BEDROCK GEOLOGY OF WINFIELD QUADRANGLE ILLINOIS STATE GEOLOGICAL SURVEY CALHOUN COUNTY, ILLINOIS STATEMAP Winfield-BG E. Donald McKay III, Interim Director Mary J. Seid and Joseph A. Devera 2008 A� R. 2 W. C� 0 � Ò 0 45 45 79 Odp 0 7 43 Qal Z 50 2 E. 3 E. 382 22 Z 20 " Mh R. R. e 4 21 600 65 Mh 450 5 60 N o 0 0 50 0 0 � 50 0 0 Z 5 550 10 0 Mct 500 0 � 55 30 19 4 � 7 5 0 5 DS 0 0 0 5 7 7 Mbk 0 � 0 3 6 � � 6 � 5 o 5 Osp 0 0 19 Oj 650 Mct� 24 6 23 600 00 0 30 550 55 6 5 550 � 0 0 � 60 0 0 DS 0 � 47 B� � Om Mct Mh � 5 5 5 29 A 0 00 28 o� 700 27 8 o Mct Odp � � 20 5 � Ok Om 3 3 � 0 EXPLANATION � 0 6 5 o 5 0 5 0 70 4 Oe 0 5 0 6 o 0 0 Ò 5 0 0 50 6 � 6 DS 600 0 o 5 0 � 6 o 600 55 Quaternary Qal Alluvium Holocene 4 5 5 120 Mh � 0 � 5 Om 50 0 50 50 Pennsylvanian undivided 5 o Oj 5 o 0 25 o 50 &u Shelburn, Carbondale, 4 30 Pennsylvanian Desmoinesian 29 v 11 3 N o � DS J NJ o and Tradewater Formations 45 500 4 � o 0 39 56 o 0 � 15 43 � � Mh � Â o � � 6 44 Unconformity Mct 40 Mu 50 0 5 6 5 5 0 0 5 0 Msl St. Louis Limestone Mbk 0 5 5 0 � Msw 32 e" Unconformity 33 20 550 5 285 34 0 1 5 Salem and Warsaw Msw Valmeyeran 0 B 5 � 5 5 Formations � � 00 0 Ò 0 � � � 5 470 430 6 Mississippian 0 0 0 55 Burlington-Keokuk 0 Mbk 0 � 45 45 500 Limestones e � T. 12 S. � T. 12 S. � Unconformity T. 13 S. e" 305 T. 13 S. 500 Mississippian undivided 31 32 Mct � � Chouteau Limestone Msl 500 � Mu Kinderhookian 0 0 � 6 Mh Hannibal Shale � 50 & 4 u 5 0 5 0 0 500 0 Unconformity 550 Devonian and Silurian 0 3 45 � 5 4 Formations � DS T. 49 N. Cedar Valley Limestone Upper Middle Devonian 50 � � 0 Unconformity 0 T. 49 N. 36 � 600 50 Ò T. 48 N. Joliet Formation 2 E. 3 E. 550 Msl 00 R. T. 48 N. R. 5 Devonian and Unconformity Niagaran � � 50 Silurian Kankakee Formation 4 � 0 Unconformity 50 50 4 600 Bowling Green Formation Alexandrian 550 � 430 � 500 Unconformity 43 430 0 6 430 520 1 Om 0 Maquoketa Formation 55 � � � Cincinnatian 430 Unconformity 60 � 0 � 8 9 � 10 550 Ok Kimmswick Limestone 600 550 430 &u � 600 430 Qal � Ò � 500 0 50 0 Odp Decorah and Plattin 45 12 7 550 Msl Limestones � 500 C Ordovician Unconformity 430 4 600 50 � 550 Oj Joachim Dolomite 79 430 � 430 Msl � 550 Champlainian 430 500 � 430 17 600 450 e � Osp St. Peter Sandstone C � � � Unconformity � 0 16 0 7 Qal 6 8 15 Oe Everton Dolomite 430 430 550 5 � 00 � 4 Ò 50 � 5 500 5 0 430 � &u 5 5 6 � 5 00 0 0 0 5 5 4 0 50 � Symbols 79 1250e" � 5 0 &u Strike and dip of bedding; number indicates 0 40 5 500 430 0 0 degree of dip 2 E. 3 E. 17 R. � R. 430 Qal � Z 56 16 Â Inclined joint; number indicates degree of inclination 18 13 Ò 21 430 � Horizontal bedding � 430 v 500 4 430 5 0 Vertical bedding � 15 22 430 � 450 430 Outcrop of special note, shown where contact � � Msl 430 � or map unit was well exposed at time of mapping Z � 0 &u 50 430 5 Drill Holes 500 50 22 Ò e from which subsurface data were obtained Numeric label indicates total depth of boring in feet 450 � 20 450 109 24 21 e" Water-well boring � � 27 19 430 � Line Symbols Z dashed where inferred, dotted where concealed 430 430 55 0 � 23 Contact 23 & 50 u 0 5 0 0 420 Normal fault; bar and ball on downthrown side 4 5 0 26 25 Line of cross section Ò A A� 430 Note: Well and boring records are on file at the ISGS Geological 0 420 Records Unit and are available online from the ISGS Web site. 26 45 0 50 27 420 30 29 28 � 25 � � � � � � 26 00 5 � Z 500 50 0 � 33 450 31 32 35 36 � 36 T. 48 N. 34 Y 35 79 R. 2 E. R. 3 E. Base map compiled by Illinois State Geological Survey from digital data (Digital Line SCALE 1:24,000 Geology based on field work by Mary J. Seid and Joseph A. Devera, 2007–2008. Graphs) provided by the United States Geological Survey. Compiled by photogrammetric 1 1/ 2 0 1 MILE methods from imagery dated 1952. Field checked 1954. Revised from imagery dated 1993. Digital cartography by Jane E.J. Domier, Steven M. Radil, and Brendon M. Aitken, Illinois 1000 0 1000 2000 3000 4000 5000 6000 7000 FEET PLSS and survey control current as of 1954. Map edited 1996. DLGs created 1998. State Geological Survey. 