LOCATION BENDEMEERE COEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, micaceous Lamellic Haplocryalfs
TYPICAL PEDON: Bendemeere very gravelly sandy loam, on a northerly facing slope, convex, 24 percent slopes in a lodgepole pine-subalpine fir forest at an elevation of 8360 feet. (Colors are dry unless noted otherwise). When pedon was described soil pedon was moist to 47 inches, June 1990.
Oi--0 to 1 inches; slightly decomposed needles, twigs and bark
A--1 to 3 inches; brown (10YR 5/3) very gravelly sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure, soft, very friable; few coarse, common medium and fine and many very fine roots; few visible mica flakes as fine and very fine sand sized particles 32 percent gravel, 7 percent cobble, and 7 percent stone; slightly acid; clear wavy boundary.
E--3 to 10 inches; very pale brown (10YR 7/3), gravelly coarse sandy loam, brown (10YR 5/3) moist; weak medium subangular blocks parting to weak fine subangular blocky structure; soft, very friable; nonsticky and nonplastic; few coarse, common medium, and many fine and very fine roots; common visible mica flakes as fine and very fine sand sized particles; 25 percent gravel, 5 percent cobble; moderately acid; clear wavy boundary.
E and Bt1--10 to 21 inches; 65 percent of the matrix is very pale brown (10YR 7/3) and 35 percent of the matrix is light brown (7.5YR 6/4) very cobbly coarse sandy loam, 65 percent of the matrix is brown (10YR 5/3) and 35 percent of the matrix is brown (7.5YR 5/4) moist; weak medium and fine subangular blocky structure; soft, very friable; nonsticky and nonplastic; 1 - 1.5cm thick sandy clay loam discontinuous lamellae, reddish brown (5YR5/4); common very fine and fine and few coarse, medium roots; common visible mica flakes as fine and very fine sand sized particles; 25 percent gravel, 15 percent cobble and 2 percent stone; moderately acid; clear wavy boundary.
E and Bt2--21 to 30 inches; 75 percent of the matrix is light brown (7.5YR 6/4) and 25 percent pink (7.5YR 7/4) very gravelly loamy coarse sand, dark grayish brown (10YR 4/2)crushed moist; structureless; loose; nonsticky and nonplastic; 1 -1.5cm thick, sandy clay loam, continuous lamellae, reddish brown (5YR5/4) moist color and 1 - 0.5cm thick sandy clay loam discontinuous lamellae, reddish brown (5YR5/4); few coarse, common medium and fine and few very fine roots; common visible mica flakes as fine and very fine sand sized particles; 25 percent gravel, 10 percent cobbles and 2 percent stone; moderately acid; gradual wavy boundary.
Bt and E1--30 to 42 inches; pink (7.5YR 7/3) matrix is gravelly loamy sand, brown (7.5YR 4/4) moist; structureless; loose; non-sticky and non-plastic; 50 percent of this horizon is composed of thick and thin continuous, sandy clay loam lamellae, brown (7.5YR 5/4); many fine and very fine, and few medium roots; common visible mica flakes as fine and very fine sand sized particles; 20 percent gravel, 8 percent cobbles and 5 percent stones; moderately acid; clear wavy boundary.
Bt and E2--42 to 50 inches; pale brown (10YR 6/3) gravelly loamy sand, dark grayish brown (10YR 4/2) crushed moist; moderate medium subangular blocky structure; soft, friable; nonsticky and nonplastic; 4 - 1 to 3 cm thick discontinuous lamellae, sandy clay loam texture, color is brown (7.5YR 5/4); common fine and very fine, and few medium roots; common visible mica flakes as fine and very fine sand sized particles; 20 percent gravel; moderately acid; clear wavy boundary.
BC--50 to 62 inches; pale brown (10YR 6/3) very gravelly coarse sandy loam, brown (10YR 4/3) moist; weak medium subangular blocky structure; hard, friable; nonsticky and nonplastic; common fine and few very fine roots; common visible mica flakes as fine and very fine sand sized particles; 35 percent gravel, 10 percent cobbles, and 3 percent stone; 25 to 35 percent of this horizon is weathering gneiss or schist; strongly acid.
