LOCATION TRIANE NMTentative Series
TAXONOMIC CLASS: Fine, mixed, active, mesic Ustertic Haplocambids
TYPICAL PEDON: Triane silty clay--on a playa dune/step sloping 1 to 2 percent to the west (270) at 6,790 feet elevation--rangeland. (Colors are for dry soil unless otherwise noted. When described on May 29, 2002, the profile was dry throughout.)
A1--0 to 2 inches; pale brown (10YR 6/3) silty clay loam, pale brown (10YR 6/3) moist; weak fine subangular blocky structure parting to weak fine granular; soft, very friable, moderately sticky and moderately plastic; common fine and common medium roots; common very fine and common fine irregularly shaped pores; violently effervescent (22 percent calcium carbonate equivalent); slightly alkaline (pH 7.8); clear smooth boundary. (1 to 3 inches thick)
A2--2 to 4 inches; pale brown (10YR 6/3) silty clay loam, pale brown (10YR 6/3) moist; weak thin and medium platy structure; slightly hard, very friable, moderately sticky and moderately plastic; common medium and common fine roots; common medium, common fine, and many very fine irregularly shaped pores; trans horizon cracks visible beginning at this horizon to a depth of about 25 inches with an occurrence of about 3 to 4 per meter at the surface; violently effervescent (25 percent calcium carbonate equivalent); slightly alkaline (pH 7.8); clear wavy boundary. (1 to 4 inches thick)
Btyz--4 to 14 inches; pale brown (10YR 6/3) clay, yellowish brown (10YR 5/4) moist; moderate coarse prismatic structure parting to strong coarse subangular blocky; very hard, very firm, moderately sticky and very plastic; few medium, few fine, and few very fine roots; few fine and few very fine tubular pores; few distinct clay films bridging sand grains and lining pores; 4 percent gypsum by weight; strongly effervescent (25 percent calcium carbonate equivalent); moderately alkaline (pH 8.0); clear wavy boundary. (8 to 13 inches thick)
Byzg1--14 to 27 inches; light gray (2.5Y 7/2) clay, light brownish gray (10YR 6/2) moist; moderate coarse angular blocky structure parting to strong medium subangular blocky; very hard, very firm, very sticky and very plastic; very few medium and very few fine roots; few fine and few very fine tubular pores; few fine irregularly shaped gypsum crystals between peds (3 percent gypsum by weight); common fine irregularly shaped salt crystals between peds; common distinct pressure faces between peds; many medium prominent yellowish brown(10YR 5/8) masses of redox concentrations in the matrix; strongly effervescent (25 percent calcium carbonate equivalent); strongly alkaline (pH 8.5); gradual wavy boundary. (10 to 16 inches thick)
Byzg2--27 to 42 inches; light gray (5Y 7/2) clay, moist color; massive; rigid, very sticky and very plastic; very few medium and very few fine roots; few fine and few very fine tubular pores; few fine gypsum crystals located between ped faces (2 percent gypsum by weight); many fine salt crystals located between ped faces; many prominent pressure faces; many coarse prominent yellowish brown (10YR 5/8) masses of redox concentrations in the matrix and gray (10YR 6/1) redox depletions in the matrix; strongly effervescent (24 percent calcium carbonate equivalent); strongly alkaline (pH 8.7); gradual wavy boundary. (12 to 18 inches thick)
2BCzg--42 to 60 inches; light gray (5Y 7/2) clay, greenish gray (10Y 6/1) moist, massive; rigid, very sticky and very plastic; very few medium and very few fine roots; few fine and few very fine tubular pores; many fine salt crystals located between ped faces; many prominent pressure faces; many medium prominent yellowish brown (10YR 5/8) masses of redox concentrations in the matrix; strongly effervescent (24 percent calcium carbonate equivalent); strongly alkaline (pH 8.7); gradual wavy boundary.
TYPE LOCATION: Santa Fe County, New Mexico; about 2 miles southeast of White Lakes; 3000 feet north and 30 feet west of the SE corner of Section 18, T.11N., R.11E.; USGS White Lakes 7.5 minute topographic quadrangle; Latitude 35 degrees 10 minutes 47.4 seconds North and Longitude 105 degrees 48 minutes 11.7 seconds West, NAD 27
RANGE IN CHARACTERISTICS:
Soil moisture - The soil moisture control section is intermittently moist in some part from July to October and December to March. It is assumed to be dry in all parts for less than 75 percent of the time (cumulative), when the soil temperature at 20 inches is 41 degrees F. or higher. The soils are driest in May and June. The soil moisture regime is ustic aridic.
Mean annual soil temperature 49 to 51 degrees F.
Depth to base of cambic horizon - 10 to 20 inches
Particle-size control section weighted averages -
Silicate clay content: 40 to 60 percent
Sand content: 20 to 35 percent
Fine sand or coarser content: 10 to 20 percent
Rock fragment content: less than 1 percent gravel
A horizon
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 2 or 3, dry or moist
Clay content: 30 to 40 percent
Calcium carbonate equivalent: 15 to 25 percent
Gypsum content: 0 to 2 percentEC: 0 to 2 ds/m
SAR: 0 to 4
Btyz horizon
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 3 or 4, dry or moist
Texture: clay or silty clay
Clay content: 40 to 60 percent
Calcium carbonate equivalent: 15 to 25 percent
Gypsum content: 0 to 5 percentEC, ds/m: 4 to 8
SAR: 5 to 13
2Byzg horizons
Value: 6 or 7 dry, 5 or 6 moist
Chroma: 2 or 3, dry or moist
Texture: clay or silty clay
Clay content: 40 to 60 percent
Calcium carbonate equivalent: 15 to 25 percent
Gypsum content: 1 to 5 percent
EC, ds/m: 8 to 16
SAR: 13 to 30
COMPETING SERIES: There are currently no competing series. A similar soil in another family is the Galisteo (NM) series. Galisteo soils have a superactive activity class.
GEOGRAPHIC SETTING: Triane soils are on rims of playa. They formed in eolian material over local slope alluvium derived from Triassic age shale. Slopes are 1 to 3 percent. Elevation ranges from 6,200 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. The mean annual air temperature is 49 to 51 degrees F. The frost-free period is 150 to 170 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kwahe and Stanley soils. Kwahe soils are fine, do not have cambic horizons, and occur on playa steps. Stanley soils are very-fine, do not have cambic horizons, and occur on playa floors.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; moderate surface runoff; permeability is very slow.
USE AND VEGETATION: Triane soils are used for livestock grazing and wildlife habitat. Present vegetation is fourwing saltbush and alkali sacaton.
DISTRIBUTION AND EXTENT: Triane soils are of small extent on the northeastern Estancia Basin part of the Mexican Highlands section of the Basin and Range physiographic province in northcentral New Mexico. The MLRA is 70C.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona.
SERIES PROPOSED: Santa Fe County, New Mexico; Santa Fe Area Soil Survey Update; 2002. Triane is a coined name.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - surface to a depth of about 4 inches. (A horizons)
Cambic horizon - 4 to about 14 inches. (Bt horizon)
Particle-size control section - The zone from 4 to 14 inches. (Bt horizon)
Classified according to Soil Taxonomy Tenth Edition, 2006.
Note: Although the Bt horizon appears to have clay films, lab data does not support criterion 2.c. of the required characteristics for an argillic horizon.
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-02-049-010; Calcium carbonate equivalence was determined using a field calcimeter.