IDENTIFIERS

Current Taxon Name (Soil Name): Seelycreek

OSD

Series Extent

User Site ID: S2007CA601898

User Pedon ID: 07CA601898

Vegetation Plot ID: S2007CA601898

Lab Information:

Certified Lab Pedon Description - yes

Lab Source ID - NSSL

Lab Pedon # - 08N0570

NCSS Pedon Lab Data NASIS Record ID - 20258

Print Date: 4/19/2025

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: 40.1336098

Std. Longitude: -123.8491669

Datum: WGS84

Location Description: Seelycreek Watershed

Map Unit: 304—Seelycreek-Madturkey-Gibsoncreek complex, 30 to 50 percent slopes

State: California

County: CA023—Humboldt

MLRA: 4B—Coastal Redwood Belt

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

7.5 Minute USGS Quad: 40123-B7—Miranda, California

PEDON

Describers Name: Jennifer T. Berman

Current Taxonomic Class: Fine-silty, mixed, superactive, isomesic Ultic Haplustalfs

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 898

Correlated Information:

Soil Name - Seelycreek

PSC - 60 to 110 cm.

Classificaton Date - 5/12/2016

Classifier - Sue Aszman

Soil Taxonomic Edition - tenth edition

Moisture Class - udic

Moisture Subclass - typic

Sampled As Information:

Soil Name - Seelycreek

Classificaton Date - 8/30/2007

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: colluvium derived from siltstone and/or residuum weathered from siltstone

Landscape: mountains

Landform: mountain slope

Geomorphic Component Mountains: mountainflank, lower third

Hill Slope Profile: backslope

Slope Complexity: complex

Slope Shape Across: linear

Slope Shape Down: convex

Runoff: high

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Geology: Marine And Nonmarine Overlap Deposits member of the Quaternary And Tertiary Overlap Deposits group.

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 8/30/2007 (actual site observation date)

Air Photo ID: 6248-26

Plant Association Name: Douglas fir-redwood

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

Site Erosion Accelerated: water erosion sheet

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
LIDE3 LIDE3 PSME PSME SESE3 SESE3 VAOV2 VAOV2	Lithocarpus densiflorus Lithocarpus densiflorus Pseudotsuga menziesii Pseudotsuga menziesii Sequoia sempervirens Sequoia sempervirens Vaccinium ovatum Vaccinium ovatum	tanoak tanoak Douglas-fir Douglas-fir redwood redwood California huckleberry California huckleberry	— — — — — — — —	— — — — — — — —	— — — — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon argillic horizon	0—23 60—200	—23— —140—

Site Soil Temperature
Site Obs. Date	Depth	Sensor Kind	Temperature
	cm		C
8/30/2007	50	—	16

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
72	—	—	168	—	340	1650	—	260	11	—	—	10	—	—	—	—	—	—	—

Oi—0 to 3 centimeters (0.0 to 1.2 inches); very dark gray (10YR 3/1), black (10YR 2/1) rubbed, moist; fragments, chlorophenol red; abrupt wavy boundary.; observed in cut

A—3 to 23 centimeters (1.2 to 9.1 inches); brown (10YR 5/3) crushed, very dark grayish brown (10YR 3/2) crushed, moist; silt loam; 23 percent clay; moderate fine subangular blocky, and moderate very fine subangular blocky structure; moderately hard, friable, moderately sticky, slightly plastic; 1.0 very fine roots throughout and 2.0 medium roots throughout and 0.5 fine roots throughout; 0.5 very fine tubular and 1.0 medium tubular and 0.5 fine tubular and 1.0 coarse tubular pores; 3 percent by volume nonflat subangular weakly coherent cemented 2-25-75 millimeter siltstone, unspecified fragments; noneffervescent; moderately acid, pH 6.0, chlorophenol red; clear wavy boundary.; moderately dry when described; observed in cut

