|
3`Z SOIL SURVEY
<br />fine, granular; slightly hard, very friable, non-
<br />sticky; few coarse to fine roots; 20 percent gravel;
<br />slightly acid; clear, wavy boundary.
<br />ABB-14 to 20 inches, light yellowish-brown (lOYR 6/4)
<br />very gravelly sandy loam; yellowish brown (lOYR
<br />5/9) moist; lenses of yellow•ish•brown (lOYR 5/4)
<br />sandy clay loam; dark yellowish brown (lOYR
<br />4/4) moist; x•eak, medium, subangular blocky
<br />structure; slightly hard, very friable, nonsticky;
<br />few medium and fine roots; 00 percent cobbles,
<br />stones, and gravel; neutral; clear, navy boundary.
<br />B2t-20 to 90 inches, yellowish-brown (101'R 5/9) [o brown
<br />(7.51'R 5/4) extremely stony sandy loam and thin,
<br />discontinuous lamellae of sandy clay loam and clay
<br />loam; yellowish brown (lOYR 5/4) moist and brown
<br />(7.SYR 9/4) moist; aveak, medium, subangular
<br />blocky structure; slightly hard, very friable, slightly
<br />sticky; few fine and medium roots; thin, nearly
<br />continuous clay films on ped faces; 60 percent
<br />stones; neutral; diffuse, irregular boundary.
<br />C-40 to 60 inches, stones, cobbles, gravel, and sand.
<br />The A2 horizon ranges from grayish broavn to yellowish
<br />brown. Content of coarse fragments ranges from 15 to 40
<br />percent. Reaction is 6.1 to 7.3. The B2[ horizon ranges from
<br />yellowish brou~n to dark brown. Reaction is 6.1 to 7.3.
<br />Lamellae in the B2t horizon range from '/e inch to 1 inch
<br />in thickness and from heavy sandy loam to clay loam.
<br />Troutville gravelly sandy loam, 3 to 35 percent slopes
<br />(TrE).-This soil is on glacial deposits on mountains in
<br />the northern part of Chaffee County, nol•th of Clear
<br />Creek Resel•voir and west of the Arkansas River,
<br />and in all parts of Lake County. The areas generally
<br />have northerly exposures and generally are larger than
<br />160 acres in size. Included with this soil in mapping
<br />are small areas of Pierian soils and Rock outcrop.
<br />Surface runoff is medium to rapid, and the hazard
<br />of erosion is moderate. This soil is used for wildlife
<br />habitat, watershed, and recreation. (Capability unit
<br />VIe<1, nonirrigated; woodland suitability group 1)
<br />In the Chaffee-Lake Area, soils of the Turret series
<br />are mapped only in a complex with Tigiwon soils. A
<br />description of this complex is given under the heading
<br />"Tigiwon Series."
<br />Representative profile of Turret cobbly sandy loam,
<br />in all area of Tigiwon-Turret cobbly sandy looms, 3 to
<br />25 percent slopes, 150 feet east of Forest Service road
<br />alld 650 feet east and 1,750 feet south of the north+vest
<br />corner of sec. 25, T. 50 N., R. 7 E., Chaffee County:
<br />Al-0 to 7 inches, grayish-brown (lOYR 5/2) cobbly sandy
<br />loam; very dark grzyish brown (lOYR 3/2) moist;
<br />weak, thin, platy structure; slightly hard, friable,
<br />slightly sticky; common fine and medium roots;
<br />20 percent cobbles and gravel; neutral; gradual,
<br />smooth boundary.
<br />B2t-7 to 16 inches, brown (]OYR 5/3) cobbly sandy clay
<br />loam; dark brown (]OYR 4/3) moist; moderate,
<br />medium, subangular blocky structure; hard, very
<br />friable, sticky; common medium and fine roots;
<br />thin continuous clay films on vertical and horizontal
<br />faces of peds; 30 percent cobbles and gravel; neu-
<br />tral; gradual, wavy boundary.
