LOCATION STANLEY NMTentative Series
TAXONOMIC CLASS: Very-fine, mixed, semiactive, mesic Aridic Haplusterts
TYPICAL PEDON: Stanley clay--on a playa floor sloping less than 1 percent at 6,854 feet elevation. (Colors are for dry soil unless otherwise noted. When described on May 28, 2002, the soil was dry from 0 to 23 inches, slightly moist from 23 to 37 inches, and moist from 37 to 100 inches.)
A--0 to 3 inches; light yellowish brown (2.5Y 6/3) clay, light olive brown (2.5Y 5/3) moist; weak thin platy structure parting to moderate very fine granular; soft, very friable, very sticky and very plastic; few fine and few very fine roots; common very fine irregularly shaped pores; strongly effervescent (20 percent calcium carbonate equivalent); moderately alkaline (pH 8.4); abrupt smooth boundary. (1 to 4 inches thick)
Bsszg1--3 to 17 inches; light olive brown (2.5Y 5/3) clay, olive brown (2.5Y 4/3) moist; weak very coarse angular blocky structure; extremely hard, very firm, very sticky and very plastic; few medium, few fine, and few very fine roots; few fine and few very fine tubular pores; common slickensides; common wedge shaped aggregates; few vertical 30 mm wide cracks, common vertical 3 to 5 mm wide cracks, and common horizontal 1 to 2 mm wide cracks; common medium distinct light gray (2.5Y 7/2) redoximorphic features; very few faint salt crystals in surface pores; strongly effervescent (20 percent calcium carbonate equivalent); moderately alkaline (pH 8.4); gradual wavy boundary.
Bsszg2--17 to 27 inches; olive gray (5Y 5/2) clay, olive gray (5Y 4/2) moist; weak very coarse angular blocky structure; extremely hard, very firm, very sticky and very plastic; few fine and few very fine roots; few fine and few very fine tubular pores; common slickensides; common wedge shaped aggregates; few vertical 30 mm wide cracks and common vertical 3 to 5 mm wide cracks; common, medium prominent brown (7.5YR 4/4) redoximorphic features; common distinct salt crystals in pores; strongly effervescent (23 percent calcium carbonate equivalent); strongly alkaline (pH 8.6); gradual wavy boundary.
Bsszg3--27 to 38 inches; olive gray (5Y 5/2) clay, olive gray (5Y 4/2) moist; weak very coarse angular blocky structure; extremely hard, very firm, very sticky and very plastic; few very fine roots; few very fine tubular pores; few slickensides; few wedge shaped aggregates; few vertical 30 mm wide cracks; common large and medium prominent strong brown (7.5YR 5/8) redoximorphic features; few very fine salt crystals in root channels (15 percent); strongly effervescent (15 percent calcium carbonate equivalent); moderately alkaline (pH 8.4); gradual wavy boundary.
Bsszg4--38 to 56 inches; gley pale green (7/2) clay, gley pale green (7/2) moist; weak very coarse angular blocky structure; extremely hard, very firm, very sticky and very plastic; few very fine roots; few very fine tubular pores; few slickensides; few wedge shaped aggregates; few vertical 30 mm wide cracks; common large prominent brown (7.5YR 4/4) and common medium prominent reddish yellow (7.5YR 6/8) redoximorphic features; very few fine gypsum cylinders, common coarse and very coarse salt crystals and clusters (19 percent); strongly effervescent (24 percent calcium carbonate equivalent); moderately alkaline (pH 8.4); clear wavy boundary. (Combined thickness of the Bsszg horizons is 45 to 55 inches)
Bssyzg--56 to 101 inches; strong brown (7.5YR 4/6) clay, strong brown (7.5YR 4/6) moist; weak very coarse angular blocky structure; extremely hard, very firm, very sticky and very plastic; very few slickensides; common wedge shaped aggregates; common medium prominent light olive gray (5Y 6/2) redoximorphic features; one percent gypsum; strongly effervescent (25 percent calcium carbonate equivalent); moderately alkaline (pH 8.2).
