LOCATION FLIMFLAM OR
Tentative Series
Rev. JGM/KMS
01/2017
FLIMFLAM SERIES
Landscape--western Cascade Mountains
Landform--mountain slopes
Slope--60 to 90 percent
Parent material--colluvium derived from hard extrusive igneous rock
Mean annual precipitation--2100 mm
Mean annual air temperature--about 7 degrees C
Depth class--shallow to lithic contact
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Lithic Dystrudepts
TYPICAL PEDON: Flimflam extremely gravelly sandy loam on a forested, west-facing, 85-percent mountain slope at an elevation of 1100 m (When described on September 25, 2012, the soil was dry throughout.)
Oi--0 to 5 cm; slightly decomposed plant material; abrupt smooth boundary
A--5 to 20 cm; extremely gravelly sandy loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; weak fine granular structure; friable, slightly hard, nonsticky and nonplastic; common very fine and few fine, medium, and coarse roots throughout; common fine tubular pores and many fine irregular pores; 50 percent gravel, 20 percent cobbles, and 10 percent stones; moderately acid (pH 5.7); clear smooth boundary
Bw--20 to 41 cm; extremely cobbly sandy loam, light yellowish brown (2.5Y 6/4) dry, light olive brown (2.5Y 5/4) moist; weak fine and medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; few fine, medium, and coarse roots throughout; few fine tubular pores and many fine irregular pores; 30 percent fine gravel, 40 percent cobbles, and 5 percent stones; strongly acid (pH 5.5); abrupt wavy boundary
R--41 cm; fractured andesitic rock
TYPE LOCATION: Willamette National Forest, Linn County, Oregon, about 5.2 km northwest of Tidbits Mountain; 550 m north and 640 m west of the southeast corner of section 32, T. 14 S., R. 4 E.; latitude 44.3072222, longitude -122.3554722, datum WGS 84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Dry days--less than 45 consecutive days following summer solstice
Mean annual soil temperature (at lithic contact)--5 to 7 degrees C
Depth to lithic contact--25 to 50 cm below mineral soil surface
Reaction--5.1 to 6.0 throughout all mineral horizons
Base saturation (by ammonium acetate)--less than 60 percent in zone from 25 cm to lithic contact
Oi horizon
*Thickness--0 to 8 cm
A horizon
*Hue--7.5YR to 2.5Y
*Value--3 to 5 moist, 5 or 6 dry
*Chroma--3 or 4 moist or dry
*Fine-earth texture--sandy loam
*Clay content--10 to 18 percent
*Sand content--55 to 75 percent
*Total fragment content--60 to 85 percent
*Gravel content--40 to 60 percent
*Cobble content--10 to 25 percent
*Stone content--0 to 10 percent
*Thickness--10 to 20 cm
Bw horizon
*Hue--7.5YR to 2.5Y
*Value--4 to 6 moist, 6 to 8 dry
*Chroma--3 or 4 moist or dry
*Fine-earth texture--sandy loam, loam
*Clay content--8 to 18 percent
*Sand content--50 to 75 percent
*Total fragment content--50 to 85 percent
*Gravel content--25 to 45 percent
*Cobble content--25 to 45 percent
*Stone content--0 to 10 percent
*Thickness--15 to 30 cm
COMPETING SERIES:
Euchrand--more than 20 percent clay in particle-size control section
GEOGRAPHIC SETTING:
Elevation--800 to 1200 m
Climate--warm, dry summers; cool, wet winters
Mean annual precipitation--1900 to 2300 mm
Mean annual air temperature--6 to 8 degrees C
Frost-free period--90 to 120 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Owlridge--50 to 100 cm deep to lithic contact (moderately deep); in linear areas of similar landforms
Twogirls--greater than 150 cm deep to bedrock; in concave areas and shallower areas of similar landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation during normal years--none within profile
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high, very high
USE AND VEGETATION:
Use--watershed, recreation, timber production, wildlife habitat
Potential natural vegetation--western hemlock, Douglas-fir, Pacific rhododendron, dwarf Oregon grape, red huckleberry, western swordfern, twinflower; commonly support a western hemlock/rhododendron-dwarf Oregon grape-Northwest Oregon Cascades (CHS356) plant association (Field Guide to the Forested Plant Associations of the Westside Central Cascades of Northwest Oregon)
DISTRIBUTION AND EXTENT: Western slopes of central Cascade Mountains, Oregon; MLRA 3; small extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Willamette National Forest, Linn County, Oregon; 2013; name from Flimflam Creek in Linn County
REMARKS:
Diagnostic horizons and features recognized in this pedon
*Ochric epipedon
*Particle-size control section--zone from 5 to 41 cm
*Cambic horizon--zone from 20 to 41 cm
*Depth to lithic contact--41 cm
08/2016--Some investigation should be done to determine whether the soils have ash influence, given the levels of ash in nearby soils.
ADDITIONAL DATA: Type location user site ID--2012OR043234
National Cooperative Soil Survey
U.S.A.