<br />Bat-10 to 30 inches, light yellowish•brown (lOYR 0/4)
<br />cobbly sandy loam; dark yellowish brown (lOYR
<br />4/4) moist; weak, medium to fine, subangular blorky
<br />structure; slightly hard, friable; slightly sticky;
<br />feav medium and fine roots; few, thin, patchy clay
<br />films on faces of peds; 40 percent cobbles and
<br />gravel; neutral; gradual, wavy boundary.
<br />C-30 to 60 inches, very pale brown (lOYR 7/9) cobbly
<br />sand}• loam; dark yellowish brown (lOYR 4/4)
<br />moist; massive; slightly hard, friable, nonsticky;
<br />i0 percent stones, cobbles, and gravel; neutral.
<br />The A horizon ranges from dark brown to very dark
<br />grayish brown. Content of gravel and cobbles ranges from 20
<br />to 35 percent. Reaction is F.0 to 7.3. The B2t horizon ranges
<br />from dark brown to dark yellowish brawn and from gravelly
<br />or cobbly sandy loam [o gravelly or cobbly sandy clay loom.
<br />Reaction is G.6 to 7.3.
<br />Turret Series
<br />The Turret series consists of deep, well-drained soils
<br />on alluvia] fans and valley side slopes. These soils
<br />formed in cobbly, moderately coarse textured alluvium.
<br />Slopes range fl•on] 3 to 25 percent. Elevation 1•anges
<br />from 7,500 to 9,000 feet. The plant cover is mid
<br />grasses and an overstory of pinyon pine and juniper.
<br />The average annual precipitation is 11 to 15 inches.
<br />The average annual soil temperature is 46° F., and
<br />the average soil temperaturre in summer is 64°. The
<br />frost-free season is GO to 85 days.
<br />In a represen±ative profile the surface layer is very
<br />dark grayish-brown cobbly sandy loam about 7 inches
<br />thick. The subsoil is dark-brown cobbly san(ly clay loam
<br />and dark yellowish-brown cobbly sandy loam about 23
<br />inches thick. The stlbstl•atum, extending to a depth of
<br />GO inches, is dark yellowish-brown sandy loam that is
<br />more than 70 percent stones, cobbles, and gravel. The
<br />profile is neutral throughout.
<br />Permeability in these soils is moderate, and the avail-
<br />able water capacity is low. Effective rooting depth is
<br />GO inches or more.
<br />I~rear]y all the acreage of Turret soils is in native
<br />grass and an overstory of pinyon pine and juniper.
<br />These soils are used for +vildlife habitat, recreatiml,
<br />watershed, and limited livestock gracing.
<br />R'ct Alluvial Land
<br />\Vet alluvial land IWa) is a nearly level to gently
<br />slo¢ing land type on first bottoms adjacent to the
<br />Arkansas River and its main tributaries, such as the
<br />South Fork of the Arkansas River, Cottomvood Creek,
<br />Chalk Creek, and B1•own's Creek. This land was formed
<br />by the meandering of rivers and streams.
<br />This land consists of gravel and sand bars and of
<br />.vet, stratified, nleclium-textured to coarse-textured
<br />soil materials. The kind of material and the way It was
<br />deposited nary considerably within short distances.
<br />These areas are subject to overflow from the Arkansas
<br />River and its tributaries, alld they have a flucttlatillg
<br />++•ater table between the surface and a depth of 2 feet.
<br />The plant cover in Chaffee County is mainly cotton-
<br />woods, willo+vs, and an understory of grass (fig. 14).
<br />1Vet alluvial land in Lake County is along the
<br />Arkansas River. It is similar to that in Chaffee County,
<br />but +villo+vs grow in thick stands and there are no
<br />cottonwood trees because of the cold climate. Slopes
<br />range from 0 to 5 percent.
<br />Included +vith this unit in mapping are small are,ls
<br />of Marsh.
<br />\Vet alluvial land is not suitable as range but can be
<br />grazed to a limited extent. It provides good cover for
<br />wildlife. (Capability unit VIIw-1, nonirrigated)
<br />
|