LOCATION FARLOW WYEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Calcic Haplocryolls
TYPICAL PEDON: Farlow channery loam - on a southwest facing 40 percent slope utilized as rangeland. (Colors are for dry soil unless otherwise stated.)
A--0 to 9 inches; dark grayish brown (10YR 4/2) channery loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft; very friable, slightly sticky and nonplastic; slightly effervescent, calcium carbonate disseminated; 20 percent channers; moderately alkaline (pH 8.2); abrupt smooth boundary. (6 to 12 inches thick)
Bw--9 to 17 inches; brown (10YR 5/3) very channery loam, brown (10YR 4/3) moist; moderate coarse prismatic structure; soft, very friable, slightly sticky and slightly plastic; strongly effervescent, calcium carbonate disseminated and as few fine and medium soft masses; 50 percent channers; strongly alkaline (pH 8.6); clear wavy boundary. (0 to 12 inches thick)
Bk1--17 to 30 inches; very pale brown (10YR 8/3) extremely channery loam, pale brown (10YR 6/3) moist; massive; soft, very friable, slightly sticky and slightly plastic; violently effervescent, calcium carbonate disseminated throughout the matrix and as many distinct soft masses, threads, filaments, and coatings on rock fragments; 60 percent channers; strongly alkaline (pH 8.6); gradual wavy boundary.
Bk2--30 to 46 inches; very pale brown (10YR 7/3) extremely channery loam, pale brown (10YR 6/3) moist; massive; soft, very friable, slightly sticky and nonplastic; violently effervescent, calcium carbonate as many prominent soft masses, threads, and coatings on all rock fragments; 65 percent channers; strongly alkaline (pH 8.6); abrupt wavy boundary.
R--46 to 60 inches; limestone with fractures more than 10 inches apart and no apparent displacements.
TYPE LOCATION: Fremont County, Wyoming; approximately 1,800 feet north and 240 feet east of the SW corner of sec. 18, T. 30 N., R. 99 W. Miners Delight Quadrangle. 42 degrees 34 minutes 16 seconds north latitude and 108 degrees 43 minutes 2 seconds west longitude.
RANGE IN CHARACTERISTICS: Depth to hard limestone and lithic contact ranges from 40 to 80 inches. Depth to continuous horizons of carbonate accumulation ranges from 6 to 20 inches. The mean annual soil temperature ranges from about 35 to 45 degrees F., and the mean summer soil temperature ranges from about 53 to 58 degrees F. The particle size control section has matrix texture of loam, clay loam, or sandy clay loam with 18 to 35 percent clay. Rock fragments average from 35 to 80 percent and consist of channers, cobbles, or angular gravel with 0 to 15 percent flagstones near the lithic contact.
The A horizon has hue of 2.5Y or 10YR, value of 3 through 5 dry, 2 or 3 moist, and chroma of 2 or 3. Reaction is neutral through moderately alkaline.
The Bw or BA horizon has hue of 2.5Y or 10YR, value of 4 through 7 dry, 3 through 6 moist, and chroma of 2 through 4. Reaction is slightly alkaline through strongly alkaline.
The Bk horizon has hue of 2.5Y or 10YR, value of 5 through 8 dry, 4 through 7 moist, and chroma of 2 through 4. Calcium carbonate equivalent ranges from 15 to 40 percent. This is a diagnostic calcic horizon. Reaction is moderately alkaline or strongly alkaline. A C horizon is present in some pedons above the lithic contact.
COMPETING SERIES: These are the Antrobus, Basinpeak (T), Broad Canyon, Decram, Fairydell, Foxmount, Gaia (T) Grafen, Greyback, Handran, Kamack, Klug (T), Krackle (T), Lag (T), Maurice, McCort (T), Middlehill, Midelight, Midfork, Parachute, Rockabin, Sebud, Silvercliff, Sup, Supervisor, Teemat (T), Thornburgh, Tiban, Timmercrek (T), Tineman and Wareagle series. The Antrobus, Basinpeak, Broad Canyon, Gaia, Greyback, Handran, Klug, Lag, Maurice, McCort, Midfork, Sebud, Silvercliff, Sup, Teemat, Thornburgh, Tiban, Timmercrek, and Wareagle soils are very deep. Decram, Foxmount, Grafen, Krackle, Middlehill, Parachute, Rockabin, and Supervisor soils are moderately deep. Fairydell soils have accumulations of silica in the Bk horizon. Kamack and Tineman soils are non-calcareous throughout. Midlight soils lack a diagnostic calcic horizon.
GEOGRAPHIC SETTING: Farlow soils are on mountain and hill footslopes, backslopes, and upper toeslopes. It is also on terraces and upper fan aprons. These soils formed in residuum and colluvium weathered primarily from limestone and calcareous sandstone. Slopes are 5 to 65 percent. Elevations are 6,000 to 9,000 feet. In Colorado elevations are as high as 10,250 feet The mean annual precipitation is about 15 inches but ranges from 13 to 25 inches. The mean annual temperature is about 35 degrees but ranges from 33 to 44 degrees F. The estimated frost-free season is 60 days or less depending upon elevation, aspect, and air drainage.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cloud Peak and Duncom soils. Cloud Peak soils have an argillic horizon. Duncom soils have bedrock at 10 to 20 inches.
DRAINAGE AND PERMEABILITY: Well drained; rapid or medium runoff depending upon slope; moderate permeability.
USE AND VEGETATION: Rangeland and wildlife habitat. Native vegetation is Idaho fescue, big sagebrush, Columbia needlegrass, western wheatgrass, and mountain brome.
DISTRIBUTION AND EXTENT: Mountains of Wyoming and Colorado. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Fremont County, Lander Area, Wyoming; 1975.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
mollic epipedon - 0 to 9 inches (A)
cambic horizon - 9 to 17 inches (Bw)
calcic horizon - 9 to 46 inches (Bk1, Bk2)
lithic contact - 46 inches (R)
MLRR- E
SIR- WY0245, WY0611, WY0656, WY0834, WY1181