Illinois Geologic Quadrangle MapIGQ Paderborn-SG

Base map compiled by Illinois State Geological Survey from digital data (Raster Feature Separates) provided by the United States Geological Survey. Topography by photogram-metric methods from aerial photographs taken 1986. Field checked 1989. Map edited 1990.

North American Datum of 1927 (NAD 27)Projection: Transverse Mercator10,000-foot ticks: Illinois State Plane Coordinate system, west zone (Transverse Mercator)1,000-meter ticks: Universal Transverse Mercator grid system, zone 15

Recommended citation:Phillips, A.C., 2010, Surficial Geology of Paderborn Quadrangle, Monroe and St. Clair

Counties, Illinois: Illinois State Geological Survey, Illinois Geologic Quadrangle Map, IGQ Paderborn-SG, 2 sheets, 1:24,000, report, 7 p.

Geology based on field work by Andrew C. Phillips and Timothy O. Hodson, 2008–2009.

Digital cartography by Jennifer E. Carrell and Jane E.J. Domier, Illinois State Geological Survey.

This research was supported in part by the U.S. Geological Survey National Cooperative Geologic Mapping Program (STATEMAP) under USGS award number 08HQAG0084. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government.

The Illinois State Geological Survey and the University of Illinois make no guarantee, expressed or implied, regarding the correctness of the interpretations presented in this document and accept no liability for the consequences of decisions made by others on the basis of the information presented here. The geologic interpretations are based on data that may vary with respect to accuracy of geographic location, the type and quantity of data available at each location, and the scientific and technical qualifications of the data sources. Maps or cross sections in this document are not meant to be enlarged.

IGQ Paderborn-SG Sheet 1 of 2

SURFICIAL GEOLOGY OF PADERBORN QUADRANGLEMONROE AND ST. CLAIR COUNTIES, ILLINOIS

Andrew C. Phillips2010

1°

APPROXIMATE MEANDECLINATION, 2010

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ROAD CLASSIFICATION

Primary highway,hard surface

Secondary highway,hard surface

Light-duty road, hard orimproved surface

Unimproved road

State Route

ADJOINING QUADRANGLES1 Columbia2 Millstadt3 Freeburg4 Waterloo5 New Athens West6 Renault7 Ames8 Red Bud

BASE MAP CONTOUR INTERVAL 10 FEET

NATIONAL GEODETIC VERTICAL DATUM OF 1929

1 2 3

4 5

6 7 8

© 2010 University of Illinois Board of Trustees. All rights reserved.For permission information, contact the Illinois State Geological Survey.

7000 FEET1000 10000 2000 3000 4000 5000 6000

.5 1 KILOMETER1 0

SCALE 1:24,0001/ 21 0 1 MILE

Institute of Natural Resource SustainabilityWilliam W. Shilts, Executive Director

ILLINOIS STATE GEOLOGICAL SURVEYE. Donald McKay III, Director

For more information contact: Institute of Natural Resource Sustainability Illinois State Geological Survey 615 East Peabody Drive

Champaign, Illinois 61820-6964 (217) 244-2414 http://www.isgs.illinois.edu

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QUATERNARY DEPOSITSUnit

HUDSON EPISODE (~12,000 years before present (B.P.) to today)

Surface Mines

Disturbed Ground(cross sections only)

Cahokia Formation

WISCONSIN EPISODE (~75,000 years–12,000 B.P.)

Peoria and Roxana Silts

Equality Formation

buried by >5 feet alluvium

ILLINOIS EPISODE (~200,000 years–130,000 B.P.)

Teneriffe Silt

(hatch lines where buried)

Glasford Formation

Petersburg Silt(cross sections only)

PRE-ILLINOIS EPISODE (~700,000–400,000 years B.P.)

Banner Formation,Omphghent member

(cross sections only)

Banner Formation,Harkness Silt Member

(cross sections only)

Banner Formation,Canteen member(cross sections only)

PRE-QUATERNARY DEPOSITS

PALEOZOIC BEDROCK

Unit

Near-surface bedrock

Interpretation

Excavations; active bedrock mining occurs along the Waterloo-Dupo Anticline in the southeast quadrant; the Hecker mine in the east is inactive

Fill; roadbeds raised across floodplains

Stream sediment deposited in floodplains; mainly redeposited loess but including reworked local bedrock and till in lower portions; 10 to 25 feet thick in Prairie du Long valley, generally less than 10 feet thick in its tributaries

Loess, but including some slope deposits; upper and thicker portion is Peoria Silt (yellow brown to gray); lower portion is Roxana Silt (brown with pink hue to gray); thins from west to east; lies directly on bedrock on local bedrock highs in west

Backwater lake sediment deposited when mouth of Kaskaskia River was blocked by aggradation in Mississippi valley, forming lakes in the Kaskaskia and its tributaries, including Prairie du Long valley; patchy distribution; occurs in terraces below 410 to 415 feet asl buried by 2 to 5 feet of loess and is buried and discontinuous below Cahokia Formation down-stream of State Route 156

Loess and fine-grained glacial stream sediment; contains cumulic Sangamon Geosol; lies above Glasford Formation; underlies terraces below 440 to 480 feet elevation along lower Prairie du Long Creek

