LOCATION JACONITA NMEstablished Series
TAXONOMIC CLASS: Sandy-skeletal, mixed, mesic Ustic Haplocalcids
TYPICAL PEDON: Jaconita very gravelly coarse sandy loam--on the backslope of an erosional fan remnant sloping 24 percent to the southwest at 6,420 feet elevation--rangeland. (Colors are for dry soil unless otherwise noted. When described, the soil was dry from 0 to 45 inches and moist below 45 inches.)
ABk--0 to 2 inches; brown (7.5YR 5/3) very gravelly coarse sandy loam, dark brown (7.5YR 3/3) moist; weak fine granular structure; soft, very friable, slightly sticky and nonplastic; few fine and common very fine roots; 40 percent gravel and 10 percent cobbles; slightly to strongly effervescent, secondary calcium carbonate segregated as few fine irregularly shaped coats on rock fragments; slightly alkaline (pH 7.8); clear smooth boundary. (2 or 3 inches thick)
Bk1--2 to 6 inches; brown (7.5YR 5/3) very gravelly coarse sandy loam, brown (7.5YR 4/3) moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and nonplastic; few fine and many very fine roots; 45 percent gravel and 10 percent cobbles; violently effervescent, secondary calcium carbonate segregated as common fine and medium irregularly shaped coats on rock fragments; moderately alkaline (pH 8.2); clear wavy boundary. (4 to 6 inches thick)
Bk2--6 to 14 inches; light reddish brown (5YR 6/4) extremely gravelly loamy coarse sand, yellowish red (5YR 4/6) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and nonplastic; few fine and common very fine roots; 65 percent gravel and 10 percent cobbles; violently effervescent, secondary calcium carbonate segregated as many fine and medium irregularly shaped coats on faces of peds and on rock fragments; moderately alkaline (pH 8.4); abrupt irregular boundary. (6 to 10 inches thick)
Bk3--14 to 45 inches; reddish brown (5YR 5/4) very gravelly coarse sand, yellowish red (5YR 4/6) moist; single grain; loose, nonsticky and nonplastic; few fine and very fine roots; 45 percent gravel and 5 percent cobbles; slightly to strongly effervescent, secondary calcium carbonate segregated as common medium and large irregularly shaped coats on rock fragments and very coarse sand grains; moderately alkaline (pH 8.2); abrupt smooth boundary. (9 to 31 inches thick)
Bk4--45 to 56 inches; yellowish red (5YR 5/6) very gravelly loamy coarse sand, yellowish red (5YR 4/6) moist; massive; soft, very friable, slightly sticky and nonplastic; few very fine roots; 40 percent gravel; slightly effervescent, secondary calcium carbonate segregated as few fine irregularly shaped coats on rock fragments; moderately alkaline (pH 8.4); clear smooth boundary. (9 to 19 inches thick)
C1--56 to 78 inches; yellowish red (5YR 5/6) gravelly coarse sand, yellowish red (5YR 4/6) moist; massive; soft, very friable, slightly sticky and nonplastic; few very fine pores; 25 percent gravel; very slightly effervescent, secondary calcium carbonate segregated as very few fine irregularly shaped coats on rock fragments; moderately alkaline (pH 8.4); clear wavy boundary. (10 to 28 inches thick)
C2--78 to 92 inches; yellowish red (5YR 5/6) very gravelly coarse sand, yellowish red (5YR 4/6) moist; massive; loose, nonsticky and nonplastic; 40 percent gravel; slightly effervescent, secondary calcium carbonate segregated as very few fine irregularly shaped coats on rock fragments; moderately alkaline (pH 8.4); clear smooth boundary. (9 to 20 inches thick)
C3--92 to 104 inches; reddish yellow (7.5YR 6/6) loamy fine sand, strong brown (7.5YR 4/6) moist; massive; soft, very friable, slightly sticky and nonplastic; 5 percent gravel; very slightly effervescent; moderately alkaline (pH 8.0); clear smooth boundary. (0 to 14 inches thick)
C4--104 to 118 inches; light brown (7.5YR 6/4) fine sand, brown (7.5YR 4/4) moist; massive; soft, very friable, nonsticky and nonplastic; 5 percent gravel; slightly effervescent; moderately alkaline (pH 8.2).
TYPE LOCATION: Santa Fe County, New Mexico; about 2.5 miles west of Agua Fria; 2,475 feet east and 1,650 feet south of the northwest corner of section 35, T.17N., R.8E.; USGS Agua Fria 7.5 minute topographic quadrangle; Latitude 35 degrees 39 minutes 47 seconds North and Longitude 106 degrees 3 minutes 47 seconds West, NAD 27.
RANGE IN CHARACTERISTICS:
Soil moisture - The soil moisture control section is intermittently moist from July to October and December to March. The soils are driest in May and June. The soil moisture regime is aridic bordering on ustic.
