LOCATION SCOGG NMEstablished Series
TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, superactive, calcareous, mesic Aeric Fluvaquents
TYPICAL PEDON: Scogg very fine sandy loam--riparian. (Colors are for dry soil unless otherwise noted. When described on August 15, 2000, the soil was dry from 0 to 2 inches, moist from 2 to 15 inches, and wet below 15 inches.)
A--0 to 3 inches; brown (10YR 5/3) very fine sandy loam, brown (10YR 4/3) moist; moderate medium granular structure; soft, very friable, slightly sticky and nonplastic; few medium, few fine, and few very fine roots; few fine interstitial pores; slightly effervescent (1 percent calcium carbonate equivalent); slightly alkaline (pH 7.6); abrupt smooth boundary. (2 to 6 inches thick)
C--3 to l5 inches; pale brown (10YR 6/3) stratified fine sand to fine sandy loam, brown (10YR 5/3) moist; massive; slightly hard, friable, slightly sticky and nonplastic; few coarse, few medium, common fine, and common very fine roots; few fine and few very fine tubular pores; few thin strata of very fine sandy loam; few fine distinct strong brown (7.5YR 5/6) redoximorphic concentrations; slightly effervescent (1 percent calcium carbonate equivalent); moderately alkaline (pH 8.0); clear smooth boundary. (3 to l2 inches thick)
Cg1--l5 to 24 inches; light brownish gray (10YR 6/2) stratified loamy fine sand to very fine sandy loam, grayish brown (10YR 5/2) moist; massive; soft, very friable, slightly sticky and nonplastic; few coarse, few medium, common fine, and common very fine roots; common very fine tubular pores; common medium prominent strong brown (7.5YR 5/6) redoximorphic concentrations, few coarse distinct very dark gray (10YR 3/1) redoximorphic depletions; positive reaction to alpha, alpha-dipyridyl; slightly effervescent (1 percent calcium carbonate equivalent); moderately alkaline (pH 8.0); clear smooth boundary. (7 to 10 inches thick)
Cg2--24 to 31 inches; gray (10YR 6/1) stratified very fine sandy loam to silt loam, gray (10YR 5/1) moist; massive; soft, very friable, slightly sticky and nonplastic; few coarse, few medium, few fine, and common very fine roots; few very fine tubular pores; common medium prominent strong brown (7.5YR 5/6) redoximorphic concentrations, common fine distinct very dark gray (10YR 3/1) redoximorphic depletions; positive reaction to alpha, alpha-dipyridyl; slightly effervescent (1 percent calcium carbonate equivalent); moderately alkaline (pH 8.0); abrupt smooth boundary. (3 to 15 inches thick)
2Cg3--31 to 81 inches; light brownish gray (10YR 6/2) very gravelly coarse sand, brown (10YR 5/3) moist; single grain; loose, nonsticky and nonplastic; few very fine roots; 35 percent gravel and 5 percent cobbles; positive reaction to alpha, alpha-dipyridyl; slightly effervescent (1 percent calcium carbonate equivalent); moderately alkaline (pH 8.0).
TYPE LOCATION: Santa Fe County, New Mexico; about 4.5 miles south-southwest of Espanola; USGS Espanola 7.5 minute topographic quadrangle; Latitude 35 degrees 55 minutes 49 seconds North and Longitude 106 degrees 6 minutes 30 seconds West, NAD 27.
RANGE IN CHARACTERISTICS:
Soil moisture - The soil moisture control sections of these soils are driest in May and June. Water within the capillary fringe moistens horizons above the upper boundary of saturation. This soil is in an aquic moisture regime; adjacent well drained soils are in an aridic (torric) moisture regime bordering on ustic.
