LOCATION GOLARS OR
Tentative Series
IRD. SCW/TDT
03/2013
GOLARS SERIES
The Golars series consists of moderately deep, well drained soils formed in residuum from basalt or tuff with an influence of ash in the surface. Golars soils are on benches and plateaus. Slopes are 2 to 20 percent slopes. The mean annual precipitation is about 15 inches, and the mean annual temperature is 43 degrees F.
TAXONOMIC CLASS: Fine, smectitic, frigid Vertic Palexerolls
TYPICAL PEDON: Golars ashy loam - forestland, on a 5 percent slope at an elevation of 3,410 feet. (When described on September 3, 2003, the soil was dry throughout. Colors are for moist soil unless otherwise noted.)
Oi--0 to 1 inch; partially decomposed pine needles and twigs.
A--1 to 2 inches; very dark grayish brown (10YR 3/2) ashy loam, grayish brown (10YR 5/2) dry; weak thin platy structure; slightly hard, friable, slightly sticky and slightly plastic; few fine and common very fine roots; few fine and common very fine irregular pores; neutral (pH 6.9); abrupt smooth boundary. (1 to 7 inches thick)
2Bt1--2 to 14 inches; dark brown (10YR 3/3) clay, brown (10YR 5/3) dry; strong moderate and coarse subangular blocky structure; very hard, very firm, very sticky and very plastic; few medium and fine and common very fine roots; few fine and common very fine tubular pores; many distinct clay films on ped faces; neutral (pH 7.0); gradual wavy boundary.
2Bt2--14 to 21 inches; dark brown (10YR 3/3) clay, brown (10YR 5/3) dry; strong medium subangular blocky structure; very hard, very firm, very sticky and very plastic; few coarse, medium, and fine and common very fine roots; few medium, fine, and very fine tubular pores; many distinct clay films on ped faces; neutral (pH 7.1); clear wavy boundary.
2Bt3-- 21 to 30 inches; dark brown (10YR 3/3) cobbly clay, brown (10YR 5/3) dry; strong fine and medium subangular blocky structure; very hard, very firm, very sticky and very plastic; few fine and common very fine roots; few very fine tubular pores; common distinct clay films on ped faces; 20 percent cobbles and 10 percent gravel; neutral (pH 7.2); abrupt wavy boundary. (Combined thickness of the 2Bt horizon is 18 to 38 inches)
2R--30 inches; fractured basalt.
TYPE LOCATION: Grant County, Oregon, located about 7 miles NW of the town of Monument; 1,000 feet west and 1,400 feet north of the SE corner of section 3, T. 8 S., R. 27 E. (Latitude 44 degrees, 53 minutes, 59.74 seconds N. and Longitude 119 degrees, 28 minutes, 28.41 seconds W.)
RANGE IN CHARACTERISTICS: The soils are usually moist but are dry between depths of 4 to 12 inches for 60 to 90 consecutive days during the summer. The mean annual soil temperature is 47 to 52 degrees F. Depth to bedrock is 20 to 40 inches. The mollic epipedon is 20 to 30 inches thick and includes all or a part of the argillic horizon. Hue is 10YR or 7.5YR throughout. There is an abrupt increase in clay of 15 to 25 percent between the A and 2Bt horizons. Base saturation is over 75 percent throughout the solum.
The A horizon has values of 2 or 3 moist, 4 or 5 dry, and chroma of 1 or 2 moist and dry. It is loam with 18 to 25 percent clay. It has 0 to 5 percent cobbles and 0 to 10 percent gravel. It has 10 to 30 percent glass and acid oxalate aluminum plus one-half the iron is 0.2 to 0.5 percent.
The 2Bt horizon has values of 2 or 3 moist, 4 or 5 dry, and chroma of 2 or 3 moist and dry. It is clay or silty clay with 40 to 50 percent clay. It has 0 to 20 percent cobbles and 0 to 15 percent gravel in the horizon just above the bedrock.
COMPETING SERIES: These are the
Booth,
Campcreek,
Carryback,
Crowcamp,
Hankins,
Jesh,
Joenchris,
Lacrol,
Tippett, and
Zumwalt series. Booth, Campcreek, Carryback, Jesh, Joenchris, Lacrol, Tippett, and Zumwalt soils lack an O horizon and are not pachic. Campcreek, Crowcamp, Hankins, Jesh, Joenchris, Lacrol, and Tippett soils are deep or very deep.
GEOGRAPHIC SETTING: Golars soils are on benches or plateaus. They occur as either mounds in pattern ground or as continuous bodies. Slopes are 2 to 20 percent. They formed in residuum from basalt or tuff with an influence of ash in the surface. Elevation is 3,300 to 5,000 feet. The climate is characterized by cold wet winters and hot dry summers. The mean annual temperature is 41 to 45 degrees F. and the mean annual precipitation is 14 to 17 inches. The frost-free period is 30 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Exfo,
Gwin,
Hankins,
Rockly,
Tolo,
Top, and
Wrightman soils. Exfo soils are found at lower elevations in exfoliating basalt on steep, south slopes, are very shallow to bedrock, and are sandy-skeletal. Gwin and Rockly soils are found on steep, south slopes, are loamy-skeletal, and are less than 20 inches to bedrock. Hankins soils are found on rolling plateaus and benches and are very deep or deep to bedrock. Tolo soils are on north slopes, are ashy over loamy, and are very deep. Top soils are also on north slopes and are very deep. Wrightman soils are on plateaus or benches, are fine-loamy, and lack an O horizon.
DRAINAGE AND PERMEABILITY: Well drained; slow permeability.
USE AND VEGETATION: These soils are used for timber production, livestock grazing, and wildlife habitat. Potential native vegetation is Ponderosa pine, common snowberry, Idaho fescue, and bluebunch wheatgrass (USFS Plant Association CPS5-24).
DISTRIBUTION AND EXTENT: East-central Oregon; MLRA 10. Series is of minor extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Grant County, Oregon, 2005. The name is derived from Golars Goat Trail located in the Granite area.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - (pachic) - from 1 to 30 inches (A, 2Bt1, 2Bt2, and 2Bt3 horizons)
Argillic horizon - from 2 to 30 inches (2Bt1, 2Bt2, and 2Bt3 horizons)
Pale feature - 20 percent increase in clay from the A to the 2Bt1 horizon
Particle size control section - from 2 to 22 inches (2Bt1, 2Bt2, and the upper part of the 2Bt3 horizon)
Vertic subgroup - the calculated LE is 6.48 cm within the upper meter
Xeric moisture regime
National Cooperative Soil Survey
U.S.A.