LOCATION TOLANY OREstablished Series
TAXONOMIC CLASS: Medial, ferrihydritic, frigid Alic Hapludands
TYPICAL PEDON: Tolany medial loam - forested. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 1 inch; twigs, moss and woody materials.
A1--1 to 8 inches; dark reddish brown (5YR 3/3) medial loam, brown (7.5YR 5/4) dry; moderate very fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; weakly smeary; many very fine roots; many very fine tubular pores; 15 percent 1 to 3 millimeter concretions; strongly acid; clear smooth boundary. (7 to 9 inches thick)
A2--8 to 18 inches; dark reddish brown (5YR 3/4) medial silt loam, brown (7.5YR 5/4) dry; moderate very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; weakly smeary; many very fine roots; many very fine tubular pores; 15 percent 1 to 3 millimeter concretions; moderately acid; gradual wavy boundary. (6 to 11 inches thick)
Bw1--18 to 28 inches; reddish brown (5YR 4/4) medial silt loam, light reddish brown (5YR 6/4) dry; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; weakly smeary; common very fine roots; many very fine tubular pores; 5 percent 1 to 3 millimeter concretions; moderately acid; gradual wavy boundary. (7 to 15 inches thick)
Bw2--28 to 41 inches; reddish brown (5YR 4/4) medial silt loam, light reddish brown (5YR 6/4) dry; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; weakly smeary; common very fine roots; many very fine tubular pores; 5 percent 1 to 3 millimeter concretions; moderately acid; gradual wavy boundary. (8 to 21 inches thick)
2Bw3--41 to 61 inches; brown (7.5YR 4/4) medial silt loam, pink (7.5YR 7/4) dry; moderate medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common fine roots; many very fine tubular pores; few dark stains on peds; moderately acid.
TYPE LOCATION: Columbia County, Oregon; 50 feet north of road in the northeast 1/4 southeast 1/4 northwest 1/4, sec. 32, T. 4 N., R. 3 W.
RANGE IN CHARACTERISTICS: The soil is usually moist but is dry for less than 45 consecutive days between depths of 4 to 12 inches. The mean annual soil temperature is 42 to 47 degrees F. Depth to bedrock is more than 60 inches. It is very strongly acid to moderately acid. It has a moist bulk density of 0.75 to 0.85 grams/cubic centimeter.
The A horizon has hue of 7.5YR or 5YR, value of 3 or 4 moist, 5 or 6 dry, and chroma of 2 to 4 moist and dry. Chromas of 2 or 3 are limited to the upper 6 inches of the A horizon. Apparent clay content ranges from 10 to 15 percent. Hard 1 to 3mm concretions range from 10 to 35 percent of which 0 to 10 percent are greater than 2mm. It is loam or silt loam.
The Bw horizon has hue of 5YR or 7.5YR, value of 3 or 4 moist, 5 or 6 dry, and chroma of 4 moist and 6 dry. Apparent clay content ranges from 15 to 25 percent. Hard 1 to 3mm concretions range from 5 to 10 percent of which 0 to 5 percent are greater than 2mm. It has 5 to 10 percent gravel and 0 to 5 percent cobbles. It is predominately medial silt loam, but is medial loam in some pedons.
If present, the C horizon has hue of 5YR or 7.5YR, value of 4 or 5 moist, 5 or 6 dry, and chroma of 6 moist and dry.
COMPETING SERIES: This is the Giveout, Marty, and Murtip series. Giveout soils have an umbric epipedon and is 20 to 40 inches to a paralithic contact. Marty soils cannot be adequately separated and needs further investigation. Murtip soils have an umbric epipedon 10 to 20 inches thick and is 40 to 60 inches to a paralithic contact.
GEOGRAPHIC SETTING: Tolany soils are on mountains at elevations of 1,500 to 2,800 feet. Slopes are 0 to 60 percent. The soils formed in colluvium from mixed sources. The climate is characterized by cool wet winters and warm moist summers. The mean annual precipitation is 60 to 80 inches. The mean January temperature is 29 to 32 degrees F; mean July temperature is 60 to 63 degrees F; and the mean annual temperature is 40 to 45 degrees F. The frost-free period is 60 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Caterl,
Laderly and competing
Murtip series. Caterl and Laderly soils are medial-skeletal
.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.
USE AND VEGETATION: These soils are used for timber production, recreation and wildlife habitat. Native vegetation is Douglas fir, western hemlock, western redcedar, red alder, vine maple, salal, red huckleberry, western swordfern and forbs.
DISTRIBUTION AND EXTENT: Coast Range in northwestern Oregon; MLRA 1. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Columbia County, Oregon, 1983.
REMARKS: Diagnostic horizons and features recognized in this pedon include:
Ochric epipedon - from 1 to 18 inches having amoist chroma of 4 (A1 and A2 horizon).
Cambic horizon - from 18 to 61 inches (Bw1, Bw2, and 2Bw3 horizons)
Andic soil properties - from surface to 61 inches.
Particle-size control section - from surface to 41 inches.
Classification revised 01/02 from an Entic Dystrandepts to an Alic Hapludands based on the Andisol Order.
Classification revised 09/03 from amorphic to ferrihydritic mineralogy based on associated soils.