Mean annual soil temperature - 52 to 54 degrees F.
Depth to calcic horizon - 2 or 3 inches
Lithology of rock fragments: granite, gneiss, and schist
Particle-size control section (weighted averages)
Silicate clay content: 2 to 10 percent
Rock fragment content: 35 to 70 percent, mostly gravel
Reaction - slightly alkaline in the surface; moderately alkaline in the underlying material
Salinity, mmhos/cm - 0 to 1 in the surface and upper part of the underlying material; 0 to 2 in the lower part of the underlying material
Sodicity, SAR - 0 to 1
ABk horizon
Value: 5 or 6 dry, 3 or 4 moist
Chroma: 2 or 3 moist
Rock fragments: total range is 35 to 55 percent
30 to 45 percent gravel
5 to 10 percent cobbles
Calcium carbonate equivalent: 1 to 3 percent
Upper Bk horizons
Hue: 5YR or 7.5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 2 through 4 dry, 3 through 6 moist
Texture: very gravelly coarse sandy loam, extremely gravelly loamy coarse sand, and very gravelly loamy coarse sand
Rock fragments: total range is 35 to 75 percent, averaging 40 to 65 percent
40 to 55 percent gravel
0 to 10 percent cobbles
Calcium carbonate equivalent: 5 to 15 percent
Lower Bk horizons
Hue: 5YR or 7.5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 4 or 6, dry or moist
Texture: very gravelly coarse sand, very gravelly loamy coarse sand, and extremely gravelly coarse sand
Rock fragments: total range is 35 to 75 percent
35 to 65 percent gravel
0 to 10 percent cobbles
Calcium carbonate equivalent: 1 to 3 percent
upper C horizons
Hue: 5YR or 7.5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 4 or 6, dry or moist
Texture: gravelly coarse sand, very gravelly coarse sand, very gravelly loamy coarse sand, and extremely gravelly coarse sand
Rock fragments: total range is 25 to 70 percent gravel
25 to 65 percent gravel
0 to 5 percent cobbles
lower C horizons
Hue: 5YR or 7.5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 4 or 6, dry or moist
Texture: stratified fine sand to loam
Rock fragments: 0 to 5 percent gravel
Other features: some pedons have buried horizons ranging in texture from gravelly sandy loam to very gravelly coarse sand.
COMPETING SERIES: These are the Cascajo(CO) and Shoegame(AZ) series. Cascajo soils have 5 to 30 percent cobbles in the C horizons. In addition, Cascajo soils are in the Western Great Plains (LRR-G MLRA 69) and are more moist in May and June. Shoegame soils have yellower hues.
GEOGRAPHIC SETTING: Jaconita soils are on footslopes and backslopes of erosional fan remnants and risers of strath terrace remnants. They formed in alluvium derived from Precambrian granite, gneiss, schist, and Tertiary micaceous sandstone and siltstone. Slopes are 10 to 60 percent. Elevation ranges from 5,400 to 6,900 feet. The mean annual precipitation is 9 to 13 inches with about 45 percent falling as rain from high-intensity convective thunderstorms between July and September. The mean annual air temperature is 50 to 52 degrees F. The frost-free period is 150 to 170 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Khapo, Panky, Agua Fria, Xenmack, and Zozobra soils. Khapo soils are coarse-loamy, have argillic horizons, and occur on adjacent toeslopes of erosional fan remnants. Panky and Agua Fria soils are fine-loamy, have argillic horizons, and occur on summits of erosional fan remnants. Xenmack soils are fine-loamy, are moderately deep to a paralithic contact, and occur on adjacent risers of strath terrace remnants. Zozobra soils are coarse-loamy over sandy or sandy-skeletal, have calcic horizons, and occur on adjacent shoulders of erosional fan remnants.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; medium surface runoff; moderately rapid permeability in the upper part of the profile and very rapid permeability in the underlying sandy material.
USE AND VEGETATION: Jaconita soils are used for urban development, livestock grazing, and recreation. The historic climax vegetation is blue grama, sideoats grama, black grama, galleta, New Mexico feathergrass, twoneedle pinyon, and oneseed juniper. The ecological site is Gravelly(R036XB114NM).
DISTRIBUTION AND EXTENT: Jaconita soils are of small extent on the southeastern Espanola Basin part of the Basin and Range province in northcentral New Mexico. The MLRA is 36.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Santa Fe County, New Mexico; Santa Fe Area Soil Survey Update; 2008. Jaconita is a the name of a city.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to a depth of about 2 inches. (ABk horizon)
Calcic horizon - The zone from 2 to about 14 inches. (Bk1 and Bk2 horizons)
Particle-size control section - The zone from 10 to 40 inches (part of Bk2, part of Bk3 horizons)
Series control section - The zone from 0 to 60 inches.
Classified according to Keys to Soil Taxonomy Tenth Edition, 2006.