LOCATION SETONVILLE NMEstablished Series
TAXONOMIC CLASS: Loamy-skeletal over fragmental, mixed, superactive, mesic Calcidic Haplustalfs
TYPICAL PEDON: Setonville very gravelly sandy clay loam--on a footslope of a knoll sloping 11 percent to the east at 7,144 feet elevation-pinyon-juniper forestland. (Colors are for dry soil unless otherwise noted. When described, the soil was dry throughout.)
A--0 to 2 inches; brown (7.5YR 4/3) very gravelly sandy clay loam, dark brown (7.5YR 3/2) moist; moderate fine granular structure; soft, very friable, slightly sticky and slightly plastic; common fine and common very fine roots; few fine and few very fine irregularly shaped pores; 50 percent gravel and 5 percent cobbles; slightly alkaline (pH 7.8); abrupt smooth boundary. (2 or 3 inches thick)
Bt--2 to 8 inches; brown (7.5YR 5/3) very gravelly clay loam, brown (7.5YR 4/3) moist; weak medium and moderate fine subangular blocky structure; hard, firm, moderately sticky and moderately plastic; few coarse, few medium, common fine, and common very fine roots; few fine and few very fine tubular pores; common distinct and few prominent clay films on faces of peds; 45 percent gravel and 10 percent cobbles; slightly alkaline (pH 7.8); abrupt wavy boundary. (3 to 7 inches thick)
Btk--8 to 13 inches; light brown (7.5YR 6/4) very gravelly sandy clay loam, brown (7.5YR 4/3) moist; moderate coarse subangular blocky structure; hard, firm, moderately sticky and slightly plastic; few coarse, few medium, few fine, and few very fine roots; few fine and common very fine tubular pores; common faint clay bridges between sand grains; 40 percent gravel and 10 percent cobbles; strongly effervescent, secondary calcium carbonate segregated as common medium irregularly shaped coats on faces of peds and on rock fragments; 5 percent calcium carbonate equivalent; strongly alkaline (pH 8.6); gradual wavy boundary. (3 to 5 inches thick)
Bk1--13 to 20 inches; pinkish gray (7.5YR 7/2) gravelly sandy loam, brown (7.5YR 5/3) moist; moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few medium, few fine and few very fine roots; few fine and few very fine tubular pores; 25 percent gravel and 5 percent cobbles; violently effervescent, secondary calcium carbonate segregated as many medium and large irregularly shaped coats on faces of peds and on rock fragments; 27 percent calcium carbonate equivalent; strongly alkaline (pH 8.8) ; gradual wavy boundary. (4 to 8 inches thick).
Bk2--20 to 28 inches; pinkish white (7.5YR 8/2) very gravelly sandy loam, light brown (7.5YR 6/3) moist; weak coarse subangular blocky structure; soft, very friable, slightly sticky and nonplastic; few coarse, few medium, and few fine roots; few fine tubular pores; 30 percent gravel and 10 percent cobbles; violently effervescent, matrix is impregnated with secondary calcium carbonate; 32 percent calcium carbonate equivalent; strongly alkaline (pH 8.8); clear wavy boundary. (4 to 8 inches thick).
2BCk1--28 to 36 inches; gravel; fine earth is light gray (10YR 7/2) loamy coarse sand, light brownish gray (10YR 6/2) moist; massive; loose, nonsticky and nonplastic; few medium and few fine roots; 65 percent gravel and 30 percent cobbles; rock fragments are angular granite fragments, separated by fractures devoid of fine earth in some part; slightly to violently effervescent, secondary calcium carbonate segregated as common medium and large irregularly shaped coats on rock fragments; 5 percent calcium carbonate equivalent; strongly alkaline (pH 8.6); clear wavy boundary. (6 to 18 inches thick).
2BCk2--36 to 45 inches; cobbles; fine earth is light gray (10YR 7/2) coarse sand, light brownish gray (10YR 6/2) moist; massive; loose, nonsticky and nonplastic; few medium and few fine roots; 70 percent cobbles and 25 percent gravel; rock fragments are angular granite fragments, separated by fractures devoid of fine earth in some part; slightly to violently effervescent, secondary calcium carbonate segregated as common small and medium irregularly shaped coats on rock fragments; 2 percent calcium carbonate equivalent; strongly alkaline (pH 8.6); abrupt wavy boundary. (0 to 10 inches thick).
2R--45 inches; indurated granite bedrock
TYPE LOCATION: Santa Fe County, New Mexico; about 31/3 miles southeast of Seton Village within the nonsectionized Sebastian de Vargas Grant; USGS Seton Village 7.5 minute topographic quadrangle; Latitude 35 degrees 33 minutes 34 seconds North and Longitude 105 degrees 53 minutes 52 seconds West, NAD 27.
RANGE IN CHARACTERISTICS:
Soil moisture - The soil moisture control section is moist in all parts during the 60 days following the winter solstice. It is moist in some part less than 40 percent and moist in all parts less than 25 percent of the time when the soil temperature at 20 inches is above 41 degrees F. The soils are driest in May and June. The soil moisture regime is ustic bordering on aridic.
Mean annual soil temperature - 48 to 50 degrees F.
