IDENTIFIERS

Current Taxon Name (Soil Name): Cortina

OSD

Series Extent

User Site ID: S2016CA021001

User Pedon ID: S2016CA021001

Vegetation Plot ID: S2016CA021001

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - KSSL

Lab Pedon # - 17N0582

User Project ID: 53036

Project Name: MLRA 17 - Bay-Delta Soil Systems Study

Print Date: 2/17/2026

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: 39.7800278

Std. Longitude: -122.2603889

Datum: WGS84

Map Unit: Czk—Cortina gravelly fine sandy loam, shallow

State: California

County: CA021—Glenn

MLRA: 17—Sacramento and San Joaquin Valleys

Regional Office: SW—Southwest

MLRA Soil Survey Area: SW-CHI—Chico, California

Non-MLRA Soil Survey Area: CA021—Glenn County, California

PEDON

Describers Name: Andrew Conlin

Current Taxonomic Class: Loamy-skeletal, mixed, superactive, nonacid, thermic Typic Xerorthents

Current Taxon Kind: taxadjunct

Pedon Type: taxadjunct to the series

Pedon Purpose: laboratory sampling site

Pedon Record Orgin: NASIS

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: overbank alluvium derived from metamorphic and sedimentary rock over channel alluvium derived from metamorphic and sedimentary rock

Landscape: valley

Landform: flood-plain step on alluvial fan

Microfeature: bar

Geomorphic Component Terraces: tread

Drainage Class: well

Flooding: rare flooding for brief periods begining in dec

Ponding: none ponding

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 2/24/2016 (actual site observation date)

Data Collector: Ryan Miebach, Andrew Conlin

Surface Cover Properties:

Site Obs. Cover Kind 1 - grass/herbaceous cover

Site Obs. Cover Kind 2 - pastureland, tame

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
BRODI DACTY ERODI FESTU LUPIN PLANT TRIFO	Brodiaea Dactylis Erodium Festuca Lupinus Plantago Trifolium	brodiaea orchardgrass stork's bill fescue lupine plantain clover	— — — — — — —	— — — — — — —	— — — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon	0—15	—15—

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
0.5	—	—	91	—	124	558	—	—	16.6	—	—	—	—	—	—	—	—	—	—

Ap1—0 to 5 centimeters (0.0 to 2.0 inches); very dark grayish brown (2.5Y 3/2), light brownish gray (2.5Y 6/2), dry; fine sandy loam; 5 percent clay; moderate medium granular structure; soft, very friable, nonsticky, nonplastic; many very fine roots; many very fine irregular and many very fine tubular pores; 5 percent by volume nonflat subangular indurated 2-5-15 millimeter metamorphic, unspecified fragments observed by visual inspection method; noneffervescent, by hcl, 1n; slightly acid, pH 6.5, hellige-truog; abrupt smooth boundary. Lab sample # 17N02998; slightly moist when described; observed in trench

Ap2—5 to 15 centimeters (2.0 to 5.9 inches); dark grayish brown (2.5Y 4/2), light brownish gray (2.5Y 6/2), dry; fine sandy loam; 6 percent clay; moderate very thick platy parts to weak coarse subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; common very fine roots; common very fine tubular pores; 5 percent by volume nonflat subangular indurated 2-5-15 millimeter metamorphic, unspecified fragments observed by visual inspection method; noneffervescent, by hcl, 1n; neutral, pH 6.6, hellige-truog; clear smooth boundary. Lab sample # 17N02999; slightly moist when described; observed in trench

AC—15 to 26 centimeters (5.9 to 10.2 inches); dark grayish brown (2.5Y 4/2), light brownish gray (2.5Y 6/2), dry; fine sandy loam; 7 percent clay; weak medium subangular blocky parts to structureless single grain; slightly hard, very friable, nonsticky, nonplastic; common very fine roots; common very fine tubular pores; 10 percent by volume nonflat subangular indurated 2-5-15 millimeter metamorphic, unspecified fragments observed by visual inspection method; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog; clear smooth boundary. Lab sample # 17N03000; slightly moist when described; observed in trench

C1—26 to 51 centimeters (10.2 to 20.1 inches); dark grayish brown (2.5Y 4/2), light brownish gray (2.5Y 6/2), dry; sandy loam; 6 percent clay; structureless single grain; loose, loose, nonsticky, nonplastic; few very fine roots; common very fine tubular pores; 10 percent by volume nonflat subangular indurated 2-5-20 millimeter metamorphic, unspecified fragments observed by visual inspection method; noneffervescent, by hcl, 1n; neutral, pH 6.8, hellige-truog; abrupt wavy boundary. Lab sample # 17N03001; slightly moist when described; observed in trench

C2—51 to 112 centimeters (20.1 to 44.1 inches); dark grayish brown (2.5Y 4/2), light brownish gray (2.5Y 6/2), dry; extremely gravelly loamy sand; 2 percent clay; structureless single grain; loose, loose, nonsticky, nonplastic; few very fine roots; many very fine interstitial and many medium interstitial and many fine interstitial pores; 70 percent by volume nonflat subrounded indurated 2-10-50 millimeter metamorphic, unspecified fragments observed by visual inspection method; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.6, hellige-truog; abrupt smooth boundary. Lab sample # 17N03002; slightly moist when described; observed in trench

C3—112 to 122 centimeters (44.1 to 48.0 inches); dark grayish brown (2.5Y 4/2), light brownish gray (2.5Y 6/2), dry; fine sandy loam; 7 percent clay; structureless massive; loose, loose, nonsticky, nonplastic; few very fine roots; common very fine tubular pores; 10 percent medium distinct irregular noncoherent cemented masses of oxidized iron with diffuse boundaries; 2 percent by volume nonflat subangular indurated 2-5-15 millimeter metamorphic, unspecified fragments observed by visual inspection method; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog; abrupt smooth boundary. Lab sample # 17N03003; moist when described; observed in trench

C4—122 to 147 centimeters (48.0 to 57.9 inches); dark gray (2.5Y 4/1), gray (2.5Y 6/1), dry; very gravelly loamy coarse sand; 1 percent clay; structureless single grain; loose, loose, nonsticky, nonplastic; 0.0 roots; many very fine interstitial and common fine interstitial pores; 45 percent by volume nonflat subrounded indurated 2-5-60 millimeter metamorphic, unspecified fragments observed by visual inspection method; noneffervescent, by hcl, 1n; neutral, pH 7.2, hellige-truog; clear smooth boundary. Lab sample # 17N03004; moist when described; observed in trench

C5—147 to 180 centimeters (57.9 to 70.9 inches); dark gray (2.5Y 4/1), light gray (2.5Y 7/1), dry; extremely gravelly coarse sand; structureless single grain; loose, loose, nonsticky, nonplastic; 0.0 roots; many very fine interstitial and many medium interstitial and many fine interstitial pores; 10 percent by volume nonflat subrounded indurated 75-100-250 millimeter metamorphic, unspecified fragments observed by visual inspection method and 65 percent by volume nonflat subrounded indurated 2-5-70 millimeter metamorphic, unspecified fragments observed by visual inspection method; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.5, hellige-truog. Lab sample # 17N03005; moist when described; observed in trench