LOCATION NEWLANCREEK             MT

Tentative Series
Ird. EMM/RJS
05/2014

NEWLANCREEK SERIES

The Newlancreek series consists of shallow, well drained soils that formed in colluvium or residuum from sedimentary rock. These soils are on escarpments and hills. Slopes are 2 to 35 percent. Mean annual precipitation is about 450 millimeters and mean annual air temperature is about 4.4 degrees C.

TAXONOMIC CLASS: Loamy, mixed, superactive, frigid Lithic Haplustolls

TYPICAL PEDON: Newlancreek loam, 4 percent slope in rangeland (colors are for dry soil unless otherwise noted).

A--0 to 15 centimeters; brown (7.5YR 4/2) loam, dark brown (7.5YR 3/2) moist; weak very fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine roots; 5 percent channers; slightly alkaline (pH 7.6); clear smooth boundary. (10 to 15 cm thick)

Bw--15 to 32 centimeters; brown (7.5YR 5/3) channery loam, dark brown (7.5YR 3/3) moist; moderate very fine subangular blocky structure; soft, very friable, slightly sticky and nonplastic; few very fine and medium roots; 15 percent channers; slightly alkaline (pH 7.8); abrupt smooth boundary. (8 to 25 cm thick)

Bk--32 to 46 centimeters; reddish brown (5YR 5/3) channery loam, reddish brown (5YR 4/3) moist; moderate very fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; few very fine and medium roots; 30 percent channers; few, fine threads of calcium carbonate masses; slightly alkaline (pH 7.8); abrupt smooth boundary. (8 to 20 cm thick)

R--46 centimeters; hard, strongly cemented red mudstone bedrock.

TYPE LOCATION: Meagher County, Montana; White Sulphur Springs topographic quadrangle. UTM 12T, 0509294e, 5162859n. NAD27.

RANGE IN CHARACTERISTICS:

Soil temperature - 5 to 7 degrees C.
Mollic epipedon thickness - 18 to 35 centimeters.
Depth to bedrock - 25 to 50 centimeters.

A horizon
Hue - 5YR or 7.5 YR
Value - 4 or 5 dry, 2.5 or 3 moist
Chroma - 2 or 3, dry or moist
Texture - loam or sandy loam
Clay content - 16 to 24 percent
Rock fragments - total 5 to 25 percent-5 to 25 percent gravel or channers, 0 to 5 percent cobbles or flagstones
Reaction - pH 7.0 to 7.8

Bw horizon
Hue - 5YR or 7.5YR
Value - 4 or 5 dry, 2.5 to 4 moist
Chroma - 3 or 4, dry or moist
Texture - loam or sandy loam
Clay content - 18 to 25 percent
Rock fragments - 5 to 30 percent total--5 to 30 percent gravel or channers, 0 to 5 percent cobbles or flagstones
Reaction - pH 7.0 to 8.0

Bk horizon
Hue - 2.5YR or 5YR
Value - 5 or 6 dry, 3 or 4 moist
Chroma - 3 or 4, dry or moist
Texture - loam or sandy loam
Clay content - 18 to 25 percent
Calcium carbonate equivalent - 5 to 15 percent
Rock fragments - 5 to 40 percent total--5 to 35 percent gravel or channers, 0 to 5 percent cobbles or flagstones
Reaction - pH 7.0 to 8.3

COMPETING SERIES:
Akhoni (NM) - does not have a Bk horizon
Ansari (CO) - has timing of precipitation that is evenly distributed throughout the year
Corpening (WY) - has hues of 10YR or 7.5YR in the Bk horizon
Falcon (CO) - do not have a Bk horizon
Falconry - do not have a Bk horizon

GEOGRAPHIC SETTING:
Landform - escarpments and hills.
Elevation - 1500 to 1900 meters.
Slope - 2 to 35 percent.
Parent material - colluvium or residuum derived from sedimentary bedrock, including the Spokane Shale formation.
Climate - long, cold winters; moist springs; short, warm summers.
Mean annual precipitation - 380 to 480 millimeters, most of which falls during spring and early summer.
Mean annual air temperature - 4 to 7 degrees C.
Frost-free period - 70 to 90 days.

GEOGRAPHICALLY ASSOCIATED SOILS: None listed.

DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.

USE AND VEGETATION: Newlancreek soils are used mainly for rangeland. The potential native vegetation is mainly bluebunch wheatgrass, Idaho fescue, needleandthread, western wheatgrass, forbs, and shrubs.

DISTRIBUTION AND EXTENT: Newlancreek soils are of small extent in west-central Montana. MLRAs 43B, and 44B.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES PROPOSED: Meagher County, Montana, 2014. The Newlancreek soil is named for a nearby creek.

REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - from the surface to 32 centimeters (A and Bw horizons)
Particle-size control section - from 25 to 46 centimeters (part of the Bw and the Bk horizons)
Lithic contact - at a depth of 46 centimeters (R horizon)

Newlancreek soils have a frigid soil temperature regime and an ustic soil moisture regime.

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National Cooperative Soil Survey
U.S.A.