LOCATION SAVAGECREEK CA
Established Series
Rev. ACF/JPS/ET/SAA/RLM/KP/
01/2013
SAVAGECREEK SERIES
The Savagecreek series consists of very deep, poorly drained soils formed from volcanic ash and colluvium over marine deposits. Savagecreek soils are on upper, dissected marine terraces and have slopes of 0 to 2 percent. The mean annual precipitation is about 1650 millimeters (65 inches) and the mean annual air temperature is about 11 degrees C (52 degrees F).
TAXONOMIC CLASS: Ashy over clayey, glassy over mixed, semiactive, isomesic Aquandic Endoaqualfs
TYPICAL PEDON: Savagecreek ashy silt loam - on a nearly level slope of 1 percent under shore pine, redwood, Pacific rhododendron, California huckleberry, salal, and bracken fern, at 220 meters (840 feet) elevation. (Colors are for moist soil unless otherwise stated. When described on August 15, 2007 the soil was slightly moist to 130 centimeters and wet from 130 to 200 centimeters. Textures are apparent field textures.)
Oi--0 to 5 centimeters (0 to 2 inches); black (10YR 2/1) slightly decomposed needles, leaves and twigs, very dark grayish brown (10YR 3/2) dry; 100 percent unrubbed, 98 percent rubbed; loose, loose, nonsticky and nonplastic; many very fine and fine and common medium and coarse roots; many very fine and common fine interstitial pores; very strongly acid (pH 5.0); clear wavy boundary. (0 to 15 centimeters thick)
E--5 to 19 centimeters (2 to 8 inches); dark gray (10YR 4/1) ashy silt loam, light gray (10YR 7/1) dry; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and moderately plastic; common very fine, fine, and medium roots; common very fine and fine irregular pores; very strongly acid (pH 4.8); clear wavy boundary. (5 to 23 centimeters thick)
Eg--19 to 37 centimeters (8 to 15 inches); gray (10YR 6/1) ashy silt loam, white (10YR 8/1) dry; weak medium subangular blocky structure; moderately hard, firm, moderately sticky and moderately plastic; moderately few medium and common very fine and fine roots; common very fine and fine irregular pores; many prominent, fine strong brown (7.5YR 5/8) masses of iron accumulation in the matrix; very strongly acid (pH 4.6); clear wavy boundary. (15 to 25 centimeters thick)
Btg1--37 to 55 centimeters (15 to 22 inches); gray (10YR 6/1) silty clay loam, light gray (10YR 7/1) dry; weak medium subangular blocky structure; hard, very firm, moderately sticky and very plastic; moderately few medium and fine roots; common very fine and fine irregular pores; very few distinct clay films on faces of peds; many, prominent, fine strong brown (7.5YR 5/8) masses of iron accumulation in the matrix and along root channels; very strongly acid (pH 4.8); gradual smooth boundary.
Btg2--55 to 71 centimeters (22 to 28 inches); gray (10YR 5/1) silty clay loam, light gray (10YR 7/1) dry; moderate medium subangular blocky structure parting to moderate fine subangular blocky structure; hard, very firm, moderately sticky and very plastic; very few very fine and moderately few fine roots; common very fine and fine irregular pores; very few distinct clay films on faces of peds; many, prominent, fine strong brown (7.5YR 5/8) and yellowish red (5YR 5/8) masses of iron accumulation in the matrix and along root channels; very strongly acid (pH 4.9); clear wavy boundary.
Btg3--71 to 92 centimeters (28 to 36 inches); gray (10YR 6/1) clay loam, white (10YR 8/1) dry; weak medium and coarse subangular blocky structure; hard, very firm, moderately sticky and very plastic; very few very fine and fine roots; common very fine and fine irregular pores; very few distinct clay films on faces of peds; many, prominent, fine strong brown (7.5YR 5/8) and yellowish red (5YR 5/8) masses of iron accumulation in the matrix and along root channels; very strongly acid (pH 5.0); clear wavy boundary. (Combined thickness of the Bg horizons is 50 to 200 centimeters)
2Bg1--92 to 130 centimeters (36 to 51 inches); light gray (10YR 7/1) clay loam, white (10YR 8/1) dry; weak medium subangular blocky structure; hard, very firm, moderately sticky and very plastic; very few very fine and fine roots; many, prominent, fine strong brown (7.5YR 5/8) and strong brown (7.5YR 5/6) masses of iron accumulation in the matrix and along root channels; 2 percent gravel; slightly acid (pH 6.3); clear wavy boundary.