Average annual soil temperature: 52 to 54 degrees F
Depth to redox concentrations: 2 to 4 inches
Depth to lithologic discontinuity of sandy-skeletal material: 25 to 35 inches
Depth to seasonal endosaturation: 12 to 20 inches
Lithology of rock fragments: Quartzite and granite
Particle-size control section (weighted averages)
Upper part:
Silicate clay content: 8 to 18 percent
Sand content: 55 to 75 percent
Fine sand or coarser content: 25 to 45 percent
Rock fragment content: 0 to 2 percent
Lower part:
Silicate clay content: 0 to 1 percent
Sand content: 75 to 95 percent
Fine sand or coarser content: 70 to 85 percent
Rock fragment content: 35 to 60 percent
A horizon
Value: 4 to 6 moist
Chroma: 2 or 3 moist
Clay content: 8 to 18 percent
Calcium carbonate equivalent: 1 to 3 percent
Salinity, mmhos/cm: 0 to 2
Sodicity, SAR: 0 to 4
C horizon
Value: 6 or 7 dry, 5 or 6 moist
Chroma: 2 or 3, dry or moist
Texture: stratified fine sand to very fine sandy loam; some pedons have thin strata, lenses, and laminae ranging in texture from loamy sand to loam
Clay content: 8 to 18 percent
Calcium carbonate equivalent: 1 to 3 percent
Salinity, mmhos/cm: 0 to 2
Sodicity, SAR: 0 to 4
Redox features: some pedons have few redox concentrations of iron as masses or pore linings
Other features: some pedons have subhorizons with visible sodium salts
Cg horizons
Value: 6 or 7 dry, 5 or 6 moist
Chroma: 1 or 2, dry or moist
Texture: stratified loamy very fine sand to silt loam; some pedons have thin strata, lenses, and laminae ranging in texture from silt loam to loamy fine sand
Clay content: 8 to 18 percent
Calcium carbonate equivalent: 0 to 1 percent
Salinity, mmhos/cm: 0 to 2
Sodicity, SAR: 0 to 4
Redox features: few to common concentrations of iron as masses or in pore linings
Other features: some pedons have subhorizons with visible sodium salts
2Cg horizons
Value: 6 or 7 dry, 5 or 6 moist
Chroma: 1 or 2 dry, 1 to 3 moist
Texture: very gravelly coarse sand and very gravelly sand
Clay content: 0 to 1 percent
Calcium carbonate equivalent: 0 to 1 percent
Salinity, mmhos/cm: 0 to 2
Sodicity, SAR: 0 to 4
Rock fragments: total range is 35 to 60, 30 to 45 percent gravel, 5 to 10 percent cobbles
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Scogg soils are on floodplains of valley floors. They formed in alluvium derived from quartzite and granite. Slopes are 0 to 2 percent. Elevation ranges from 5,300 to 5,600 feet. The mean annual precipitation is 9 to 12 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 Bosquecito, Mirada, and Chupe soils. Bosquecito soils are coarse-loamy, are somewhat poorly drained, and occur on slightly higher areas on flood plains of valley floors. Mirada soils are coarse-loamy, are very poorly drained, and occur on abandoned channels of flood plains of valley floors. Chupe soils are sandy, are somewhat excessively drained, and occur on low stream terraces of valley floors.
DRAINAGE AND PERMEABILITY: Poorly drained; very low surface runoff; permeability is moderately rapid in the upper part and very rapid in the lower part.
USE AND VEGETATION: Scogg soils are used for wildlife habitat and recreation. The historic climax vegetation is cottonwood, rush, sedge, and willow. The ecological site is Populus fremontii/Salix exiuga-Salix/Carex(F036XB137NM).
DISTRIBUTION AND EXTENT: Scogg 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. Scogg is a coined name.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon- The zone from the soil surface to a depth of about 3 inches. (A horizon)
Fluventic feature- Alluvial stratification present between 3 and 31 inches
Llithologic discontinuity- at 31 inches (2Cg3 horizon)
Aquic conditions- Soil reduction in all horizons between 15 and 80 inches.
Particle-size control section- The zone from 10 to 40 inches. (A, C, Cg1, Cg2, and 2Cg3 horizons)
Series control section - The zone from 0 to 60 inches.
Taxonomic version: Classified according to Keys to Soil Taxonomy, Tenth Edition, 2006.
ADDITIONAL DATA:
EC was determined with an instant EC salinity kit.