LOCATION FILIORUM CA
Established Series
RLR/GML/RLR
02/2017
FILIORUM SERIES
The Filiorum series consists of deep and very deep, well drained soils that formed in material weathered from calcareous shale. Slopes range from 0 to 20 percent and are on nearly level to moderately sloping marine terraces. The mean annual precipitation is about 340 millimeters and the mean annual temperature is about 17 degrees C.
TAXONOMIC CLASS: Fine, smectitic, thermic Aridic Haploxererts
TYPICAL PEDON: Filiorum clay, on a marine terrace at an elevation of 46 meters. (Colors are for moist soil unless otherwise noted).
A--0 to 12 cm; black (10YR 2/1) clay, very dark gray (10YR 3/1) dry; moderate coarse subangular blocky structure; firm, hard, very sticky and very plastic; common very fine roots; common fine tubular and very fine interstitial pores; finely disseminated calcium carbonate; 2 percent channers; slightly effervescent; slightly alkaline (pH 7.5); abrupt wavy boundary. (7 to 12 cm thick)
Bkss--12 to 80 cm; black (10YR 2/1) clay; strong coarse prismatic structure; firm, very hard, very sticky and very plastic; few very fine roots; common fine tubular pores; few slickensides and many pressure faces on all faces of peds; common medium prominent irregular white (10YR 8/1) calcium carbonate masses in the matrix; 2 percent channers; slightly effervescent; slightly alkaline (pH 7.6); gradual wavy boundary. (60 to 125 cm thick)
Bk1--80 to 150 cm; very dark gray (10YR 3/1) clay; strong coarse prismatic structure; firm, very hard, very sticky and very plastic; common fine tubular pores; many pressure faces on all faces of peds; finely disseminated calcium carbonate and common, medium, prominent, irregular, white (10YR 8/1) calcium carbonate masses in the matrix; slightly effervescent; slightly alkaline (pH 7.6); gradual wavy boundary.
Bk2--150 to 170 cm; dark grayish brown (10YR 4/2) clay loam; moderate coarse subangular blocky structure; firm, very hard, very sticky and very plastic; common pressure faces on all faces of peds; common, medium, prominent, irregular, white (10YR 8/1) calcium carbonate masses in the matrix; slightly effervescent; slightly alkaline (pH 7.6).
TYPE LOCATION: Los Angeles County, California. Open Space at Palos Verdes Estates Shoreline Park, southwest of intersection at Epping St and Paseo Del Mar. 33 degrees, 46 minutes, 40 seconds North latitude and 118 degrees, 25 minutes, 25 seconds West longitude, WGS84 - U.S.G.S Quad: Redondo Beach.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil becomes moist below a depth of about 30 cm some time from October to December and remains moist in some part between depths of about 30 to 90 cm until April or May.
Mean annual soil temperature: 17 to 19 degrees C.
Depth to lithic bedrock: greater than 120 cm, typically deeper than 150 cm.
Rock fragments: 0 to 15 percent throughout
Depth to secondary calcium carbonates: within 10 to 95 cm, distinct to prominent irregular or threadlike masses
Reaction: neutral to moderately alkaline
Linear extensibility: 6 to 9
Clay content: 35 to 55 percent in the particle size control section
Slickensides: found within a depth of 5 to 45 cm or directly below a thin surface mantle of human-transported materials.
Cracks: 1 to 3 cm wide when dry, many cracks are filled in with granular material at the surface.
A horizon
Color: hue of 10YR, value of 2 to 4, chroma of 1 to 3
Texture: clay or clay loam
Clay content: 35 to 55 percent
Bss horizon
color: hue of 10YR, value of 2 or 4, chroma of 1 to 3
Texture: clay or clay loam
Clay content: 35 to 55 percent
Slickensides: intersecting slickensides
Bkss horizon
Color: hue of 10YR, value of 2 to 4, chroma of 1 to 3
Texture: clay or clay loam
Clay content: 35 to 55 percent
Bk, BC horizon
Color: hue of 10YR, value of 2 to 4, chroma of 1 to 4
Texture: clay or clay loam
Clay content: 28 to 50 percent
COMPETING SERIES:
Aido soils: have a paralithic contact at a depth of 50 to 100 cm and cracks that close for less than 90 days.