TYPE LOCATION: Clear Creek County, Colorado, Georgetown Soil Survey Area: about 5 miles west of Bergen Park, CO, about 1900 feet north and 2100 feet east of the southwest corner of section 23, T. 4S., R. 72 W. Latitude 39 degrees, 41 minutes 7.2 seconds N, longitude 105 degrees, 24 minutes 43.41 seconds W.
RANGE IN CHARACTERISTICS:
Soil moisture regime: Ustic, dry in parts of moisture control section for 55 to 65 cumulative days.
Mean annual soil temperature: 35 to 41 degrees F.
Mean annual summer soil temperature: 39 to 46 degrees F.
Depth to E horizon(s): 0 to 5 inches
Depth to paralithic contact: Greater than 60 inches
Depth to lamellae: 10 to 43 inches
Thickness of lamellae within upper 80 inches (2 m.): Total of all counted lamellae, 6 to 15 inches.
O horizon(s) may be 1 to 5 inches thick.
Particle-size control section (weighted average)
Clay content: 3 to 18 percent
Sand content: 60 to 90 percent
Rock fragments: 35 to 80 percent, gravel, cobbles and stones
Mineralogy: greater than 20 percent mica
Base Saturation: 30 to 59 percent
A horizon:
Hue: 10YR
Value: 3 through 6 dry, 2 through 4 moist
Chroma: 1 to 4
Reaction: moderately acid to slightly acid
E horizon(s):
Hue: 10YR or 7.5YR
Value: 6 or 7 dry, 4 through 6 moist
Chroma: 1 through 3
Texture: coarse sandy loam or loamy sand modified by rock fragments
Clay content: 3 to 10 percent
Reaction: moderately acid or strongly acid
E and Bt or Bt and E horizon(s):
Hue 10YR through 5YR
Value: 5 through 7 dry, 4 through 6 moist
Chroma: 1 through 4
Texture: loamy sand, loamy coarse sand, coarse sandy loam, sandy loam, and fine sand loam
Matrix clay content: 3 to 10 percent
Lamellae may occur, consisting of thin continuous and discontinuous lenses of sandy loamy or sandy clay loam material, clay percentage ranging from 12 to 25 percent.
Rock Fragments: 35 to 80 percent
COMPETING SERIES: The Siebert series has a base saturation greater than 60 percent.
GEOGRAPHIC SETTING:
Parent material: Colluvium and slope alluvium derived from granite, micaceous schist and gneiss
Landform: Mountain slopes, footslopes and toeslopes
Slopes: 15 to 70 percent slopes
Elevation: 7,200 to 10,800 feet
Mean annual temperature: 35 to 41 degrees F.
Mean annual precipitation: 17 to 23 inches
Precipitation pattern:
Wettest months: March, April, May and June
Driest months: September and October
Frost-free period: 30 to 55 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Legault, Leighcan, Nanita and Ohman series. The Legault soils are shallow to paralithic rock. Nanita soils are very deep with lamellae making up less than 6 inches in the subsoil . Ohman soils are moderately deep to paralithic rocks and have lamellae totaling less than 6 inches in thickness.
DRAINAGE AND PERMEABILITY: Well drained to somewhat excessively drained, rapid runoff and moderately rapid permeability.
USE AND VEGETATION: Recreation, watershed and wildlife habitat. Primary vegetation is lodgepole pine, subalpine fir, Englemann's spruce and some Douglas-fir with an understory of kinnikinnick, spike trisetum, elk sedge, grouse whortleberry and common juniper.
DISTRIBUTION AND EXTENT: Central and north central mountains, Colorado; LRR E, MLRA 48A; moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Clear Creek County, CO, Georgetown soil survey area, 2000.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone is from 10 to 40 inches.
Other features: Mica 30 to 48 by grain count.
Lamellae total thickness is greater than 6 inches(15 cm.) within upper 80 inches.
The assignment of the paramicaceous and is determined from laboratory data of this pedon S90CO019-002
Name of series derived from small community along Bear Creek in Clear Creek County, Colorado.
Taxonomic Version: Eighth Edition, 1998
The mineralogy class was changed from paramicaceous to micaceous in 07/2010 by the National Soil Survey Center on request of the responsible MLRA regional office. The change was necessary based on the eleventh edition of the Keys to Soil Taxonomy, 2010.