LOCATION TIMPOWEAP UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Lithic Haplustalfs
TYPICAL PEDON: Timpoweap gravelly fine sandy loam--in a pinyon-juniper woodland on a 5 percent west facing slope at an elevation of 6,100 feet. (Colors are for dry soils unless otherwise noted.) The soil surface is covered by 55 percent gravel and 10 percent cobbles.
A--0 to 5 inches; strong brown (7.5YR 4/6) gravelly fine sandy loam, dark brown (7.5YR 3/4) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; common very fine, fine and few medium roots; common very fine tubular and vesicular pores; 20 percent gravel, 5 percent cobbles; noneffervescent; neutral (pH 7.2); clear wavy boundary. (1 to 5 inches thick)
Bt--5 to 13 inches; light reddish brown (5YR 6/4) very cobbly clay loam, yellowish red (5YR 4/6) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine, medium, and coarse roots; common very fine irregular and few fine tubular pores; common thin clay films on faces of peds, 2mm thick carbonates coatings on the undersides of rock fragments; 20 percent gravel, and 25 percent cobbles; slightly effervescent; slightly alkaline (pH 7.4); abrupt wavy boundary. (4 to 10 inches thick)
R--13 inches; Moenkopi Formation limestone bedrock.
TYPE LOCATION: Kane County, Utah; Pine Hollow Canyon Quadrangle; about 3.75 miles south-southeast of Highway 89, 800 feet south of the center of sec. 23, T. 43 S., R. 3 W.; Pine Hollow Canyon USGS quad; lat 37 degrees 03 minutes 21.52 seconds N. and long. 112 degrees 05 minutes 46.17 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: the SMCS is usually moist, in all parts, for less than 90 cumulative days from April through October. It is usually dry, in some part, for more than 120 cumulative days during the same period. It is continuously moist in some part November through March, but not moist in all parts for 45 consecutive days from January through April. The period of maximum precipitation is July through October. The soil is driest during May and June. Aridic ustic moisture regime.
Mean annual soil temperature 47 to 53 degrees F.
Depth to lithic bedrock: 4 to 20 inches
Depth to diagnostic feature: 4 to 10 inches to argillic horizon
Particle-size control section:
Clay content: 18 to 30 percent clay
A horizon
Hue: 7.5YR or 5YR
Value: 4 to 7 dry, 3 to 5 moist
Chroma: 2 to 6
Rock fragments: 15 to 25 percent limestone gravel and 0 to 10 percent cobbles
Bt horizon
Hue: 7.5YR or 5YR
Value: 4 to 6 dry, 3 to 6 moist
Chroma: 3 to 6 dry or moist
Rock fragments: 15 to 25 percent limestone gravel and 20 to 30 percent cobbles
Some pedons have Btk horizons with less than 5 percent calcium carbonate equivalent.
Other features: Calcium carbonate equivalent is less than 5 percent throughout
COMPETING SERIES: These are the
Chunkmonk (NM),
Longburn (CO),
Nees (CO) and
Pegasus (NM) series.
Chunkmonk soils have 15 to 38 percent calcium carbonate in the particle-size control section.
Longburn soils have 10YR hue and formed in sandstone.
Pegasus soil has 7.5YR and yellower hues.
GEOGRAPHIC SETTING:
Parent Material: residuum derived from limestone
Landform: dipslopes of cuestas, and structural benches
Elevation: 5,700 to 6,300 feet
Slope: 2 to 15 percent
Mean annual temperature: 45 to 51 degrees F
Mean annual precipitation: 12 to 16 inches
Frost-free period: 100 to 120 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Evpark, and Atarque soils. Atarque soils are loamy. Evpark soils are fine-loamy and have a lithic contact between 20 and 40 inches.
DRAINAGE AND PERMEABILITY: Well drained; low to medium runoff; moderate permeability.
USE AND VEGETATION: These soils are used for livestock grazing. Present vegetation is mountain big sagebrush, Mexican cliffrose, Utah juniper, two-needle pinyon, Indian ricegrass, muttongrass, and bottlebrush squirreltail. These soils have been correlated to the Upland Loam (Cliffrose) 035XY313UT ecological site at the type location in Utah.
DISTRIBUTION AND EXTENT: South central Utah and northern Arizona. MLRA 35. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Kane County, Utah, 2004; Grand Staircase Escalante National Monument soil survey area.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: The zone from 0 to 5 inches (A horizon). When soil colors meet the requirements of a mollic epipedon, the horizon is less than 4 inches thick.
Argillic horizon: The zone from about 5 to 13 inches (Bt horizon).
Lithic contact: The boundary at about 13 inches (R horizon).
Classified according to Soil Taxonomy, Second Edition, 1999; Keys to Soil Taxonomy Tenth Edition, 2006.
ADDITIONAL DATA: Laboratory analysis was performed on lab pedon number 01P0894 at the NSSL.