1 .5 0 1 KILOMETER North American Datum of 1983 (NAD 83) This research was supported in part by the U.S. Geological Survey National Cooperative Projection: Transverse Mercator Geologic Mapping Program (STATEMAP) under USGS award number 07HQAG0109. The 10,000-foot ticks: Illinois State Plane Coordinate system, west zone (Transverse Mercator) views and conclusions contained in this document are those of the authors and should not 1,000-meter ticks: Universal Transverse Mercator grid system, zone 15 BASE MAP CONTOUR INTERVAL 10 FEET be interpreted as necessarily representing the official policies, either expressed or implied, NATIONAL GEODETIC VERTICAL DATUM OF 1929 of the U.S. Government. The Illinois State Geological Survey and the State of Illinois make no guarantee, ex- Released by the authority of the State of Illinois: 2008 pressed 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. 1 /2 ° ROAD CLASSIFICATION ADJOINING 123 QUADRANGLES 1 Luckett Ridge TH Primary highway, Light-duty road, hard or 2 Foley TH hard surface improved surface 3 Nutwood 45 Secondary highway, 4 Maryknoll UE NOR hard surface Unimproved road GNETIC NOR 5 Brussels TR For more information contact: 6 Wentzville MA Illinois State Geological Survey 678 7 O’Fallon 615 East Peabody Drive APPROXIMATE MEAN 8 Kampville State Route Champaign, Illinois 61820-6964 DECLINATION, 2008 (217) 244-2414 http://www.isgs.uiuc.edu STATEMAP Winfield-BG Sheet 1 of 2 A Alluvial deposits Alluvium. Clay and silt, including detrital deposits made monly thin, undulatory to wavy. Dark-gray chert with white rims occurs as wavy E MEMBER THICKNESS FORMATION or GRAPHIC COLUMN by streams on river beds and floodplains. All sediment is confined to tributaries, beds at regular intervals throughout the unit. Knobby calcite nodules that are AG (feet) BED UNIT creeks and major river systems. rimmed in quartz are distinct on a weathered surface. The lower contact is con- SERIES ST SYSTEM formable but sharp. B Peoria and Roxana Silt Silt. Yellow-brown, reddish, with variable amounts of clay. Windblown material thickly mantles the bedrock close to the major river L Hannibal Shale Shale. Generally greenish gray to gray, silty and weathers Alluvial Y deposits 0–170 A system and gradually thins away toward the east in the study area. to sticky or gummy clay. It is poorly exposed in this quadrangle but can be mas- sive, non-calcareous, and fissile. The basal contact is unconformable with the HOLOCENE C Grover Gravel Gravel. Poorly sorted, contains particles that range from limestone below. - sand and granule to pebble size. Clasts are composed of polished and rounded TERNAR A Peoria and Loess 20–70 B quartzite, chert, quartz, and rare red and black banded iron. The clasts can be M Cedar Valley Limestone Limestone and dolostone. Brown to orange- QU Roxana Silt SINAN red, white, pink, orange, yellow and black. This deposit is poorly exposed and is brown fossil wackestone dominated by spiriferid brachiopods. Other diagnostic OCENE PLEIST WISCON- ? mainly found in the alluvium in the southern part of the quadrangle. It occurs di- brachiopods include: atrypids, Mucrospirifer sp., Paraspirifer sp., Orthospirifer rectly above the bedrock but is covered by loess. iowaensis, Ilita johnsonensis and strophominids. Large rugose corals and articu- TERTIARY PLIOCENE Grover Gravel 0–20 C lated and disarticulated crinoid stems are common in places. Laterally, this unit Shelburn 0–28 D D Shelburn Formation Clay and limestone. Composed of a basal limestone can grade into fossil packstone facies. The packstone is thin bedded, dolomitic, overlain by claystone, with a limestone at the top of the section. The basal lime- and sandy in places and contains 1 to 2 inch in diameter calcite crystals. Some Mecca Quarry stone is a dense, dark gray fossiliferous packstone and locally contains gray calcite crystals are oil stained and have a petroliferous odor. The base can be ANIAN V Carbondale Shale 65–90 E nodules of chert.