Depth to base of argillic horizon - 10 to 14 inches
Depth to calcareous material (as visible secondary calcium carbonate) - 6 to 9 inches
Depth to calcic horizon - 10 to 14 inches
Depth to lithic contact - 40 to 60 inches
Salinity, mmhos/cm: 0 to 2
Sodicity, SAR: 0 to 4
Lithology of rock fragments: granite, gneiss, and schist
Particle-size control section (weighted averages)
Upper part
Silicate clay content: 24 to 35 percent
Sand content: 35 to 55 percent
Fine sand or coarser content: 25 to 40 percent
Rock fragment content: total range is 40 to 60 percent with 35 to 50 percent gravel and 5 to 10 percent cobbles
Mica content: 25 to 45 percent (by grain count)
Lower part
Rock fragment content: 90 to 95 percent
A horizon
Value: 4 or 5 dry
Chroma: 2 or 3, dry or moist
Bt horizon
Chroma: 3 or 4, dry or moist
Texture: very gravelly clay loam or very gravelly sandy clay loam
Clay content: 27 to 35 percent
Rock fragment content: total range is 40 to 60 percent
35 to 50 percent gravel
5 to 10 percent cobbles
Other features: some pedons have 5 to 10 percent paragravel
Btk horizon
Value: 5 or 6 dry, 3 or 4 moist
Chroma: 3 or 4, dry or moist
Texture: very gravelly sandy clay loam or very gravelly clay loam
Clay content: 24 to 32 percent
Rock fragment content: total range is 35 to 60 percent
35 to 50 percent gravel
0 to 10 percent cobbles
Calcium carbonate equivalent: 3 to 8 percent
Other features: some pedons have 5 to 10 percent paragravel
Upper Bk horizon
Hue: 7.5YR or 10YR
Value: 7 or 8 dry, 5 or 6 moist
Chroma: 2 or 3, dry or moist
Texture: gravelly sandy loam or gravelly coarse sandy loam
Clay content: 10 to 20 percent
Rock fragment content: total range is 25 to 35 percent
20 to 30 percent gravel
0 to 10 percent cobbles
Calcium carbonate equivalent: 15 to 30 percent
Other features: some pedons have 5 to 10 percent paragravel
Lower Bk horizon
Hue: 7.5YR or 10YR
Value: 7 or 8 dry, 5 or 6 moist
Chroma: 2 or 3, dry or moist
Texture: very gravelly sandy loam or very gravelly coarse sandy loam
Clay content: 8 to 14 percent
Rock fragment content: total range is 35 to 60 percent
30 to 50 percent gravel
5 to 10 percent cobbles
Calcium carbonate equivalent: 20 to 35 percent
Other features: some pedons have 15 to 25 percent paragravel
2BCk horizons
Hue: 10YR or 2.5Y
Value: 5 through 7 dry, 4 through 6 moist
Chroma: 2 through 4, dry or moist
Texture: gravel or cobbles
Texture of fine earth: loamy coarse sand or coarse sand
Clay content: 0 to 6 percent
Rock fragment content: total range is 90 to 95 percent
20 to 75 percent gravel
20 to 70 percent cobbles
Calcium carbonate equivalent: 2 to 5 percent
Other features: some pedons have 5 to 10 percent paragravel
COMPETING SERIES: There are no competing series in this family. The Espiritu series, in a closely related family, does not have a calcic horizon and is not fragmental in the lower particle-size control section.
GEOGRAPHIC SETTING: Setonville soils are on footslopes of hills and knolls. They formed in alluvium derived locally from Precambrian granite, gneiss, and schist over residuum of Precambrian granite bedrock. Slopes are 5 to 15 percent. Elevation ranges from 7,000 to 7,600 feet. The mean annual precipitation is 14 to 16 inches with about 45 percent falling as rain from high-intensity convective thunderstorms between July and September. The mean annual air temperature is 46 to 48 degrees F. The frost-free period is 140 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Arnor, Atalaya, and Enmedio soils. Arnor soils are fine-loamy, do not have calcic horizons and fragmental materials, and occur on toeslopes of hills. Atalaya soils are coarse-loamy over fragmental, do not have calcic horizons, and occur on beveled summits. Enmedio soils are loamy-skeletal over fragmental, have mollic epipedons but do not have calcic horizons, and occur on backslopes of hills.
DRAINAGE AND PERMEABILITY: Well drained; medium surface runoff; permeability is moderately slow in the upper part and very rapid in the lower part.
USE AND VEGETATION: Setonville soils are used for urban development, cord wood products, livestock grazing, and recreation. The historic climax vegetation is bottlebrush squirreltail, black grama, oneseed juniper, and twoneedle pinyon. The ecological site is Juniperus monosperma-Pinus edulis/Fallugia parodoxa-Chrysothamnus nauseosus/Bouteloua hirsuta-Bouteloua gracilis(F036XB136NM).
DISTRIBUTION AND EXTENT: Setonville soils are of small extent on the southwestern Sangre de Cristo part of the Southern Rocky Mountains province in northcentral New Mexico. The MLRA is 48A.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Santa Fe County, New Mexico; Santa Fe Area Soil Survey Update; 2008. Setonville is a coined name from Seton Village.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - from the soil surface to a depth of 2 inches. (A horizon)
Argillic horizon - from 2 to 13 inches. (Bt and Btk horizons)
Calcic horizon - from 13 to 28 inches. (Bk1 and Bk2 horizons)
Fragmental feature - from 28 to 45 inches (2BCk1 and 2BCk2 horizons)
Lithic contact - indurated granite bedrock at 45 inches. (2R layer)
Particle-size control section - The zone from 13 to 40 inches. (Bk1, Bk2, 2BCk1, and part of 2BCk2 horizons)
Series control section - The zone from 0 to 45 inches.
Taxonomic version: Classified according to Keys to Soil Taxonomy, Tenth Edition, 2006.
ADDITIONAL DATA: Calcium carbonate equivalence was determined using a calcimeter.