LOCATION CRANNLER OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic Typic Humicryepts
TYPICAL PEDON: Crannler very stony sandy loam, on an east-southeast facing convex slope of 56 percent under mixed conifers at 5,600 feet elevation. (When described the soil was moist below depth of 14 inches. Colors are for moist soil unless otherwise noted.)
A--0 to 4 inches; very dark brown (10YR 2/2) very stony sandy loam, black (10YR 2/1) crushed, dark grayish brown (10YR 4/2) dry; weak very fine and fine granular structure; soft, friable, nonsticky and nonplastic; many very fine and fine roots; many very fine pores; 15 percent pebbles, 5 percent cobbles, 30 percent stones; 3 percent of surface covered with stones; slightly acid; clear wavy boundary. (2 to 8 inches thick)
C1--4 to 14 inches; very dark grayish brown (10YR 3/2) extremely stony sandy loam, brown (10YR 5/3) dry; massive; soft, very friable, nonsticky and nonplastic; many fine and common medium and coarse roots; many very fine pores; 5 percent pebbles, 10 percent cobbles, 50 percent stones; medium acid; gradual wavy boundary. (6 to 15 inches thick)
C2--14 to 32 inches; dark brown (10YR 3/3) extremely stony sandy loam, brown (10YR 5/3) dry; massive; soft, very friable, nonsticky and nonplastic; common coarse and few medium roots; many pores; 5 percent pebbles, 10 percent cobbles, 60 percent stones; medium acid (7 to 24 inches thick)
R--32 inches; fractured quartz diorite.
TYPE LOCATION: Josephine County, Oregon; about two miles southeast of Oregon Caves National Monument; 1,360 feet south and 320 feet east of the northwest corner of section 23, T.40S., R.6W.
RANGE IN CHARACTERISTICS: Depth to bedrock is 20 to 40 inches. The mean annual soil temperature ranges from 40 degrees to 47 degrees F. and the mean summer soil temperature is less than 59 degrees F. without an O horizon. these soils are usually moist and are dry between depths of 8 and 24 inches for less than 45 consecutive days in the four months that follow the summer solstice. The 10- to 40-inch control section averages 50 to 85 percent rock fragments of which 30 to 65 percent are cobbles and stones. The control section averages less than 10 percent clay and more than 15 percent coarse sand and very coarse sandy. The umbric epipedon is 20 inches or more thick.
The A horizon has chroma of 1 or 2 moist. Rock fragments average 30 to 70 percent of which 15 to 35 percent are cobbles and stones.
The C horizon has value of 3 or 4 moist, 4 through 6 dry, and chroma of 1 through 3 moist and 2 or 3 dry.
COMPETING SERIES: These are the Bigelow, Buell, Goodlow, Henline, Hossick, Hummington McCall, Moohoo, Moran, Tallac, and Wolcott series. Bigelow, Buell, Goodlow, Hossick, McCall, Moohoo, Moran, Tallac, and Wolcott soils are deeper than 40 inches to bedrock. Also, Buell, Goodlow, Hossick, McCall, Moohoo, Moran, Tallac, and Wolcott soils are deeper than 40 inches to bedrock. Also, Buell, Goodlow, Hossick, Hummington, McCall and Moran soils have a cambic horizon; Buell, McCall and Tallac soils are dry more than 45 consecutive days during the four-month period following summer solstice; Goodlow, Moohoo, and Moran soils have an umbric epipedon thinner than 20 inches, the Goodlow soils also have a clay loam B horizon. Henline soils overlie basalt and have less than 15 percent coarse sand and very coarse sand. Hummington and Moohoo soils also are medium textured.
GEOGRAPHIC SETTING: Crannler soils are on mountain sideslopes and ridgetops and are at elevations of 5,500 to 7,000 feet. Slopes range from 50 to 90 percent. The soils formed in colluvium and residuum weathered from granitic rock. Mean annual temperature is 38 degrees to 45 degrees F., and the mean annual precipitation ranges from 60 to 80 inches. The frost-free period is less than 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Althouse, Bigelow, Goodwin, Jayar, Rogue, Skymor, and Woodseye soils. Althouse, Rogue and Skymor soils lack an umbric epipedon. Goodwin soils are 40 to 60 inches deep to a paralithic contact. Jayar soils are 20 to 40 inches to bedrock. Woodseye soils are 12 to 20 inches deep to a lithic contact.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Crannler soils are used for timber production, grazing, wildlife habitat, water supply and recreation. Natural vegetation is white fir, shasta red fir, mountain hemlock, wild rose, gooseberry, snowbrush, greenleaf manzanita, Cascade Oregon grape, deerfoot vanillaleaf, and fescue.
DISTRIBUTION AND EXTENT: Southwestern Oregon. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Josephine County, Oregon, 1979.
REMARKS: Formerly classified as loamy-skeletal, mixed Entic Cryumbrepts, competing series not updated at the time of reclassification.
ADDITIONAL DATA: Characterization data for 1 pedon, 760R-91U(1-3), Forest Service by Oregon State University Soils Laboratory (not published).