IDENTIFIERS

Current Taxon Name (Soil Name): Dolason

OSD

Series Extent

User Site ID: 06CA600154

User Pedon ID: 06CA600154

Vegetation Plot ID: 06CA600154

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - NSSL

Lab Pedon # - 07N0348

NCSS Pedon Lab Data NASIS Record ID - 19041

Print Date: 4/28/2025

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: 40.3812944

Std. Longitude: -124.1957361

Datum: WGS84

Location Description: Long Ridge

Map Unit: 4408—Dolason-Forhaux-Peaked complex, 5 to 30 percent slopes

State: California

County: CA023—Humboldt

MLRA: 4—California Coastal Redwood Belt

Non-MLRA Soil Survey Area: CA600—Humboldt County, Central Part, California

7.5 Minute USGS Quad: 40124-D2—Taylor Peak, California

PEDON

Describers Name: Kylee Bennett and Sue Aszman

Current Taxonomic Class: Fine-loamy, mixed, superactive, mesic Pachic Humixerepts

Current Taxon Kind: series

Pedon Type: classifies to current taxon name, full description

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Correlated Information:

Soil Name - Dolason

PSC - 25 to 100 cm.

Classificaton Date - 3/29/2013

Classifier - Jonathan Hooper

Soil Taxonomic Edition - eleventh edition

Moisture Class - xeric

Moisture Subclass - typic

Sampled As Information:

Soil Name - Pigtoe

Classificaton Date - 6/19/2006

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: eolian deposits derived from sedimentary rock and/or residuum weathered from sedimentary rock and/or residuum weathered from mudstone

Landscape: mountains

Landform: ridge

Geomorphic Component Mountains: mountaintop

Hill Slope Profile: summit

Slope Complexity: complex

Slope Shape Across: convex

Slope Shape Down: linear

Runoff: high

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Bedrock: strongly coherent mudstone with <10

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

Surface Fragments: 20.00 percent nonflat subrounded strongly coherent cemented 2- to 76-millimeter mudstone,

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 6/19/2006 (actual site observation date)

Air Photo ID: 6247-132

Surface Water Kind: none observed

Plant Association Name: Grasses, forbs, some Douglas-fir invadin

Surface Cover Properties:

Site Obs. Cover Kind 1 - grass/herbaceous cover

Site Obs. Cover Kind 2 - rangeland, grassland

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
CYNOS2 HOLCU PSME PTAQ 2GA 2GP	Cynosurus Holcus Pseudotsuga menziesii Pteridium aquilinum — —	dogstail grass velvetgrass Douglas-fir western brackenfern Grass, annual Grass, perennial	— — — — — —	— — — — — —	— — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
umbric epipedon cambic horizon	0—70 70—150	—70— —80—

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
27	—	—	596	—	310	1520	—	285	11	—	—	—	—	—	—	—	—	—	—

A1—0 to 22 centimeters (0.0 to 8.7 inches); dark grayish brown (10YR 4/2) broken face, black (10YR 2/1) broken face, moist; gravelly sandy clay loam; 24 percent clay; weak fine granular structure; soft, very friable, slightly sticky, nonplastic; moderate permeability; low excavation difficulty; 10.0 very fine roots throughout and 6.0 fine roots throughout; 4.0 fine tubular and 4.0 fine irregular pores; 20 percent by volume nonflat subrounded strongly coherent cemented 2-20-75 millimeter mudstone fragments; moderately acid, pH 5.6, pH meter; gradual wavy boundary.; dry when described; observed in cut

A2—22 to 53 centimeters (8.7 to 20.9 inches); dark grayish brown (10YR 4/2) broken face, black (10YR 2/1) broken face, moist; loam; 26 percent clay; moderate medium subangular blocky parts to moderate fine granular structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; low excavation difficulty; 7.0 very fine roots throughout and 3.0 fine roots throughout; 4.0 very fine irregular and 4.0 medium tubular and 4.0 fine tubular pores; 8 percent by volume nonflat subrounded strongly coherent cemented 2-20-75 millimeter mudstone fragments; strongly acid, pH 5.5, pH meter; gradual wavy boundary.; dry when described; observed in cut

A3—53 to 70 centimeters (20.9 to 27.6 inches); grayish brown (10YR 5/2) broken face, very dark grayish brown (10YR 3/2) broken face, moist; gravelly sandy clay loam; 23 percent clay; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; moderate excavation difficulty; 5.0 very fine roots throughout and 2.0 very coarse roots throughout and 2.0 fine roots throughout; 4.0 very fine irregular and 4.0 fine tubular pores; 15 percent by volume nonflat subrounded strongly coherent cemented 2-20-75 millimeter mudstone fragments; strongly acid, pH 5.5, pH meter; gradual wavy boundary.; dry when described; observed in cut

Bw1—70 to 120 centimeters (27.6 to 47.2 inches); pale brown (10YR 6/3) broken face, brown (10YR 4/3) broken face, moist; gravelly sandy clay loam; 25 percent clay; weak fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; moderate permeability; moderate excavation difficulty; 3.0 very fine roots throughout and 7.0 coarse roots throughout; 0.5 very fine irregular and 0.5 fine tubular pores; 2 percent by volume nonflat subangular strongly coherent cemented 75-150-250 millimeter mudstone fragments and 30 percent by volume nonflat subangular strongly coherent cemented 2-5-75 millimeter mudstone fragments; strongly acid, pH 5.4, pH meter; gradual wavy boundary.; dry when described; observed in cut

Bw2—120 to 150 centimeters (47.2 to 59.1 inches); pale yellow (2.5Y 7/3) broken face, light olive brown (2.5Y 5/3) broken face, moist; very gravelly sandy clay loam; 28 percent clay; weak fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; moderate permeability; moderate excavation difficulty; 3.0 very fine roots throughout and 1.0 medium roots throughout and 1.0 fine roots throughout and 3.0 coarse roots throughout; 0.5 very fine tubular and 0.5 very fine irregular pores; 55 percent by volume nonflat subangular strongly coherent cemented 2-20-75 millimeter mudstone fragments; moderately acid, pH 5.6, pH meter; gradual wavy boundary.; dry when described; observed in cut

2BC—150 to 200 centimeters (59.1 to 78.7 inches); pale yellow (2.5Y 7/3) broken face, light olive brown (2.5Y 5/3) broken face, moist; extremely gravelly sandy clay loam; 26 percent clay; structureless massive; loose, loose, slightly sticky, slightly plastic; moderate permeability; very high excavation difficulty; 2.0 very fine roots throughout and 1.0 fine roots throughout; 0.5 very fine low-continuity interstitial pores; 3 percent by volume nonflat subangular strongly coherent cemented 75-150-250 millimeter mudstone fragments and 60 percent by volume nonflat subangular strongly coherent cemented 2-20-75 millimeter mudstone fragments; moderately acid, pH 5.6, pH meter.; dry when described; observed in cut