LOCATION TYLERPEAK WAEstablished Series
TAXONOMIC CLASS: Medial-skeletal, ferrihydritic Typic Haplocryands
TYPICAL PEDON: Tylerpeak extremely gravelly medial sandy loam - forestland, on a 70 percent northeast-facing slope at an elevation of 3,845 feet in an Pacific silver fir/Pacific rhododendron plant association. (When described on May 27, 1993, the soil was moist throughout. Colors are for moist soil unless otherwise stated. All textures are apparent field textures.)
Oi--0 to 1 inch; slightly decomposed needles, leaves, and twigs; abrupt smooth boundary. (1 to 2.5 inches thick)
A--1 to 6 inches; very dark grayish brown (10YR 3/2) extremely gravelly medial sandy loam, brown (10YR 5/3) dry; weak very fine and fine granular structure; slightly hard, friable, nonsticky and nonplastic; weakly smeary; many very fine and fine and common medium and coarse roots; common very fine and fine irregular pores; 50 percent gravel, 15 percent cobbles; strongly acid (pH 5.4); clear wavy boundary. (3 to 7 inches thick)
AB--6 to 15 inches; dark brown (10YR 3/3) extremely gravelly medial sandy loam, yellowish brown (10YR 5/4) dry; weak very fine and fine granular and weak very fine and fine subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; weakly smeary; many very fine and fine and common medium and coarse roots; common very fine and fine irregular pores; 45 percent gravel, 25 percent cobbles; moderately acid (pH 5.6); clear wavy boundary. (4 to 10 inches thick)
Bw--15 to 31 inches; dark yellowish brown (10YR 3/6) extremely cobbly medial sandy loam, brownish yellow (10YR 6/6) dry; weak very fine subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; weakly smeary; common very fine, fine, medium, and coarse roots; common very fine and fine irregular pores; 30 percent gravel, 50 percent cobbles; moderately acid (pH 5.6); abrupt wavy boundary. (10 to 25 inches thick)
R--31 inches; hard metavolcanic rock.
TYPE LOCATION: Clallam County, Washington, about 3/4 mile south-southwest of Bon Jon Pass, about 1,255 feet west and 1190 feet south of the northeast corner of section 26, T. 28 N., R. 3 W. (Latitude 47 degrees, 53 minutes, 34 seconds N., Longitude 123 degrees, 01 minutes, 01 seconds W.)
RANGE IN CHARACTERISTICS: Mean annual soil temperature is 43 to 45 degrees F. The mean winter soil temperature is 37 to 41 degrees F. The mean summer soil temperature is 45 to 47 degrees F. These soils are usually moist, and are dry in soil moisture control section for 30 to 45 consecutive days following the summer solstice; udic soil moisture regime.. Depth to bedrock is 20 to 40 inches. The umbric epipedon is 7 to 15 inches thick. The particle-size control section from the mineral soil surface to the bedrock contact has andic soil properties and 60 to 90 percent rock fragments by volume. The andic soil material has an estimated moist bulk density of 0.70 to 0.90 g/cc, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 2 to 3 percent, phosphate retention of 85 to 100 percent and a 15-bar water retention of 15 to 30 percent for air dried samples. It has 1 to 2 cmol/kg of aluminum. Acid oxalate extractable iron is 1.5 to 3.0 percent. The lower part of the particle size control section has 10 to 20 percent clay by apparent field texture.
The A and AB horizon has chroma of 2 or 3 moist and 3 or 4 dry. It has 5 to 10 percent organic matter with less than 7 percent below a depth of about 10 inches.
The Bw horizon has hue of 10YR or 7.5YR, value of 5 or 6 dry, and chroma of 3, 4, or 6 moist and 4 or 6 dry. It is extremely gravelly medial sandy loam, extremely cobbly medial sandy loam, or extremely gravelly medial loam. Reaction is slightly acid or moderately acid. It has 1 to 7 percent organic matter.
COMPETING SERIES: These are the Balcher, Blackjack, Fahnestock, Kahkwa, Mueller, Musgrove, Sniderpeak, Sorethumb and Stonybrook series. Balcher soils are moderately well drained with dense glacial till at 40 to 60 inches. Blackjack, Fahnestock, Kahkwa, Musgrove, Sniderpeak, Sorethumb and Stonybrook soils are dry for 0 to 30 days and have over 70 inches of precipitation as a minimum. Mueller, Fahnestock, Musgrove, Blackjack and Kahkwa soils are over 40 inches deep to bedrock.
GEOGRAPHIC SETTING: Tylerpeak soils are on mountains. Slopes are 60 to 90 percent. The soils formed in colluvium from marine basalt and associated volcanic rocks. Elevations are 2,900 to 4,200 feet. Average annual precipitation is 40 to 70 inches. Average annual temperature is 41 to 43 degrees F. and frost-free season is 130 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bungalow and Mueller soils. Bungalow soils are on mountain slopes and are 4 to 10 inches to bedrock. Mueller soils are on mountain slopes and are very deep.
DRAINAGE AND PERMEABILITY: Well drained; medium to very rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Timber production, wildlife habitat, recreation, and watershed. Native vegetation is western hemlock, Pacific silver fir, western redcedar, Pacific rhododendron, red huckleberry, and western swordfern.
DISTRIBUTION AND EXTENT: Clallam and Jefferson Counties, Washington; MLRA 3. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clallam County, Washington, 2000; Olympic National Forest.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Umbric epipedon - 1 to 15 inches (A and AB horizons)
Cambic horizon - 15 to 31 inches (Bw horizon)
Andic soil properties - 1 to 31 inches (A and AB horizons)
Lithic contact - 31 inches
Particle-size control section - 1 to 31 inches (A, AB, and Bw horizons)
All depths to diagnostic horizons and other features are measured from the top of the first mineral horizon.