Bedrock geology of Elsah Quadrangle, Jersey and Madison Counties, Illinois

              Illinois Geologic Quadrangle Map
IGQ Elsah-BG
Base map compiled by Illinois State Geological Survey from digital data provided by the United States Geological Survey. Compiled from imagery dated 1952. Topography and planimetry revisions from imagery dated 1991.
North American Datum of 1983 (NAD 83)
Projection: Transverse Mercator
10,000-foot ticks: Illinois State Plane Coordinate system, east zone (Transverse Mercator)
1,000-meter ticks: Universal Transverse Mercator grid system, zone 15
Recommended citation:
Denny, F.B. and J.A. Devera, 2008, Bedrock Geology of Elsah Quadrangle, Jersey and Madison Counties, Illinois: Illinois State Geological Survey, Illinois Geologic Quadran­gle Map, IGQ Elsah-BG, 2 sheets, 1:24,000.
Geology based on field work by F.B. Denny, 2000–2001.
Digital cartography by J. Domier, L. Verhelst, A. Schultz, and S. Radil, 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 HQ97AG01820. 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, the Illinois Department of Natural Resources, and the State 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 Elsah-BG Sheet 1 of 2
BEDROCK GEOLOGY OF ELSAH QUADRANGLE
JERSEY AND MADISON COUNTIES, ILLINOIS
F. Brett Denny and Joseph A. Devera
2008MAGNETIC NORTHAPPROXIMATE MEANDECLINATION, 2008TRUE NORTH / °12ROAD CLASSIFICATIONPrimary highway,hard surfaceSecondary highway,hard surfaceLight-duty road, hard orimproved surfaceUnimproved roadState Route
ADJOINING
QUADRANGLES
1 Otterville
2 Jerseyville South
3 Brighton
4 Grafton
5 Alton
6 St. Charles, MO
7 Florissant, MO
8 Columbia Bottom
BASE MAP CONTOUR INTERVAL 10 FEET
NATIONAL GEODETIC VERTICAL DATUM OF 1929
For more information contact:Illinois State Geological Survey 615 East Peabody Drive
Champaign, Illinois 61820-6964
(217) 244-2414
http://www.isgs.uiuc.edu12345678
Released by the authority of the State of Illinois: 2008
7000
FEET10001000020003000400050006000.51 KILOMETER10SCALE 1:24,0001/2101 MILE
Illinois Department of Natural Resources
ILLINOIS STATE GEOLOGICAL SURVEY
William W. Shilts, Chief
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MslMsMwMbkHolocene andPleistoceneValmeyeranMississippianQuaternaryCahokia-Equality FormationundifferentiatedSt. Louis LimestoneWarsaw FormationBurlington-KeokukLimestonesSalem LimestoneEXPLANATIONAA􀀁􀄲250250"e"e4e620ÆeSymbolsStrike and dip of bedding; number indicates degree of dipHorizontal beddingVertical jointsOutcrop of special note, shown where unitor contact was well exposed during mappingAbandoned quarryDrill Holes from which subsurface data were obtainedWater-well boringEngineering boringOther boringLabels indicate samples (S), geophysical log (G), or core (C). Numeric label indicates total depth of boring in feet. Line Symbolsdashed where inferred ContactElevation of top of Burlington-KeokukLimestones; contour interval 50 feetLine of cross sectionNote: Well and boring records are on file at the ISGS Geological Records Unit and are available online from the ISGS Web site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􀀁􀅯oooooooÄooÄoooooÄoeoÆeeeeeeo"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"e"eCe697135356734538538526540538510521028028525526528030524028025712520532030027822030526516719827332433 424432322332MsMwMsMsMslMsMslMwMslQceQceQceQceQceQceQceQceQceQceQceQceMwMsMsMslMsMsMbkMbkMbkMbkMbkMbkMwMwMwMwMwMwMsMsMsMsMbkMwMwslMslMsMsMwMwMsMbk