2Bg2--130 to 180 centimeters (51 to 71 inches); gray (10YR 5/1) dry stratified layers of silty clay loam and fine sandy loam, light gray (10YR 7/1); massive; hard, very firm, moderately sticky and very plastic; many, prominent, fine strong brown (7.5YR 5/8) masses of iron accumulation in the matrix; 1 percent gravel; moderately acid (pH 6.0); abrupt wavy boundary. (Combined thickness of the 2Bg horizons is 0 to 100 centimeters)
3Cg--180 to 200 centimeters (71 to 79 inches); light bluish gray (10B 8/1) fine sandy loam, white (N 8/ ) dry; massive; hard, very firm, slightly sticky and slightly plastic; few, prominent, fine strong brown (7.5YR 5/6) masses of iron accumulation in the matrix and fine light greenish gray(10BG 7/1) iron depletions in the matrix; 1 percent small gravel; slightly acid (pH 6.4). (Combined thickness of the 2Cg horizon is 0 to 50 centimeters)
TYPE LOCATION: Humboldt County, California; northwest quarter, northwest quarter, Section 13, T.8N. R.1W. 41 degrees, 5 minutes, 11.7 seconds north latitude and 124 degrees, 7 minutes, 28.5 seconds west longitude; HBLM, USGS Crannell Quadrangle; UTM Zone 10 405543mE 4548977mN; NAD83.
RANGE IN CHARACTERISTICS:
Soil Moisture: Moist in all parts of the soil moisture control section between the depths of 10 to 30 centimeters (4 to 12 inches) in most years and saturated in some parts during the months of December through April. The soils have an aquic moisture regime.
Soil temperature: The mean annual soil temperature is 10 to 13 degrees C (50 to 55 degrees F). The difference between mean summer and mean winter temperature is 2 to 4 degrees C. The soils have an isomesic temperature regime.
Depth to redoximorphic features: 10 to 25 centimeters (4 to 10 inches)
The albic horizon is 10 to 35 centimeters thick.
Particle-Size Control Section (weighted average):
Rock fragments: 0 to 10 percent gravel and 0 to 25 percent paragravel.
Clay content: 35 to 45 percent clay.
O horizon
Hue: 10YR.
Value: 2 through 6 dry and moist.
Chroma: 1 through 4 dry and moist.
Texture: slightly decomposed organic material.
Wood fragments: 0 to 35 percent.
Reaction: moderately to very strongly acid.
E horizon
Hue: 10YR.
Value: 5 through 8 dry, 3 through 5 moist.
Chroma: 1 or 2 dry or moist.
Texture of fine earth: ashy silt loam.
Clay content: 10 to 25 percent.
Reaction: strongly or very strongly acid.
Eg horizon
Hue: 10YR.
Value: 6 through 8 dry, 4 through 6 moist.
Chroma: 1 through 2 dry or moist.
Texture of fine earth: silt loam.
Clay content: 20 to 26 percent.
Reaction: strongly or very strongly acid.
Redoximorphic features: fine iron-manganese masses in the matrix, iron stains lining root channels and/or pores
Quantity: few to many
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 4 through 8
Btg horizon
Hue: 7.5YR, 10YR or 2.5Y.
Value: 6 through 8 dry, 5 or 6 moist.
Chroma: 1 through 4 dry or moist.
Texture of fine earth: silty clay loam or clay loam.
Rock fragments: 0 to 10 percent gravel; 0 to 45 percent paragravels.
Clay content: 35 to 40 percent.
Reaction: strongly or very strongly acid.
