GEOLOGY OF CYPRESS QUADRANGLE Institute of Natural Resource Sustainability William W. Shilts, Executive Director UNION, JOHNSON, AND PULASKI COUNTIES, ILLINOIS Illinois Geologic Quadrangle Map ILLINOIS STATE GEOLOGICAL SURVEY IGQ Cypress-G E. Donald McKay III, Interim Director Joseph A. Devera and W. John Nelson 2009 o S Mav k" 3 Mrb Qc 76 br Qc Mcy Msg Msg e" 225 Mpo Mav Mcy Qce Mpo Qce Mrb EXPLANATION Mrb $T Qce $T Msl $T Mcy Qc Cahokia Formation Mcy Holocene S k"54 Qc TKu Qe S e Msl 228 Cahokia Formation Msg k"51 e" Qc(c) Qe Mpo Msg (clay facies) Sk"51 Qce e"149 Msg o Mrb $T Msl 2 Qe $T $T Qce 293 $T Cahokia and Equality e" Qc(c) Qce Msl Msg Wisconsinan Mav Formations Mav S k"38 $T br Cahokia and Henry Quaternary $T Qch Formations, mapped where Qce Mav Cahokia is 5 feet or thicker $T Msl Henry Formation, mapped Mrb Qh where Cahokia is thinner than 5 feet Illinoian Unconformity $T Mpo Mcy e"105 Qm Msl Metropolis Formation pre-Illinoian Qce Qce QTm Pliocene $T A Mav Mounds Gravel Unconformity Mav Tertiary Miocene to Campanian Tertiary and Cretaceous Qce Qce TKu Msg undivided Mpo Mpo Unconformity Msg Cretaceous Km McNairy and Post Creek Maastrichtian and Formations Campanian Mav Unconformity Msl Mav Mcy Cypress Formation Msl Msg Msl Qce Ridenhower Shale 187 Mrb k" and Bethel Sandstone br Sk" 22 Qce Mav e"105 Mpo Msg Sk" 33 Qce C Sk"18 Qh Msl S 23 Qce k" 41 Sk" $T k" br Msg br 20 Qh Mpo Paoli Limestone 2 $TS 42 Msg $T S k" k" Mav Qce Qh 32 S k"16 Qce Qh Chesterian Qch Sk"64 Msg $T Qch 3 Mississippian Mav Qce Aux Vases Sandstone Qce $T Qh Qh Msg S 87 Ste. Genevieve Limestone k" $T S 57 Qe k" Qch Qc(c) S e" 406 k" br 135 Qh Qh Qch Qh Msl St. Louis Limestone $T 112 k" 130 Qch Qpl k"Qpl 116 k" Qpl Msm Salem Limestone Valmeyeran or Meramecian Qc(c) Qh S k" 71 Qh Qc(c) GS 1755 Note: Loess deposits, comprising the Peoria, Roxana, and Loveland Ü ªDevonian Silts, cover nearly all upland areas of the Cypress Quadrangle. These units are not shown on the geologic map. Sk"76 Qh Qh 169 J k" N k" 209 br Qh br S 115 Symbols k" N J Qch br J C 23 Sk"101 N 45 k" br o Strike and dip of bedding, number indicates degree of dip C 7 Qh Qc(c) e" 100 Qh k" Qh Qce N J k"90 Qch Vertical joints J Qh N Ä 148 Qpl e" N J $T e Horizontal bedding S 61 k" Qh Qce J S k" 61 k"100 N Qh Qh C Outcrop, not shown in northeast quarter of map where C Qh k" Msl $T 15 35 br Qh k" Qce outcrops are numerous N J e"150 e"150 Qc(c) J Msl N 140 br C 19 Msl Qce e" br C k" 190 e" 210 100 br 34 k" 125 e" br k" Qce Qce k" br br k"165 QTm k"123 Qm br k"85 br br br J N Drill Holes J N from which subsurface data were obtained. Sk" 30 br Qce $T e" Stratigraphic boring (ISGS) J Qce N Km N J e" 150 Water well J e" N Msm br Qce Msm e" Qce Engineering boring Qh N J 50 Qc(c) J k" N Qe ª Dry oil test hole Qce 285 e" N J Letters indicate samples (S), geophysical log (G), or core (C). J br N C 30 Numeric label indicates total depth of boring in feet. k" k"330 SGC 54 km br k Unit label denotes formation at bottom (br, Mississippian Qe J bedrock; Qpl, Pearl Formation). N N J Dot indicates location accurate within 100 feet. Km 123 e" J 645 br N k" C 50 165 150 k" br $T k" k" Km Ck"45 km Qce e" 103 Qm br S 116 N J br k" km A� Line Symbols J Qce N Sk" 125 Dashed where inferred, dotted where concealed br QTm Qce N J J N QTm Contact Qce Km N J 200 Normal fault: bar and ball on downthrown side at top of J e" N br Mississippian bedrock J C 30 N $T k" N J km Km A A� Line of cross section 87 C 30 k" Qce J k" br N km QTm N J Note: Well and boring records are on file at the ISGS Geological 260 Records Unit and are available from the ISGS Web site. J N k" $T br 210k" N J br Km J N Qc(c) Km QTm k"140 br S 81 J Km k" N N J Qpl Km J Qce Km N N J QTm QTm Km Km QTm J N Base map compiled by the Illinois State Geological Survey from digital data (Raster Feature SCALE 1:24,000 Geology based on field work and well-log analysis by J. Devera and J. Nelson, 1998–2005. Separates) provided by the United States Geological Survey. Topography by photogrammetric 1 1/ 2 0 1 MILE methods from aerial photographs taken 1963. Field checked 