Till; weaker and moister upper portion is supraglacial till, lower, denser portion is basal till; deeply incised, eroded out or not deposited locally on bedrock highs, crops out along most steep stream valley slopes; Sangamon Geosol well developed in upper few feet, usually with well-drained profile

Slackwater lake sediment and loess; patchy distribution; lake sediment occurs in depressions and paleovalleys; loess occurs on bedrock highs in the west

Till and ice-marginal sediment; mainly basal till, includes thin, minor, clay-rich colluvium as uppermost unit and gravelly stream sediment in basal portions; truncated Yarmouth Geosol developed in upper few feet; found in bedrock valleys in eastern half of map; not conclusively identified in west where it was eroded or not deposited

Proglacial lake sediment, depos-ited in dammed bedrock valleys, includes debris flow deposits; buried beneath till of Banner Formation

Non-glacial stream sediment and lag deposits; beneath all other Quaternary units in buried bedrock valleys and depressions; mainly in eastern area, but also as veneer in depressions on high bedrock to the west

Interpretation

Pennsylvanian and Mississippian bedrock; crops out extensively in tributary valleys west of Prairie du Long Creek, where it forms the east limb of the Waterloo-Dupo anticline; karst occurs in the western tier of the map but is predominantly west of the anticline axis

Description

Removed earth; surface mining has removed surficial sediments and exposed bedrock

Added earth; silty to loamy sediments and crushed stone

Silty clay to silt loam to sandy loam; local sand and gravel lenses, 2 to 7 feet thick, in lower part; massive to well-stratified, brown to gray, noncalcareous, modern soil developed in upper few feet; soft to moderately stiff; moist to very moist; up to 25 feet thick

Silt loam to silty clay loam, sandier with few pebbles in lower portion; yellow brown to light olive brown to yellow brown with pink cast; massive to weak blocky or platy structure; friable; matrix typically non-calcareous, but calcite concre-tions occur locally; contains modern soil solum in upper 2 to 5 feet (commonly weathered to silty clay loam); typically up to 9 feet thick, thinning eastward, but thickens in depressions

Silt clay loam to silty clay; massive to laminated; gray, may have pink hue; soft, moist, calcareous, may contain wood and shell fragments; up to 10 feet thick

Silt loam to silty clay loam, may contain thin fine sand beds; massive to well stratified; brown to pale brown; locally strong redox features in upper portions; non-calcareous; up to 30 feet thick

Silt loam to silty clay loam diamicton; massive to weakly bedded; few lenses of silt loam or sand up to 5 feet thick; spruce wood fragments common; upper few feet is weathered, yellow brown with strong brown mottles, relatively softer and moist, with blocky structure, iron-manganese masses in matrix or on ped faces, and clay skins; lower portion is less weathered, olive brown to gray, more uniform, stiff to very hard, low to moderate moisture, and calcareous; typically 15 to 40 feet thick but up to 70 feet thick

Silt loam to silt; massive to laminated, jointed; olive brown to gray; no pebbles; wood fragments, few fossils; non-calcareous to calcareous; stiff; low moisture content; up to 15 feet thick

Silt loam, silty clay loam, and clay loam diamicton; massive; sand lenses up to 10 feet thick; very stiff; low to moderate moisture; upper part is olive to yellow brown, lower part is olive brown to gray; non-calcareous to calcareous; upper few feet may show moderate to strong B horizon characteristics; sharp lower contact; typically 15 to 40 feet thick, but up to 80 feet thick

Silt loam, silty clay loam, and silt; pebbly zones; laminated to bedded, may be distorted; low to moderate moisture; olive brown to gray brown; dolomitic; wood fragments; sharp lower contact; up to 20 feet thick

Silt loam, clay, sandy clay, and gravel; bedded; dry; dark gray to yellow brown; dolomitic to non-calcareous; weak to moderate soil structure, may include A horizon; sharp lower contact; up to 15 feet thick

Description

Sandstone, shale, and limestone; upper few feet may be strongly weathered to clay, or loam; some units fossiliferous; up to 100 feet of relief

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Outcrop in field notes (ISGS archives)

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Water well boring

Engineering boring

Labels indicate samples (S) or geophysical log (G). Boring and outcrop labels indicate the county number.Dot indicates boring is to bedrock

Contact

Inferred contact

Line of cross section

Note: The county number is a portion of the 12-digit API number on file at the ISGS Geological Records Unit. Most well and boring records are available online from the ISGS Web site.

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IGQ Paderborn-SG Sheet 2 of 2

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Kopp CreekKopp Road

Wachtel RoadFloraville Road Haudrich Road

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Knab RoadGerhardt Creek Prairie du Long

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State Route 156

State Route 156

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Rockhouse Creek

State Route156

Toole Branch

original groundsurface

Waterloo Quarry

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Rocky Branch

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Cross Sections

Sand; may contain some gravel or silt

Laminated silt and clay

Diamicton, massive silt, or other fine-grained sediment

Contact

Inferred contact

Horizontal scale: 1 inch = 2,000 feetVertical scale: 1 inch = 100 feetVertical exaggeration: 20×

Cahokia Formation

Disturbed ground

Equality Formation

Peoria and Roxana Silts Glasford Formation

Paleozoic bedrock

Banner Formation,Omphghent member

Petersburg SiltFormation

Banner Formation,Harkness Silt Member

Banner Formation,Canteen member

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