LOCATION CLAYMAN CO
Established Series
Rev. JPP-KLS
12/2022
CLAYMAN SERIES
The Clayman series consists of very deep, well drained soils that formed in alluvium, slope alluvium or colluvium derived mainly from volcanic rock. Clayman soils are on fan remnants, mountain slopes, and pediments. Slopes range from 3 to 25 percent. Mean annual precipitation is about 840 mm and the mean annual temperature is about 2.8 degrees C.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive Pachic Argicryolls
TYPICAL PEDON: Clayman loam, on an east facing, simple, 6 percent slope in rangeland at an elevation of 2,682 meters. (Colors are for dry soil unless otherwise noted.) When described on June 18, 1985 the soil was moist from 0 to 152 cm.
A1--0 to 10 cm; dark brown (10YR 3/3) loam, very dark brown (10YR 2/2) moist; moderate medium granular structure; soft, very friable, slightly sticky, slightly plastic; many fine, very fine, and few medium roots; many fine, very fine, and few medium tubular pores; neutral (pH 6.8); clear smooth boundary. (8 to 51 cm thick)
A2--10 to 48 cm; very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; strong medium granular structure; slightly hard, friable, slightly sticky, slightly plastic; many fine and very fine roots; many fine and very fine tubular pores; neutral (pH 6.6); clear smooth boundary. (0 to 46 cm thick)
Bt1--48 to 79 cm; brown (7.5YR 5/4) clay loam, dark brown (7.5YR 3/4) moist; moderate medium subangular blocky structure parting to moderate medium granular; hard, friable, moderately sticky, moderately plastic; few fine and very fine roots; many fine and very fine, and few medium tubular pores; common distinct clay films on faces of peds; neutral (pH 6.6); clear smooth boundary. (25 to 76 cm thick)
Bt2--79 to 152 cm; brown (7.5YR 5/4) clay loam, dark brown (7.5YR 3/4) moist; strong medium subangular blocky structure parting to moderate medium granular; hard, friable, moderately sticky, moderately plastic; few fine and very fine roots; few fine and very fine tubular pores; many distinct clay films on faces of peds; neutral (pH 6.6).
TYPE LOCATION: Archuleta County, Colorado; about 16 kilometers north of Chama, New Mexico; Colorado state plane coordinates 515,417 meters east and 40,386 meters north; Archuleta Creek USGS quadrangle; Lat. 37 degrees 01 minutes 18 seconds N., Long. 106 degrees 33 minutes 43 seconds W., NAD 27.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is usually moist; udic moisture regime, typic subclass.
Mean annual soil temperature: 2.2 to 4.4 degrees C.
Mean summer soil temperature: 8.9 to 10.0 degrees C.
Depth to argillic horizon: 41 to 56 cm
Thickness of the mollic epipedon: 41 to 76 cm
Particle-size control section (weighted average):
Clay content: 25 to 35 percent
Rock fragments: 0 to 20 percent
A horizon(s)
Hue: 7.5YR or 10YR
Value: 3 to 5 dry, 2 or 3 moist
Chroma: 2 or 3, dry or moist
Texture: loam
Clay content: 15 to 25 percent
Rock fragments: 0 to 15 percent
Reaction: 6.1 to 7.3
Bt horizon(s)
Hue: 7.5YR or 10YR
Value: 5 or 6 dry, 3 or 4 moist
Chroma: 3 to 6, dry or moist
Texture: clay loam, sandy clay loam, gravelly clay loam
Clay content: 25 to 35 percent
Rock fragments: 0 to 20 percent
Reaction: 6.1 to 7.3
COMPETING SERIES:
Bachus (WY) - are moderately deep to lithic contact
Bavdark (MT) - have an ustic moisture regime
Benteen (MT) - are moderately deep to lithic contact
Brushtop (ID) - have a xeric soil moisture regime
Clayburn (UT) - have an udic moisture regime bordering on xeric
Crystalbutte (ID) - have a xeric soil moisture regime
Davtone (CO) - have hues redder than 7.5YR
Dehana (ID) - have a xeric soil moisture regime
Demast (ID) - are deep to lithic contact
Dranburn (ID) - have a xeric soil moisture regime
Dranyon (ID) - have more than 20 percent rock fragments in the particle size control section
Echemoor (WY) - are moderately deep to paralithic contact
Hagenbarth (ID) - have a xeric soil moisture regime
Hoopgobel (ID) - are moderately deep to paralithic contact
Longway (ID) - have a xeric soil moisture regime
Lostminer (UT) - are moderately deep to lithic contact
Millerlake (WY) - have horizons of secondary carbonate accumulation
Odark (MT) - have an ustic soil moisture regime
Pontuge (ID) - have horizons of secondary carbonate accumulation
Senchert (UT) - are moderately deep to lithic contact
Silverjack (CO) - are not continually moist in all seasons
Southmount (ID) - have redox concentrations at 50 to 100 cm
Poodle (NV) - are moderately deep to paralithic contact
Stubbs (WY) - are moderately deep to paralithic contact
Thulepah (NV) - have a lithologic discontinuity
Vadnais (ID) - are moderately deep to lithic contact
Winu (NV) - are moderately deep to lithic contact
GEOGRAPHIC SETTING:
Landform - fan remnants, mountain slopes, and pediments
Elevation - 2,500 to 3,355 meters
Slope - 3 to 25 percent
Parent material - alluvium, slope alluvium or colluvium derived from volcanic rock
Mean annual temperature - 1.1 to 4.4 degrees C.
Mean annual precipitation - 760 to 990 mm
Precipitation pattern - wettest months are July and August; driest months are May and June, however the soils are still moist from snowmelt
Frost-free period - 50 to 75 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND PERMEABILITY: Well drained, medium runoff, moderately slow permeability.
USE AND VEGETATION: Used for livestock grazing and wildlife habitat. Vegetation is mostly Arizona fescue, needlegrass, Parry oatgrass, western wheatgrass, and mountain brome.
DISTRIBUTION AND EXTENT: Southwestern Colorado. LRR E, MLRA 48A. This series is of small extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Archuleta County, Colorado, Archuleta soil survey area, 2002. The name is coined.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 48 to 98 cm (Bt1 and part of the Bt2 horizon)
Mollic epipedon: 0 to 48 cm (A1 and A2 horizons)
Argillic horizon: 48 to 152 cm (Bt1 and Bt2 horizons)
Clayman soils are in a cryic temperature regime with a udic soil moisture class and a typic subclass.
National Cooperative Soil Survey
U.S.A.