1966. Digital cartography by J. Domier, M. Bentley, and M. Widener, Illinois State Geological 1000 0 1000 2000 3000 4000 5000 6000 7000 FEET Survey. North American Datum of 1927 (NAD 27) 1 .5 0 1 KILOMETER Projection: Transverse Mercator This research was supported in part by the U.S. Geological Survey, National Coopera- 10,000-foot ticks: Illinois State Plane Coordinate system, east and west zones (Transverse tive Geologic Mapping Program under USGS award number 06HQAG0053. The views Mercator) and conclusions contained in this document are those of the authors and should not be 1,000-meter ticks: Universal Transverse Mercator grid system, zone 16 BASE MAP CONTOUR INTERVAL 10 FEET interpreted as necessarily representing the official policies, either expressed or implied, of SUPPLEMENTARY CONTOUR INTERVAL 5 FEET the U.S. Government. NATIONAL GEODETIC VERTICAL DATUM OF 1929 Recommended citation: The Illinois State Geological Survey and the University of Illinois make no guarantee, Devera, J.A., and W.J. Nelson, 2009, Geology of Cypress Quadrangle, Union, Johnson, and expressed or implied, regarding the correctness of the interpretations presented in this Pulaski Counties, Illinois: Illinois State Geological Survey, Illinois Geologic Quadrangle © 2009 by The Board of Trustees of the University of Illinois. All rights reserved. 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 Map, IGQ Cypress-G, 2 sheets, 1:24,000. For permission information, contact the Illinois State Geological Survey. 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° ADJOINING ROAD CLASSIFICATION 123 QUADRANGLES MA TR 1 Anna GNETIC NOR Primary highway, Light-duty road, hard or UE NOR 2 Mt. Pleasant hard surface improved surface 3 Vienna 45 Secondary highway, 4 Dongola TH hard surface Unimproved road For more information contact: 5 Karnak T Institute of Natural Resource Sustainability 6 Pulaski H Illinois State Geological Survey 678 7 Olmsted 615 East Peabody Drive 8 Bandana APPROXIMATE MEAN State Route Champaign, Illinois 61820-6964 DECLINATION, 2008 (217) 244-2414 http://www.isgs.illinois.edu IGQ Cypress-G Sheet 1 of 2 CACHE VALLEY CACHE VALLEY I Mounds Gravel Gravel is yellowish to reddish brown and Introduction Where thickly bedded, oolitic Ste. Genevieve Limestone makes composed dominantly of subrounded to well-rounded chert attractive building or facing stone. Extensive areas of the Ste. A Cahokia Formation Silt and clay; minor sand and gravel. pebbles that range up to about 4 inches in diameter. Pebbles This map shows geologic formations at or near the ground Genevieve are covered only by loess. The St. Louis and Salem surface in the Cypress Quadrangle. In the uplands, the map SERIES AND Predominantly silt and silty clay that are mottled in gray, brown, typically have a bronze gloss or patina. Matrix is largely coarse, Limestones also are potential sources of aggregate and are FORMATION GRAPHIC COLUMN portrays bedrock and partly lithified materials of Pleistocene quarried for this purpose elsewhere in southern Illinois. These STAGE UNIT and yellowish brown. Structure is massive, blocky, or granular; reddish brown sand. Distribution is poorly known because of (FEET) and older age. Not shown are the unlithified surficial materials, formations are at or close to the surface both north and south of SYSTEM rarely laminated. Clay skins, peds, and root traces are common thick loess. Description is based mainly on outcrops and well THICKNESS including wind-blown silt (loess), residuum or weathered DESCRIPTION the Cache Valley. and are features of the modern soil. Also common are pellets, data from adjacent areas. bedrock, and colluvium. In the lowlands, the map depicts the HOLOCENE 0–25 A Cahokia fracture coatings, and small concretions of iron and manganese formations at the surface and at shallow depth. For example, The Cypress Sandstone formerly was quarried near the north- oxide. Calcite nodules are uncommon. Hughes (1987) J Tertiary and Cretaceous strata, undifferentiated Sand the map symbol Qch indicates Cahokia Formation (Holocene east corner of Sec. 20, T13S, R2E.