime in seams and soft masses
Bk horizons
Hue - 5Y or 2.5Y
Clay content - 20 to 26 percent
Effervescence - strongly to violently effervescent (calcium carbonate)
Calcium carbonate - few to many, fine to coarse, lime in seams and soft masses
Calcium carbonate equivalent - 5 to 15 percent
C horizon (present in some pedons)
Texture- SICL, SIL
Clay content - 20 to 30 percent
Effervescence - slightly to strongly effervescent (calcium carbonate)
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Flemingcreek soils are on mainly southeast and west facing terrace escarpments. Slopes range from 35 to 65 percent. These soils formed in glaciolacustrine sediments. Elevation ranges from 1,800 to 2,400 feet. The average annual precipitation is 25 to 30 inches and average annual air temperature is 43 to 45 degrees F. The average frost-free period is 100 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Artnoc, Caboose, Crash, Porthill, and Wishbone soils. Artnoc soils are on east-facing terrace escarpments and have Bt horizons with less than 18 percent clay. Crash soils are on north facing terrace escarpments and have Bt horizons with less than 18 percent clay. Caboose soils are on southwest and southeast-facing terrace escarpments and have Bt horizons with less than 18 percent clay. Porthill soils are on terraces and have Bt horizons with greater than 35 percent clay. Wishbone soils are on south facing terrace escarpments and have a mesic temperature regime and Bt horizons with less than 18 percent clay.
DRAINAGE AND PERMEABILITY: Well drained; rapid to very rapid runoff; moderately slow permeability.
USE AND VEGETATION: Woodland, wildlife habitat, recreation, and watershed. Natural vegetation is mainly grand fir, Douglas-fir, western larch, ponderosa pine, and lodgepole pine, with an understory of longtube twinflower, baldhip rose, white spirea, pine reedgrass, heartleaf arnica, sweetscented bedstraw, starry false Solomons seal, creambush oceanspray, and mallow ninebark.
DISTRIBUTION AND EXTENT: Northern Idaho, and possible northwestern Montana, and northeastern Washington. This series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Boundary County, Idaho, 2002.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the mineral surface to 11 inches (A and BA horizons)
Argillic horizon - the zone from 11 to 32 inches ( Bt1 and Bt2 horizons)
Particle-size control section - the zone from 11 to 31 inches (Bt1 and part of the Bt2 horizon)