LOCATION HAROLDESS               AZ

Tentative Series
JMH/HAH/NMS
05/2021

HAROLDESS SERIES

The Haroldess series consists of moderately deep, well drained soils that formed in tephra residuum. Haroldess soils are on cinder cones and volcanic fields. Slopes range from 0 to 5 percent. The mean annual precipitation is about 13 inches and the mean annual air temperature is about 50 degrees F.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Argidic Argidurids

TYPICAL PEDON: Haroldess loam - rangeland. (Colors are for dry soil unless otherwise noted.)

A--0 to 2 inch (0 to 5 cm); brown (7.5YR 5/3) loam, dusky red (7.5R 3/3), moist; 15 percent clay; strong fine granular structure; loose, loose, slightly sticky, slightly plastic; common very fine vesicular pores; 10 percent, nonflat, angular, indurated cinder gravels; noneffervescent; slightly alkaline, pH 7.6; abrupt smooth boundary.

BA--2 to 7 inches (5 to 19 cm); brown (7.5YR 4/3) loam, dusky red (7.5R 3/2), moist; 25 percent clay; moderate fine subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; many very fine and fine roots throughout; many very fine and fine dendritic tubular pores; 5 percent, nonflat, angular, indurated cinder gravels; noneffervescent; slightly alkaline, pH 7.8; clear smooth boundary.

Bt1--7 to 11 inches (19 to 29 cm); brown (7.5YR 4/2) clay loam, dusky red (7.5R 3/2), moist; 28 percent clay; strong fine subangular blocky structure; moderately hard, friable, very sticky, very plastic; common very fine roots throughout; 5 percent, nonflat, subangular, indurated cinder gravels; noneffervescent; moderately alkaline, pH 7.8; clear smooth boundary.

Bt2--11 to 17 inches (29 to 43 cm); brown (7.5YR 5/3) gravelly loam, brown (7.5YR 4/2), moist; 24 percent clay; moderate very fine subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; few very fine roots throughout; 25 percent, nonflat, angular, indurated cinders gravels; very slightly effervescent; moderately alkaline, pH 8.0; clear smooth boundary.

Bk--17 to 21 inches (43 to 54 cm); pink (7.5YR 7/3) gravelly loam, brown (7.5YR 5/3), moist; 20 percent clay; massive; slightly sticky, slightly plastic; 20 percent, nonflat, subangular, indurated cinder gravels; violently effervescent; very strongly alkaline, pH 9.0; abrupt wavy boundary.

Bqkm1 --21 to 26 inches (54 to 65 cm); silica-lime cemented pan, pinkish gray (7.5YR 7/2) dry, moist, pinkish gray (7.5YR 6/2) moist; massive with thin laminar upper surface; indurated carbonate-coated cinder gravels, violently effervescent; strongly alkaline (pH 8.8); clear wavy boundary.

Bqkm2 --26 to 30 inches (65 to 75 cm); silica-lime cemented pan, pinkish gray (7.5YR 7/2) dry, moist, pinkish gray (7.5YR 6/2) moist; massive; indurated carbonate-coated cinder gravels, violently effervescent; very strongly alkaline (pH 9.0); clear wavy boundary.

TYPE LOCATION: Coconino County, Arizona; Geographic Coordinate System: 35 35' 21.00'' north, 111 41' 14.36'' west

RANGE IN CHARACTERISTICS:
Soil moisture: Intermittently moist in some part of the soil moisture control section during July - September. Driest during May and June. Ustic Aridic soil moisture regime.

Soil Temperature: 50 to 54 degrees Fahrenheit ( to degrees Celsius)
Particle-size control section (weighted average)
Clay content: 21 to 30 percent
Rock Fragments: 5 to 20 percent cinders

Depth to argillic horizon:4 to 12 inches (10 to 30 cm)
Depth to duripan: 8 to 28 inches (20 to 70 cm)

A Horizons
Hue: 7.5YR, 10YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 2 or 3, dry or moist
Texture: loam, sandy loam
Clay: 12 to 25 percent
Rock fragments: 15 to 35 percent cinders
Reaction: slightly alkaline to moderately alkaline

BA or Bt Horizons
Hue: 7.5YR, 10YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 2 or 3 dry or moist
Texture: loam, clay loam, sandy clay loam
Clay: 18 to 32 percent
Rock fragments: 0 to 15 percent cinders

Bk Horizons
Hue: 7.5YR, 10YR
Value: 4 to 7 dry, 4 to 6 moist
Chroma: 2 to 4, dry or moist
Texture: loam
Clay: 18 to 32 percent
Calcium carbonate equivalent: 5 to 15 percent
Rock fragments: 15 to 35 percent cinders
Reaction: moderately alkaline to strongly alkaline

Bkqm and Bqm Horizons
Moderately cemented duripan

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Haroldess soils are on tephra deposits at elevations of 5,980 to 6,680 feet (1,823 to 2,036 meters). Slopes range from 0 to 8 percent. These soils formed in residuum of tephra deposits. The mean annual precipitation is 10 to 14 inches (254 to 356 millimeters) and occurs as thunderstorms during July to September as gentle rains and snowfall during December to February. The mean annual air temperature is 50 to 54 degrees Fahrenheit ( to degrees Celsius). The frost-free period is 120 to 150 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Wupatki (AZ), Wukoki (AZ), and Gemcity (AZ), soils. Gemcity soils form in basalt residuum have calcic and argillic horizons, are moderately deep, and have more than 14 percent clay and less than 35 percent gravel fragments in the particle size control section. Wupatki soils form in tephra residuum and are shallow or moderately deep to duripan, and have no argillic horizon. Wukoki soils form in tephra residuum or alluvium over residuum and are shallow to strongly contrasting particle sizes.

DRAINAGE AND PERMEABILITY: Well drained; low runoff; moderate or moderately rapid permeability.

USE AND VEGETATION: Used for livestock grazing and wildlife habitat. Vegetation includes blue grama, galleta, broom snakeweed, black grama, and fourwing saltbush.

DISTRIBUTION AND EXTENT: Northern Arizona. Haroldess soils are of limited extent. MLRA 35 Land Resource Unit 35.1.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona

SERIES ESTABLISHED: Coconino County, Arizona; Colton Crater Soil Survey Update Project, AZ, 2018

REMARKS: Diagnostic horizons and features recognized in this pedon are:

The epipedon is neither mollic nor ochric because tephra structure exists in surface fragments and within the upper two horizons.

Argillic horizon - the zone from 7 to 17 inches (19 to 43 cm) (Bt horizons)
Duripan - the zone from 21 to 60 inches (54 to 150 cm) (Bqkm or Bqm horizons)

Particle size control section - the argillic horizon (19 to 43 cm) (Bt horizons)

Classified according to Soil Taxonomy; Keys to Soil Taxonomy, Twelfth Edition, 2014

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National Cooperative Soil Survey
U.S.A.