BEDROCK GEOLOGY OF CARBONDALE QUADRANGLE Prairie Research Institute JACKSON AND WILLIAMSON COUNTIES, ILLINOIS Illinois Geologic Quadrangle Map ILLINOIS STATE GEOLOGICAL SURVEY IGQ Carbondale-BG W. John Nelson 2013 89°15' 12'30" 10' 89°07'30" 720 000FEET (IL E) 3 000mE 3 3 3 3 3 3 R. 1 W. 2 590 000 FEET (IL W) R. 1 E. 3 37°45' 03 04 05 06 07 08 10 12 37°45' 51 4180 7 8 9 10 11 12 7 8 000m &c 4180 N 13 &c Creek d r a & h t c m r C CG 508 O &c k" m r a U.S. 366 41 b e" 79 Fish and 18 17 16 15 &t 18 17 &c 13 Wildlife Ho g an 14 Po i n t 4179 m O b r a c r h Pine C a Lo n g Vi ew Island 390000 r 13 d Park FEET (IL E) Sk" 98 390 000 Ck" 322 k" 97 FEET (IL W) m 152 E 4178 k e" K r o A F L 41 ¿ S 273 78 k" PO D ¿ m R e 13 A l C t H t r i CARBONDALE C L R EXPLANATION O 19 22 19 20 20 23 24 B m A 21 R ¿ C Holocene sm Surface mine 4177 k" 105 &t ¿ m c s ¿ 41 e &t 77 Univ ersity l i &c Carbondale Formation School P m » m Desmoinesian Tradewater Formation s s, Stonefort Limestone Member m m, Murphysboro Coal Member Pennsylvanian c c, Curlew Member Southern Illinois ¿ University S 62 &t k" &t-mb Murray Bluff Sandstone Member » &t s 4176 Atokan ¿ &t &t-o olive shale member 27 4176 29 &t-g Grindstaff Sandstone Member 29 C s am e 28 30 pus Lak À 26 25 30 42'30" À 42'30" ¿ 270 m À k" S 1201 &t 290 270 Ü k" k" ªNorth uthern Hill s m So 4175 s k"317 k" 137 s 4175 &t-mb ¿ Symbols Marberry Arboretum 40 Strike and dip of bedding; number indicates degree of dip Carbondale &t r ¿ Reservoi m Horizontal bedding &t r sm ¿ 31 Evergreen Terrace C 32 Vertical joints 4174 31 34 35 36 32 k r 33 ¿ c o ¿ » Shaft mine Sk" 250 F 51 4174 ¿ S ¿ y ¿ Slope mine &t-mb c a m o ¿ À » r m Drift mine c e s m le ¿ ¿ i & ¿ t-mb m ¿ P sm ( À T. 9 S. T. 9 S. sm Outcrop of special note, shown where contact m ( T. 10 S. or map unit was well exposed at time of mapping T. 10 S. sm 4173 &t 4173 Drill Holes from which subsurface data were obtained sm e" 3 2 6 Stratigraphic test boring, continuously cored 6 5 c 4 &t 1 5 c e" Water-well boring D ry À ru e" 4172 Coal-test boring c À c ª Dry oil-test hole 4172 Labels indicate samples (S), geophysical log (G), or core (C). In SGC 109 Numeric labels indicate total depth of boring in feet. dian k" Boskydell Fox Label name indicates well name. À t Dot indicates location accurate within 100 feet. s &t-mb o Branch &t-mb L Ä Ä c c 40' Ä 40' 10 11 Line Symbols 12 8 9 Creek 7 dashed where inferred, dotted where concealed 4171 7 À c 8 c À Contact Creek À À ) ) ) Thrust or reverse fault, sawteeth on upthrown side c &t &t-mb &t-mb Note: Well and boring records are on file at the ISGS Geological &t S 1684 4170 Records Unit and are available online from the ISGS website. Ü Ä ª &t Fox &t-o 41 70 Little Grassy c Fish Hatchery &t r O C o C O 360 000 C y 8 N s &t-o s e O 360000 14 N a FEET (IL E) S r c Ä 13 O 18 18 G S FEET (IL W) 17 e" 39016 15 M 17 K A S 305 e I k" l C t L it A L I L J c 41 W 69 S H A W N E E e k a L 41 69 r o b r &t-mb A c g n i r p S k" D Ä &t &t-mb Camp r o u e Carew k r a N A y T I O N A L F O R E S T 4 L sy 4168 &t-o &t s ra G &t &t-mb Ä e 4168 tl 23 it L 19 20 3 24 258 19 21 22 e" Pine Ridge Camp 20 o Ä C 375 e k" SIU e" 310 In Aquaculture G 3120 &t-mb 7 d ªÜ e o ia Kristoff n &t &t-mb &t &t &t-mb 4167000mN &t-mb &t-o &t-mb &t-g G 840 e k" Creek &t-mb 4167 &t-mb k"197 Creek 25 27 51 28 26 30 Cedar Point 30 29 & t-o Camp 29 &t &t &t 1000 & &t-mb &t-o &t 37°37'30" k" t-o &t-g 37°37'30" 302 303 2 570 000 FEET (IL W) 3 3 3 3 R. 1 W. 3 R. 1 E. 750000 FEET (IL E) 312000mE 89°15' 12'30" 06 07 08 10' 09 10 89°07'30" Base map compiled by Illinois State Geological Survey from digital data (Raster Feature SCALE 1:24,000 Geology based on field work by W. John Nelson, 2000–2001. Separates) provided by the United States Geological Survey. Topography compiled 1963. 