IDENTIFIERS

Current Taxon Name (Soil Name): Tannin

OSD

Series Extent

User Site ID: S2004CA023014

User Pedon ID: S2004CA023014

Vegetation Plot ID: S2004CA023014

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 05N0136

NCSS Pedon Lab Data NASIS Record ID - 18229

Print Date: 5/4/2025

LOCATION

Location In Web Soil Survey

AOI is roughly a square mile and pedon is marked in the center.

Location in SoilWeb

Location in Google Maps

Std. Latitude: 40.2647209

Std. Longitude: -124.2491684

Datum: WGS84

Township: 2S

Range: 2W

Section: 25

State: California

County: CA023—Humboldt

MLRA: 5—Siskiyou-Trinity Area

Non-MLRA Soil Survey Area: CA601—Humboldt County, South Part, California

7.5 Minute USGS Quad: 40124-C2—Buckeye Mountain, California

PEDON

Describers Name: Jennifer T. Berman

Current Taxonomic Class: Fine-loamy, mixed, superactive, mesic Ultic Palexeralfs

Current Taxon Kind: series

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 14

Sampled As Information:

Soil Name - Tannin

Taxonomic Class - Fine-loamy, mixed, superactive, mesic Ultic Palexeralfs

PSC - 42 to 92 cm.

Classificaton Date - 8/31/2004

Soil Taxonomic Edition - ninth edition

Moisture Class - udic

Moisture SUBClass - typic

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: colluvium derived from sandstone

Landform: mountain slope

Geomorphic Component Mountains: mountainflank, center third

Hill Slope Profile: backslope

Slope Position: middle third

Slope Complexity: complex

Slope Shape Across: linear

Slope Shape Down: linear

Runoff: very high

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Geology: Co2 Melange member of the Coastal Terrane formation in the Franciscan Complex group.

Surface Fragments: 5.00 percent nonflat subangular indurated 2- to 75-millimeter sandstone, unspecified, 1.00 percent nonflat subangular indurated 75- to 250-millimeter sandstone, unspecified,

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 8/31/2004 (actual site observation date)

Air Photo ID: 6247-128

Surface Water Kind: none observed

Plant Association Name: Douglas fir-tanoak

Surface Cover Properties:

Site Obs. Cover Kind 1 - tree cover

Site Obs. Cover Kind 2 - intermixed conifers and hardwoods

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
ALRU2 ARME FRAGA HODI LIDE3 MANE2 OXOR POMU PSME RUDI2 VAOV2	Alnus rubra Arbutus menziesii Fragaria Holodiscus discolor Lithocarpus densiflorus Mahonia nervosa Oxalis oregana Polystichum munitum Pseudotsuga menziesii Rubus discolor Vaccinium ovatum	red alder Pacific madrone strawberry oceanspray tanoak Cascade barberry redwood-sorrel western swordfern Douglas-fir Himalayan blackberry California huckleberry	— — — — — — — — — — —	— — — — — — — — — — —	— — — — — — — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon argillic horizon	0—23 42—180	—23— —138—

Setting and Climate
Slope	Slope Length USLE	Upslope Length	Elev.	Corr. Elev	Aspect	MAP	REAP	FFD	MAAT	MSAT	MWAT	MAST	MSST	MWST	MFFP	PE Index	Climate Station ID	Climate Station Name	Climate Station Type
%	m				degrees	mm	mm		C						mm
60	—	—	305	—	345	2160	—	—	—	—	—	—	—	—	—	—	—	—	—

Oi—0 to 3 centimeters (0.0 to 1.2 inches); slightly decomposed plant material; fragments; abrupt wavy boundary.; dry when described; observed in cut

A—3 to 23 centimeters (1.2 to 9.1 inches); brown (10YR 5/3) rubbed, very dark brown (10YR 2/2) rubbed, moist; gravelly loam; 24 percent clay; moderate fine granular, and moderate very fine granular structure; soft, very friable, slightly sticky, slightly plastic; 5.0 very fine roots throughout and 3.0 medium roots throughout and 0.5 fine roots throughout; 3.0 medium tubular and 0.5 fine tubular pores; 30 percent by volume nonflat subangular indurated 2-25-75 millimeter sandstone, unspecified fragments; moderately acid, pH 5.6, chlorophenol red; clear wavy boundary.; dry when described; observed in cut