ABt—23 to 60 centimeters (9.1 to 23.6 inches); pale brown (10YR 6/3) broken face, dark brown (10YR 3/3) broken face, moist; silt loam; 25 percent clay; moderate fine subangular blocky structure; moderately hard, friable, moderately sticky, moderately plastic; 1.0 very fine roots throughout and 5.0 medium roots throughout and 1.0 fine roots throughout and 2.0 coarse roots throughout; 2.0 very fine tubular and 1.0 medium tubular and 2.0 fine tubular and 1.0 coarse tubular pores; 5 percent faint clay films on all faces of peds; 3 percent by volume nonflat subangular weakly coherent cemented 2-25-75 millimeter siltstone, unspecified fragments; noneffervescent; moderately acid, pH 5.8, chlorophenol red; clear wavy boundary.; moderately dry when described; observed in cut

Bt1—60 to 98 centimeters (23.6 to 38.6 inches); light yellowish brown (10YR 6/4) broken face, dark yellowish brown (10YR 4/4) broken face, moist; silty clay loam; 30 percent clay; moderate coarse subangular blocky, and moderate medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 1.0 very fine roots throughout and 1.0 very coarse roots throughout and 3.0 medium roots throughout and 0.5 fine roots throughout and 1.0 coarse roots throughout; 2.0 very fine tubular and 3.0 medium tubular and 2.0 fine tubular and 1.0 coarse tubular pores; 30 percent faint clay films on all faces of peds; 3 percent by volume nonflat subangular weakly coherent cemented 2-25-75 millimeter siltstone, unspecified fragments; noneffervescent; moderately acid, pH 5.8, chlorophenol red; gradual wavy boundary.; moderately dry when described; observed in cut

Bt2—98 to 126 centimeters (38.6 to 49.6 inches); light yellowish brown (10YR 6/4) broken face, dark yellowish brown (10YR 4/4) broken face, moist; silty clay loam; 33 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 0.5 very fine roots throughout and 1.0 very coarse roots throughout and 3.0 medium roots throughout and 0.5 fine roots throughout and 1.0 coarse roots throughout; 2.0 very fine tubular and 2.0 medium tubular and 2.0 fine tubular pores; 60 percent distinct clay films on all faces of peds; 3 percent by volume nonflat subangular weakly coherent cemented 2-25-75 millimeter siltstone, unspecified fragments; noneffervescent; moderately acid, pH 5.6, chlorophenol red; clear wavy boundary.; slightly moist when described; observed in cut

Bt3—126 to 170 centimeters (49.6 to 66.9 inches); yellowish brown (10YR 5/4) broken face, dark yellowish brown (10YR 4/4) broken face, moist; silty clay loam; 32 percent clay; 5 percent strong brown (7.5YR 4/6) fine irregular mottles; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 0.5 very fine roots throughout and 0.5 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; 60 percent prominent brown (10YR 4/3), moist, clay films on all faces of peds; 3 percent by volume nonflat subangular weakly coherent cemented 2-25-75 millimeter siltstone, unspecified fragments; noneffervescent; strongly acid, pH 5.4, chlorophenol red; clear wavy boundary.; slightly moist when described; observed in cut

Bt4—170 to 200 centimeters (66.9 to 78.7 inches); yellowish brown (10YR 5/4) broken face, dark yellowish brown (10YR 4/4) broken face, moist; silty clay loam; 32 percent clay; 5 percent dark grayish brown (2.5Y 4/2) fine irregular and 10 percent strong brown (7.5YR 4/6) fine irregular mottles; moderate fine subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 0.5 very fine roots throughout and 0.5 fine roots throughout; 1.0 very fine tubular and 1.0 medium tubular and 0.5 fine tubular pores; 60 percent prominent brown (10YR 4/3), moist, clay films on all faces of peds; 3 percent by volume nonflat subangular weakly coherent cemented 2-25-75 millimeter siltstone, unspecified fragments; noneffervescent; moderately acid, pH 5.6, chlorophenol red.; slightly moist when described; observed in cut