LOCATION GIMLETT IDEstablished Series
The Gimlett series consists of very deep, well drained soils that
formed in alluvium from mixed sources. Gimlett soils are on stream
terraces and have slopes of 0 to 2 percent. Permeability is moderate
in the upper part and very rapid in the lower part. The average annual
precipitation is about 17 inches, and the average annual air
temperature is about 40 degrees F.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Pachic Ultic Haploxerolls
Haploxerolls.
TYPICAL PEDON: Gimlett very gravelly sandy loam on a 1 percent south
facing slope at an elevation of 5,880 feet in rangeland. When
described on June 27, 1984, the soil was moist below 3 inches. (Colors
are for air dry soil unless otherwise noted.)
A1--0 to 3 inches; very dark grayish brown (10YR 3/2) very gravelly
sandy loam, very dark brown (10YR 2/2) moist; weak very fine granular
structure; soft, very friable, slightly sticky and slightly plastic;
many very fine and fine, few medium and coarse roots; many very fine
and fine interstitial pores; about 45 percent pebbles; slightly acid
(pH 6.1); clear smooth boundary. (2 to 4 inches thick)
A2--3 to 9 inches; very dark grayish brown (10YR 3/2) very gravelly
loam, very dark brown (10YR 2/2) moist; weak very fine and fine
subangular blocky structure parting to moderate very fine and fine
granular; soft, very friable, slightly sticky and slightly plastic;
many very fine and fine, few medium and coarse roots; many very fine
and fine interstitial pores; about 50 percent pebbles; moderately acid
(pH 6.0); clear wavy boundary. (6 to 12 inches thick)
AB--9 to 18 inches; dark grayish brown (10YR 4/2) very gravelly
loam, very dark grayish brown (10YR 3/2) moist; weak very fine and fine
subangular block structure; slightly hard, friable, slightly sticky and
slightly plastic; common very fine and fine, few medium and coarse
roots; common very fine and fine interstitial pores and few very fine
and fine tubular pores; about 45 percent pebbles; moderately acid (pH
6.0); clear wavy boundary. (5 to 11 inches thick)
Bw1--18 to 27 inches; dark brown (10YR 4/3) very gravelly sandy
loam, very dark grayish brown (10YR 3/2) moist; moderate fine and
medium subangular blocky structure; slightly hard, friable, slightly
sticky and slightly plastic; common very fine, fine, medium, and coarse
roots; common very fine and fine interstitial pores and few very fine
and fine tubular pores; about 45 percent pebbles and 5 percent cobbles;
moderately acid (pH 5.8); gradual wavy boundary. (5 to 14 inches
thick)
2Bw2--27 to 33 inches; yellowish brown (10YR 5/4) extremely cobbly
sandy loam, dark yellowish brown (10YR 3/6) moist; weak fine subangular
blocky structure; soft, very friable, slightly sticky and slightly
plastic; common very fine and fine, few medium and coarse roots; common
very fine and fine interstitial pores; about 25 percent pebbles, 40
percent cobbles, and 5 percent stones; moderately acid (pH 5.8); clear
wavy boundary. (4 to 9 inches thick)
2Bw3--33 to 38 inches; yellowish brown (10YR 5/4) extremely cobbly
loamy coarse sand, dark yellowish brown (10YR 3/6) moist; weak fine
subangular blocky structure; soft, very friable; common very fine,
fine, and medium roots; common very fine and fine interstitial pores;
about 25 percent pebbles; 40 percent cobbles, and 5 percent stones;
moderately acid (pH 5.8); clear wavy boundary. (3 to 10 inches thick)
2B--38 to 49 inches; brown (10YR 5/3) extremely cobbly coarse sand,
dark yellowish brown (10YR 3/6) moist; single grain; loose; common very
fine, fine, and medium roots; many very fine and fine interstitial
pores; about 25 percent pebbles, 40 percent cobbles, and 10 percent
stones; moderately acid (pH 5.7); gradual wavy boundary. (9 to 14
inches thick)
2Bq--49 to 63 inches; brown (10YR 5/3) extremely cobbly coarse
sand, dark yellowish brown (10YR 3/4) moist; single grain; loose; few
very fine, fine, and medium roots; many very fine, fine, and medium
interstitial pores; white (10YR 8/2) silica coats on underneath sides
of coarse fragments; about 25 percent pebbles, 40 percent cobbles, and
10 percent stones; moderately acid (pH 6.0).