AB—23 to 42 centimeters (9.1 to 16.5 inches); yellowish brown (10YR 5/4) rubbed, dark yellowish brown (10YR 3/4) rubbed, moist; gravelly loam; 27 percent clay; moderate very fine granular, and moderate fine granular structure; soft, very friable, slightly sticky, slightly plastic; 20.0 very fine roots throughout and 1.0 medium roots throughout and 1.0 fine roots throughout and 1.0 coarse roots throughout; 1.0 medium tubular and 0.5 fine tubular pores; 20 percent distinct clay films on rock fragments; 30 percent by volume nonflat subangular indurated 2-25-75 millimeter sandstone, unspecified fragments; strongly acid, pH 5.4, chlorophenol red; clear wavy boundary.; dry when described; observed in cut

Bt1—42 to 77 centimeters (16.5 to 30.3 inches); pale brown (10YR 6/3) broken face, brown (10YR 4/3) broken face, moist; gravelly clay loam; 31 percent clay; moderate medium subangular blocky, and moderate fine subangular blocky structure; slightly hard, very friable, slightly sticky, moderately plastic; 10.0 very fine roots throughout and 2.0 very coarse roots throughout and 10.0 medium roots throughout and 0.5 fine roots throughout and 2.0 coarse roots throughout; 1.0 medium tubular and 1.0 fine tubular pores; 5 percent faint clay films on rock fragments and 5 percent faint clay films on all faces of peds; 25 percent by volume nonflat subangular indurated 2-25-75 millimeter sandstone, unspecified fragments; strongly acid, pH 5.4, chlorophenol red; clear wavy boundary.; dry when described; observed in cut

Bt2—77 to 117 centimeters (30.3 to 46.1 inches); light yellowish brown (2.5Y 6/3) broken face, olive brown (2.5Y 4/3) broken face, moist; gravelly clay loam; 29 percent clay; moderate very fine subangular blocky structure; slightly hard, very friable, slightly sticky, moderately plastic; 5.0 very fine roots throughout and 1.0 very coarse roots throughout and 10.0 medium roots throughout and 0.5 fine roots throughout; 1.0 very fine tubular and 1.0 medium tubular and 0.5 fine tubular pores; 10 percent faint clay films on all faces of peds; 30 percent by volume nonflat subangular indurated 2-25-75 millimeter sandstone, unspecified fragments; strongly acid, pH 5.4, chlorophenol red; clear wavy boundary.; dry when described; observed in cut

Bt3—117 to 145 centimeters (46.1 to 57.1 inches); light yellowish brown (2.5Y 6/3) broken face, olive brown (2.5Y 4/3) broken face, moist; very gravelly clay loam; 34 percent clay; moderate fine subangular blocky structure; moderately hard, friable, moderately sticky, moderately plastic; 3.0 very fine roots throughout and 3.0 medium roots throughout and 0.5 fine roots throughout and 3.0 coarse roots throughout; 3.0 very fine tubular and 1.0 medium tubular and 0.5 fine tubular pores; 25 percent faint clay films on all faces of peds; 40 percent by volume nonflat subangular indurated 2-25-75 millimeter sandstone, unspecified fragments; strongly acid, pH 5.4, chlorophenol red; clear wavy boundary. Lab sample # 05N00701; dry when described; observed in cut

Bt4—145 to 180 centimeters (57.1 to 70.9 inches); light yellowish brown (2.5Y 6/3) broken face, olive brown (2.5Y 4/3) broken face, moist; very gravelly clay loam; 36 percent clay; moderate fine subangular blocky structure; moderately hard, friable, moderately sticky, moderately plastic; 1.0 very fine roots throughout and 1.0 very coarse roots throughout and 5.0 medium roots throughout and 0.5 fine roots throughout; 3.0 very fine tubular and 1.0 medium tubular and 0.5 fine tubular pores; 30 percent faint dark grayish brown (2.5Y 4/2), moist, clay films on rock fragments; 35 percent by volume nonflat subangular strongly coherent cemented 2-25-75 millimeter mudstone fragments; moderately acid, pH 5.6, chlorophenol red. Lab sample # 05N00702; dry when described; observed in cut