LOCATION CREST NMEstablished Series
TAXONOMIC CLASS: Clayey-skeletal, mixed, active, frigid Typic Haplustalfs
TYPICAL PEDON: Crest stony silt loam.
0i--0 to 1 inches; decomposed organic material mainly leaves, twigs, bark and needles.
0e--1 to 4 inches; decomposed and partially decomposed organic mat made up of the remnants of needles, twigs and bark. Combined thickness of the Oi and Oe horizon (1 to 4 inches thick)
A--4 to 6 inches; very dark gray (10YR 3/1) stony silt loam, black (10YR 2/1) moist; moderate fine crumb structure; soft, very friable; about 20 percent of this horizon is stone; neutral (pH 7.2); abrupt boundary. 0 to 2 inches thick.
E--6 to 10 inches; light brownish gray (10YR 6/2) stony silt loam, dark grayish brown (10YR 4/2) moist; moderate fine crumb structure; soft, very friable; about 20 percent of his horizon is stone; neutral (pH 7.2); clear boundary. 4 to 6 inches thick.
B&E--10 to 14 inches; of the material less than 2 mm., about 25 percent is like the E horizon and is the matrix. About 75 percent is Bt material and characterized as follows: brown (7.5YR 5/3) clay loam, brown (7.5YR 4/3) moist; moderate fine subangular blocky structure; very hard, firm. About 25 to 40 percent of the horizon is stone; neutral (pH 7.2); gradual boundary. 4 to 15 inches thick.
Bt--14 to 28 inches; reddish brown (5YR 5/4) very stony clay, reddish brown (5YR 4/4) moist; moderate medium subangular blocky structure; extremely hard, firm; about 55 percent of the horizon is stone; there are thin continuous clay films on peds and coating the stone fragments; slightly alkaline (pH 7.4); clear boundary. 12 to 37 inches thick.
R--28 to 30 inches; limestone bedrock weakly fractured with streamers of Bt horizon extending into the rock.
TYPE LOCATION: Torrance County, New Mexico; NE1/4 NE1/4 of Sec. 27, T7N, R5E.
RANGE IN CHARACTERISTICS:
Soil moisture: Typic ustic moisture regime
A&E horizon
Hue: 10YR to 7.5YR
Chroma: 2 to 3
Value: 5 to 7 dry; 4 to 5 moist
B/E horizon
Hue: 2.5YR to 5YR
Chroma: 2 to 4
Value: 5 to 6 dry; 4 to 5 moist
Bt horizon
Texture: typically clay
Clay content: 38 to 50 percent
Rock fragments: 30 to 70 percent
Reaction: neutral to slightly alkaline
Depth to bedrock: 20 to 60 inches
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Normal to excessive relief. Moderately sloping to very steep mountain slopes.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Pino, Supervisor and Wilcoxson soils.
DRAINAGE AND PERMEABILITY: Well drained; runoff is medium; slowly permeable.
USE AND VEGETATION: These soils are used for forestry, rangeland, and recreation. Ponderosa pine, some spruce and fir with an understory of oak brush.
DISTRIBUTION AND EXTENT: Present known distribution limited to the mountainous areas in central New Mexico. MLRA 39.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Torrance County, New Mexico, 1965.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 4 to 6 inches (A horizon)
Albic horizon - The zone from 6 to 10 inches (E horizon)
Argillic horizon - The zone from 14 to 28 inches (Bt horizon)
Lithic contact - at 28 inches (R horizon)
Classified according to Keys to Soil Taxonomy Tenth Edition, 2006
Name was taken from a well established and marked hiking trail through the Monzano Mountains.