TYPE LOCATION: Blaine County, Idaho; about .75 miles north and .75
miles west of Ketchum; 2150 feet east and 950 feet north of the
southwest corner of sec. 12, T. 4 N., R. 17 E.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 40 to 44 degrees F.
Thickness to mollic epipedon - 20 to 27 inches
Depth of cobbles and stones - 22 to 40 inches
Reaction - moderately acid to neutral
A1 horizons
Value of 3 through 5 dry and 2 or 3 moist
Chroma- 2 or 3 dry or moist
A2 and AB horizons
Value of 3 through 5 dry and 2 or 3 moist
Chroma- 2 or 3 dry or moist
Texture - GRV-SL, GRV-L, or GRV-SCL
Clay content - 14 to 19 percent
Coarse fragments - 35 to 60 percent
Bw, 2Bw, and 2B horizons
Value of 5 or 6 dry, 3 or 4 moist
Chroma- 4 through 6 dry or moist
Texture - CBX-SL, CBX-LS, or CBX-LCOS
Clay content - 8 to 15 percent
Rock fragments - 60 to 85 percent
2Bq horizon
Value of 5 to 6 dry, 3 or 4 moist
Chroma- 3 through 6 dry or moist
Texture - CBX-LCOS and CBX-COS
Clay content - 0 to 8 percent
Rock fragments - 60 to 85 percent
Some pedons may have weak accumulations (less than 2 percent calcium
carbonate) on underneath sides of fragments - matrix is noneffervescent
and coatings are slightly effervescent.
COMPETING SERIES: These are the Buckcreek, Doodlelink(T), Lamondi,
and Piersonte soils. Buckcreek soils are 20 to 40 inches deep over
bedrock. Doodlelink and Lamondi soils contain 20 to 30 percent clay
and lack sandy skeletal layers in the control section. Piersonte soils
have 18 to 30 percent clay in the control section and have angular rock
fragments in the control section. Piersonte soils lack sandy skeletal
layers above 40 inches. Piersonte soils lack sandy-skeletal layers
above 40 inches.
GEOGRAPHIC SETTING: Gimlett soils occur on stream terraces and have
slopes of 0 to 2 percent. Elevation ranges from 5,300 to 6,000 feet.
The soil formed in alluvium derived from mixed sources. The annual
precipitation ranges from 16 to 18 inches, most of which falls as snow
and early spring rain. The annual air temperature ranges from 39 to 42
degrees F. The frost-free season ranges from 60 to 75 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Adamson, Balaam, Drage,
and Isknat. Adamson soils have coarse loamy over sandy or sandy
skeletal particle size control sections and occur on lower stream
terraces. Balaam soils have sandy skeletal control sections and occur
on lower stream terraces. Drage soils have argillic horizons and
accumulations of secondary calcium carbonate in the subsoil and occur
on fan terraces. Isknat soils are clayey skeletal and occur on the
same landscape.
DRAINAGE AND PERMEABILITY: Well drained, slow runoff; moderate
permeability in the upper part and very rapid in the lower horizons.
USE AND VEGETATION: Mainly used for homesites. Vegetation is mountain
big sagebrush and Idaho fescue.
DISTRIBUTION AND EXTENT: Gimlett soils are inextensive in south
central Idaho.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Blaine County, Idaho, 1985.
REMARKS: Features diagnostic to this series are - mollic epipedon -
the zone from the surface of the soil to approximately 27 inches. (A1,
A2, AB, and Bw1 horizons)
National Cooperative Soil Survey