Geology of Cairo quadrangle, Alexander and Pulaski Counties, Illinois

              Illinois Geologic Quadrangle Map
IGQ Cairo-G
Base map compiled by Illinois State Geological Survey from digital data provided by the United States Geological Survey. Planimetry of Illinois compiled by photogrammetric methods from imagery dated 1965. Topography partly by planetable surveys 1967. Revised from imagery dated 1993. PLSS and survey control current as of 1967. Map edited 1996. Contours not revised. Contours that conflict with revised planimetry are dashed.
North American Datum of 1983 (NAD 83)
Projection: Transverse Mercator
10,000-foot ticks: Illinois: Illinois State Plane Coordinate system, west zone (Transverse Mercator)
1,000-meter ticks: Universal Transverse Mercator grid system, zone 16
Recommended citation:
Nelson, W.J., 2008, Geology of Cairo Quadrangle, Alexander and Pulaski Counties, Illinois: Illinois State Geological Survey, Illinois Geologic Quadrangle Map, IGQ Cairo-G, 2 sheets, 1:24,000.
Geology based on field work and well-log analysis by W. John Nelson, 1999–2002.
Digital cartography by J. Domier, M. Widener, and J. Palmer, Illinois State Geological Survey.
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 Cairo-G Sheet 1 of 2
GEOLOGY OF CAIRO QUADRANGLE
ALEXANDER AND PULASKI COUNTIES, ILLINOIS
W. John Nelson
20081°APPROXIMATE MEANDECLINATION, 2008MAGNETIC NORTHTRUE NORTHROAD CLASSIFICATIONPrimary highway,hard surfaceSecondary highway,hard surfaceLight-duty road, hard orimproved surfaceUnimproved roadInterstate RouteU.S. RouteState Route
ADJOINING
QUADRANGLES
1 Tamms
2 Pulaski
3 Olmsted
4 Cache
5 Barlow
6 Charleston
7 Wyatt
8 Wickliffe
BASE MAP CONTOUR INTERVAL 5 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
MILES1/21/40Scale 1:36,000315320315305315310315310315MISSISSIPPIRIVEROHIORIVER62605151T 17 S – R 1 W 35262536BALLARD COALEXANDER COLEVEECAIROAngelo TowheadILLINOISMISSOURIKENTUCKY"e811brQc(c)Qc(s)Qc(s)Qc(s)Qc(s) BPartial Wyatt Quadrangle MILES1/40Scale 1: 24,000QmQc(s)Qc(c)310320320OHIORIVERPartial Barlow Quadrangle ILLINOISKENTUCKYCook Cem ACairoBarlowWyattIndex map to adjoining partial quadrangles. A BQc(s)QcQc(f)Qc(c)QmTwafQTmPliocenePleistoceneEoceneHoloceneTertiaryQuaternaryArtificial fillMetropolis Formation(loess cover not shown)Mounds Gravel (loess cover not shown)(sandy deposits)(alluvial fans)(clayey deposits)UnconformityEXPLANATIONCahokia FormationUnconformityWilcox Formation(loess cover not shown)Note: Loess deposits, comprising the Peoria, Roxana, and Loveland silts, cover uplands near the northern edge of the map. Loess is not shown on this map.AA􀀁􀄢"e109Tpc""eeª"kSGCDrill Holesfrom which subsurface data were obtainedStratigraphic boring (ISGS)Water wellEngineering boringDry oil test hole Numeric label indicates total depth of boring in feet. Borings with samples (S), geophysical log (G), or core (C).Unit label denotes formation at bottom (Tcw, Claiborne/Wilcox; Tpc, Porters Creek Clay/Clayton; O_k, Knox Group; Koc, Owl Creek; Km, McNairy; Dnh, New Harmony; br, bedrock). Dot indicates location accurate within 100 feet.Line SymbolsDashed where inferred, dotted where concealedContactLine 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. 315310320300310315310315315320320315315305315315310310315350315310310320320350315315315315315325350375310305315310300310315315303103153153153204253153103253103153003103153203203153103153103103153753153153253153153153253103103153153153153103103153153003151530531532031530042531531031531031531532031532531531032031532531531532031532032032531531030532032031032031532531531532031031031320320325315315315315315375395310315315315315320315305310310310320315375305425350310305400320305320))))))))))))))))))))))))))))))))))))109872526272434562322333231141529301110920191234536353433323025262728292019242322212017181314151617R. 17 E.R. 1 W.51606251515757335137T. 28 N.T. 27 N.T. 16 S.T. 17 S.T. 28 N.T. 27 N.T. 16 S.T. 17 S.R. 1 W.R. 1 E.37THIRDPRINCIPALMERIDANR. 1 W.R. 1 E.A􀀁􀅁A"kSܪS"k"kS"kS"kS"kS"kS"kS"kS"kS"kS"eG"e"k"k"kS"kG"kC"k"kS"kS"e"eSܪGSQcQcbrbrbrQcQcQcQcQcQcKmDnhTcwDnhDnhTpcTpcDnhDnhKocKocTpcDnhO_kO_k525682104015291595650109459132630310807628564967832261771707529563103320Qc(f)QTmTwQcQcTwQTmQTmQcTwTwQTmTwQcTwQTmQTmQmQcQmQc(f)Qc(f)QmQcQc(c)TwQcQc(c)QmQc(s)Qc(c)Qc(s)Qc(c)Qc(c)Qc(c)Qc(s)Qc(c)Qc(s)Qc(s)Qc(c)afQcaf