TYPE LOCATION: Santa Fe County, New Mexico, about 2 miles southeast of White Lakes; 749 feet west and 2,568 feet south of the northeast corner of Section 18, T11N, R11E; USGS White Lakes 7.5 minute topographic quadrangle; Latitude 35 degrees 10 minutes 45.1 seconds North and Longitude 105 degrees 48 minutes 20.1 seconds West, NAD 27.
RANGE IN CHARACTERISTICS:
Soil moisture - The soil moisture control section (SMCS) is intermittently moist in some part from July to October and December to March. Additional run-on occurs from July through September. The soils are driest in May and June. The soil moisture regime is ustic bordering on aridic.
Soil temperature - 51 to 53 degrees F.
Depth to base of ochric epipedon 1 to 4 inches
Particle-size control section weighted averages:
Silicate clay content: 60 to 70 percent clay
Sand content: 10 to 25 percent
Fine sand or coarser content: 5 to 15 percent
Rock fragment content: less than 1 percent gravel
Cracks: Mostly occur from 3 to 43 inches
Slickensides and pressure faces: Mostly occur from 3 to 56 inches deep.
Redoximorphic features: Occur from 3 to 101 inches in depth.
Salinity: dS/m - 4 to 8
Sodicity: SAR - 5 to 13
A horizon
Value: 3 to 5 dry, 2 or 3 moist
Chroma: 2 to 4 dry, 2 or 3 moist
Rock fragments: 0 to 2 percent gravel
Calcium carbonate equivalent: 15 to 25 percent
Bsszg horizons
Hue: 5Y, 2.5Y, 7.5YR, or gley
Value: 4 or 5 dry or 7 gley, 4 or 5 moist, or 2 gley
Chroma: 2, 3, or 6, dry or moist
Clay content: 60 to 70 percent
Calcium carbonate equivalent: 15 to 25 percent
Salinity, dS/m: 2 to 8
COMPETING SERIES: Currently, there are no competing series. A similar soil in a different family is the Moriartche series. Morartche soils are fine and have a superactive activity class.
GEOGRAPHIC SETTING: Stanley soils are on playa floors. They formed in lacustrine deposits derived from shale. Slopes are 0 to 1 percent. Elevation ranges from 6,000 to 7,200 feet. The mean annual precipitation is 12 to 14 inches with about 45 percent falling as rain from high-intensity convective thunderstorms between July and September. These soils receive an additional 2 to 5 inches of run-on moisture from flooding. The mean annual air temperature is 49 to 51 degrees F. The frost-free period is 130 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kwahe and Triane soils. Kwahe soils are fine and are on playa steps. Triane soils are fine, have a cambic horizon, and are on playa rims.
DRAINAGE AND PERMEABILITY: Poorly drained; runoff is negligible; permeability is very slow. These soils are rarely ponded for long to very long periods in some years. After being ponded for a few days, the soil saturates at the surface, forms a perched water table, and wets deeper over time under sustained inundation.
USE AND VEGETATION: Stanley soils are used for livestock grazing and ponds. Present vegetation consists of annual weeds.
DISTRIBUTION AND EXTENT: Stanley soils are of small extent in the northeastern part of the Estancia Basin in the Mexican Highland section of the Basin and Range physiographic province in northcentral New Mexico, MLRA 70C.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona.
SERIES PROPOSED: Santa Fe County, New Mexico; Santa Fe Area Soil Survey Update; 2002. The name Stanley is taken from the name of a town in Santa Fe county.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 inches to a depth of about 3 inches. (A horizon)
Redoximorphic features - 3 to 101 inches (Bss horizons).
Classified according to Keys to Soil Taxonomy Tenth Edition, 2006.
Note: This soil occurs in association with soils that have an ustic aridic soil moisture regime; however this soil receives additional moisture from surrounding areas due to landscape position.
ADDITIONAL DATA: The series type location has been sampled for full characterization by the Soil Survey Laboratory (SSL), Lincoln, NE, as soil survey sample number S-NM-02-049-09; Calcium carbonate equivalence was determined using a field calcimeter.