Redoximorphic features: fine iron-manganese masses in the matrix, iron stains lining root channels and/or pores
Quantity: few to many
Hue: 5YR, 7.5YR or 10YR
Value: 5 to 6
Chroma: 4 through 8
Redoximorphic features: fine and medium iron depletions in matrix
Quantity: few to many
Hue: 10YR or 2.5Y
Value: 3 to 5
Chroma: 1 to 3
2Bg horizon
Hue: 10YR.
Value: 5 through 8 dry, 5 through 7 moist.
Chroma: 1 through 4 dry or moist.
Texture of fine earth: silt loam, silty clay loam, or clay loam.
Rock fragments: 0 to 5 percent gravel; 0 to 5 percent paragravels.
Clay content: 25 to 40 percent.
Reaction: moderately acid to neutral.
Redoximorphic features: fine or medium iron-manganese masses in the matrix, iron stains lining root channels and and/or pores
Quantity: common to many
Hue: 7.5YR or 10YR
Value: 5 to 6
Chroma: 4 through 8
Redoximorphic features: fine and medium iron depletions in matrix
Quantity: common to many
Hue: 10YR or 2.5Y
Value: 6 to 8
Chroma: 1 to 3
3Cg horizon
Hue: N, 10BG or 5Y.
Value: 7 or 8 dry, 5 through 8 moist.
Chroma: / through 3 dry or moist.
Texture of fine earth: fine sandy loam
Rock fragments: 0 to 5 percent gravel; 0 to 5 percent paragravels.
Clay content: 10 to 20 percent.
Reaction: slightly acid to neutral.
Redoximorphic features: fine iron-manganese masses in the matrix, iron stains lining root channels and/or pores
Quantity: few to common
Hue: 7.5YR or 10YR
Value: 5 to 6
Chroma: 5 through 8
COMPETING SERIES: At this time there no other series in this family.
GEOGRAPHIC SETTING: These soils are on upper, dissected marine terraces, and have slopes of 0 to 2 percent. Elevations are 158 to 244 meters (520 to 800 feet). These soils form in volcanic ash and hillslope colluvium over marine deposits. The climate is humid with cool, foggy summers and cool, rainy winters. Mean annual precipitation is 1520 to 1800 millimeters (60 to 70 inches). Mean January temperature is about 8 degrees C; mean July temperature is about 13 degree C; and the mean annual temperature is 10 to 13 degrees C (50 to 55 degrees F). Frost free season is about 260 to 325 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Burriscreek soils. Burriscreek soils are well drained without redoximorphic features. Burriscreek soils are found on linear to slightly convex, gently sloping shoulder and summit positions generally below the Savagecreek soils.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: poorly drained; very high runoff; moderately low saturated hydraulic conductivity.
USE AND VEGETATION: This soil has been used for commercial timber and is used for wildlife recreation, and watershed. Natural vegetation consists of shore pine, redwood, Douglas-fir, California huckleberry, salal, bracken fern, and deer fern.
DISTRIBUTION AND EXTENT: Coastal Redwood Belt; MLRA 4B. The series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Humboldt County, California, 2012. Proposed 2007. The source of the name is from Savage Creek, a small stream south of Candy Mountain.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
1. Ochric epipedon - the zone from 0 to 18 centimeters (Oi and E horizons).
2. Albic horizon - the zone from 5 to 37 centimeters (E and Eg horizons).
3. Argillic horizon - the zone from 37 to 92 centimeters (Btg1, Btg2, and Btg3 horizons).
4. Particle-size control section - the zone from 37 to 87 centimeters, averages 44 percent clay.
5. Aqualfs feature - aquic conditions for some time in normal years, and within 50 centimeters from surface on faces of peds and matrix 50 percent or more chroma 2 or less and redox concentrations.
6. Andic Soil Properties - the zone from 37 to 71 centimeters (Btg1 and Btg2).
ADDITIONAL DATA:
NSSL, Lincoln Lab sample 08N0241
NASIS User Pedon ID 07CA605114
Soil classified using the 11th Edition of the Keys to Soil Taxonomy.
National Cooperative Soil Survey
U.S.A.