1 1/ 2 0 1 MILE Planimetry derived from imagery taken 1993. PLSS and survey control current as of 1996. Digital cartography by Jane E. Johnshoy Domier and Trisha S. Rentschler, Illinois State 1000 0 1000 2000 3000 4000 5000 6000 7000 FEET Geological Survey. North American Datum of 1927 (NAD 27) 1 .5 0 1 KILOMETER Projection: Transverse Mercator The Illinois State Geological Survey and the University of Illinois make no guarantee, 10,000-foot ticks: Illinois State Plane Coordinate system, west zone (Transverse Mercator) expressed or implied, regarding the correctness of the interpretations presented in this 1,000-meter ticks: Universal Transverse Mercator grid system, zone 16 document and accept no liability for the consequences of decisions made by others on the BASE MAP CONTOUR INTERVAL 10 FEET basis of the information presented here. The geologic interpretations are based on data NATIONAL GEODETIC VERTICAL DATUM OF 1929 that may vary with respect to accuracy of geographic location, the type and quantity of Recommended citation: data available at each location, and the scientific and technical qualifications of the data Nelson, W.J., 2013, Bedrock Geology of Carbondale Quadrangle, Jackson and Williamson sources. Maps or cross sections in this document are not meant to be enlarged. Counties, Illinois: Illinois State Geological Survey, Illinois Geologic Quadrangle Map, IGQ Carbondale-BG, 2 sheets, 1:24,000. © 2013 University of Illinois Board of Trustees. All rights reserved. For permission information, contact the Illinois State Geological Survey. 1½° ADJOINING ROAD CLASSIFICATION 123 QUADRANGLES M A TR 1 Murphysboro G N UE NOR 2 De Soto E TI U.S. Route 3 Herrin C 45 N 4 Pomona TH O 5 Crab Orchard Lake R T State Route Prairie Research Institute H 6 Cobden Illinois State Geological Survey 678 7 Makanda 615 East Peabody Drive Local road 8 Lick Creek APPROXIMATE MEAN Champaign, Illinois 61820-6918 DECLINATION, 2013 (217) 244-2414 http://www.isgs.illinois.edu IGQ Carbondale-BG Sheet 1 of 2 Introduction A Carbondale Formation Shale, siltstone, sandstone, and coal. Confined to the well laminated. Siltstone is mostly light to medium gray and displays planar, wavy, This map portrays the distribution of bedrock formations and members in the Carbon- THICKNESS northeast corner of the quadrangle, the Carbondale is known only from well logs. and rippled lamination. Sandstone is light gray to buff, very fine to fine grained, and FORMATIONMEMBER GRAPHIC COLUMN dale Quadrangle as they would appear if all of the unlithified Quaternary sediments were (FEET) The only detailed record is that of the ISGS #1 U.S. Fish & Wildlife Service boring, laminated to thinly bedded. It commonly shows ripple and cross-lamination. Lenses UNIT removed. It is a companion to the map of surficial geology of the Carbondale Quadrangle SERIES which was cored continuously. The Carbondale Formation is 62 feet thick in this of conglomerate composed of quartz and ironstone pebbles in a sandstone matrix SYSTEM (Nelson 2013b). Because glacial deposits cover much of the map area, much of the bed- core and contains two named members, the Dekoven and Davis Coals. The De- were observed in two or three places. The core from the U.S. Fish & Wildlife Ser- rock geology had to be deduced from borehole records or inferred and projected on the koven is 1.3 feet thick and consists of brightly banded coal having laminae of dark vice borehole contains a coal bed 0.8 foot thick believed to belong to this interval. gray shale. The coal grades upward to carbonaceous shale that contains abundant A coal bed as thick as 2.5 feet was formerly mined within this interval immediately basis of information from scattered outcrops. This is particularly true in the northern part Mecca Quarry 2–5 of the map area, where Quaternary deposits are thickest and several deep, buried pregla- Shale 1-2 fossil plants; this in turn grades upward to gray siltstone without fossils.