Alo soils: have a paralithic contact at a depth of 50 to 100 cm.
Altamont soils: are on hills and have a paralithic contact at a depth of 100 to 150 cm.
Auld soils: have a paralithic contact of igneous rock at a depth of 100 to 150 cm.
Bosanko soils: have a paralithic contact of igneous rock at a depth of 50 to 100 cm.
Cibo soils: have a lithic contact of igneous rock at a depth of 50 to 100 cm.
Cropley soils: are on low lying alluvium and on flood plains straddling streams
Diablo soils: have a hue of 5Y and have a paralithic contact at a depth of 100 to 200 cm.
Fiale soils: have a paralithic contact of volcanic rock at a depth of 50 to 100 cm.
Mckeonhills soils: have paralithic contact at a depth of 50 to 100 cm and cracks that close for less than 120 days.
Myers soils: are on alluvial fans and have reaction classes of moderately acid to slightly alkaline and lighter surface colors.
Porterville soils: are on alluvial fans and have hues of 5YR or 7.5YR in the subsoil.
Sehorn soils: have a lithic contact of calcareous sandstone or shale at a depth of 50 to 100 cm.
Vaquero soils: have a paralithic contact at a depth of 50 to 100 cm.
GEOGRAPHIC SETTING:
Landscape: hills and mountains
Landform: marine terraces
Slope: 0 to 20 percent
Climate: warm dry summers and cool moist winter in zone affected by marine layer
Mean annual precipitation: 275to 400 mm
Mean January temperature: 14 degrees C
Mean July temperature: 20 degrees C
Mean annual temperature: 16 to 18 degrees C
Frost free season: 320 to 365 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Apollo soils: have 18 to 35 percent clay and are on hills.
Balcom soils: have a calcic horizon and are on hills.
Centinela soils: have a thin surface of human transported material on old alluvium.
Dapplegray soils: formed in human transported materials on hillslope terraces.
Linne soils: have a paralithic contact at a depth of 50 to 100 cm and are on hills.
Lunada soils: have greater than 35 percent rock fragments and are on hills.
Marina soils: have sandy textures with lamellae and are on coastal sand dunes.
Nacimiento soil: have 18 to 35 percent clay and a paralithic contact at a depth of 50 to 100 cm on hills.
Oceanaire soils: have a calcic horizon and are on hills.
San Benito soils: have 18 to 35 percent clay and are on hills.
Windfetch soils: have 24 to 35 percent clay in the argillic horizon and are on uplifted alluvium and terraces.
Zaca soils: have a paralithic contact at a depth of 100 to 150 cm and are on hills.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; medium to very high runoff; low saturated hydraulic conductivity.
USE AND VEGETATION: Filiorum soils are used for ecological preserves and residential neighborhoods in urban area; rangeland and grain crops in natural or agricultural settings. Vegetation is annual grasses, sagebrush, forbs, oak tree, and various ornamental plants in residential areas.
DISTRIBUTION AND EXTENT: Coastal hills and foot hills of Southern California Mountains; MLRA 20. The series is of small extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Los Angeles County, California, 2015
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from a depth of 0 to 80 cm
Slickensides - the zone from a depth of 12 to 80 cm
Secondary calcium carbonates - the zone from a depth of 12 to 170 cm
Particle-size control section - the zone from a depth of 25 to 100 cm
A few pedons that do not have calcium carbonate were included in this concept. It is an uncommon condition.
ADDITIONAL DATA:
NASIS User Site ID: 2015CA6961294
Classified using the Twelfth Edition Keys to Soil Taxonomy (2014)
National Cooperative Soil Survey
U.S.A.