Surficial Geology of the Romeoville Quadrangle Part of Cook, Du Page, Will Counties, Illinois, United States Midwest Institute of T36N, T37N and T38N, R10E and R11E Geosciences and Engineering 2013 Steven D.J. Baumann, Alexandra B. Cory Page 1 of 2 Publication Number: M-112013-3A GOLOGIC MAP W Qh-v e s t Qw Qw C h i c a g K o e e E n n y d vi RELATIONSHIP OF GEOLOGIC UNITS M l Qc l o e W r Qw E a h n i e n d a e t M GEOLOGIC UNIT AGE (Millions of Years Ago) o Qh-v n o r E a n i n d e M o Hml Hm r a i Present to 0.010 Qw Hml n e Qc Qg Qh-v Qh-f Qg Qh-p Qh-p Qg 0.01 to 0.012 Qly Qg Hm Hm Qh-v Hm Qh-v Barbers Quarry Hm Su Hm Qg Qw Qc (Keenyville) Qh-p Qu Hm Quaternary Quaternary Qw Qh-v (Wheaton) W e 0.013 to 0.015 s Qg t Qw Qw C h (West Chicago) i c a g Qw o Qh E Qh Qe n d R o Qw M c o W k r d a h a i e l n Qly e a e t En o 0.016 to 0.017 n d Qh E M n d o r M a i o n r e a Qh-p i n e Qly Sr Qc Qw Qh-f Ss 419 to 430 Qh-v Qly Qh-p W Ss Hm Sj Qw e Su A s -f Qly t h Q C Silurian Silurian h i Sj c Hm a Qw Qh-f K g Sr Sk a o nka Sr ke E Hm 430 to 440 e A n rc d Qh-f m h H M Qh-v Se o Hm Ss r Qly a -f Hm Qh-f i h Qh-p n Q e Sj Hm Qh-f Ss 445 to 453 Qly Om Hm Qh-f Qw -f Qh Qly Qh-p Sr Sk Ogp Hm Hm Qh-v Sj Qly 455 to 470 Ss Ss Hm R o Qh-v c Qw Oa k Hm Hm Qh-f Ordovician d a l e Qh-v En Qh-f d Hm M Qly o COk 475 to 495 r a i n Qh-v e Qh-f Qw Ss Cf 497to 505 Qly Sj Qg Qh-v W Hm h e W a e Sr t o s t n Ss C Cambrian E Cgi h n i d c a 505 to 515 M g o o Hm r E a Ce n i n d R e Hm o M Qh-f Qh-f c o Qly k r * Ages are adapted from the 2012 Geological d a a i Society of America Timescale l n e e En Qh-f d A’ M o r a i n Qly e Qw Ss Qh-v Sj Qh-v Qh-v TRUE NORTH Topographic base map was produced by the United States Geologic Survey. MAGNETIC NORTH 2 -3.4o Interstate Route US Route State Route Map Area = 56.62 miles 2013 Topographic Base Map ILLINOIS GEOLOGIC MAP SYMBOLS REFERENCES Buschbach, T.C., 1964, Cambrian and Ordovician Strata of Northeastern Illinois, Illinois State Geological Sur- Anticline vey, Report of Investigation 218 Approxmate Emrich, G.H., 1966, Ironton and Galesville (Cambrian) Sandstones in Illinois and Adjacent Areas, Illinois Map Area State Geological Survey, Circular 403 A Cross Section Line Frye, J.C., 1973, Rock Stratigraphy of the Silurian System in Northeastern and Northwestern Illinois, Illinois State Geological Survey, Circular 479 A’ Hansel, A.K., 1996, Wedron and Mason Groups: Lithostratigraphic Reclassification of Deposits of the Wiscon- Geologic Contact sin Episode, Lake Michigan Lobe Area, Illinois State Geological Survey, Bulletin 104 Kolata, D.R., 1983, Lithostratigraphy and Depositional Environments of the Maquoketa Group (Ordovician) in Northern Illinois, Illinois State Geological Survey, Circular 528 Approximate End Moraine Contact Mikulic, D.G., 1985, Silurian Geology of the Des Plaines River Valley, Northeastern Illinois, Illinois State Geo- logical Survey, Guidebook 17 Visocky, A.P., 1985, Geology, Hydrology, and Water Quality of the Cambrian and Ordovician Systems in Unconformity Northeastern Illinois, Illinois State Geological Survey and the Illinois State Water Survey, Cooperative Groundwater Report 10 Willman, H.B., 1978, The Platteville and Galena Groups in Northern Illinois, Illinois State Geological Survey, Circular 502 Surficial Geology of the Romeoville Quadrangle Part of Cook, Du Page, Will Counties, Illinois, United States Midwest Institute of T36N, T37N and T38N, R10E and R11E Geosciences and Engineering 2013 Steven D.J. Baumann, Alexandra B. Cory Page 2 of 2 Publication Number: M-112013-3A CROSS SECTION A - A’ (Shallow) A Feet above Long Mean Sea Run I-355 Level I-55 Lily Cache Railroad Railroad 750 35th Creek A’ Des Plaines River 700 Qh-p Qc Qw Qh-v Qh-v Qw Qw 650 Qh-p Sr Qly Qh-f Hm Qly Qh Qh Qh Ss DESCRIPTION OF GEOLOGIC UNITS 600 Sr Qe Sr Ss QUATERNARY Sj 550 Sj Hml: Human made landfill: Greene Valley Landfill (closed 1996), contents are trash (0-140 feet thick) Sj Sk 500 Sk Hm: Human made land: Mostly construction debris and local natural materials derived from quarries and canal excavations that have been assembled into mounds (0-30 feet thick) 450 Se Sk Om Om Om Se Qc: Cahokia Formation: Light brown to black, SAND, SILT, laminated CLAY; deposited in modern streams 400 (0-20 feet thick) Vertical Exaggeration = 20x Qg: Grayslake Peat: Dark brown to black, ORGANIC CLAY and PEAT, deposited in post glacial lakes and bogs; (0-25 feet thick) Qh-f: Henry Formation, alluvial fan facies: Orange brown to brown, SAND and GRAVEL with silt and CROSS SECTION A - A’ (Deep) cobbles, deposited as alluvial fans near cliffs (0-70 feet thick) Qh-p: Henry Formation, outwash plain facies: Yellow brown to brown, SAND with gravel and plastic silt, deposited at the front of melting glaciers (0-30 feet thick) A Feet above A’ Qh-v: Henry Formation, valley facies: Orange brown to brown, clayey SAND and rounded GRAVEL, de- Mean Sea Level posited in stream and river valleys in glacial outwash channels (0-120 feet thick) 750 Qw: Wadsworth Formation: Gray to dark gray, DIAMCTON with glacial erratics (0-150 feet thick), com- Qu Qu posed of several end moraines of similar composition 550 Su Su Om Qly: Lemont Formation, Yorkville Member: Light gray to bluish gray, gravelly to boulder DIAMICTON Om 150 (0-80 feet thick) Ogp Oa -350 Qh: Henry Formation, undivided: Light brown, yellow brown, to brown, SAND, GRAVEL, and SILT, with COk Cf clay and cobbles, subglacial outwash which may correlate with other facies of the Henry Formation (0-60 -750 feet) Cgi Ce -950 Qu: Quaternary, undivided in cross section Vertical Exaggeration = 5x SILURIAN Sr: Racine Formation: Gray, silty micritic DOLOSTONE with white chert (0-30 feet thick) Ss: Sugar Sun Formation: Light gray to very pale greenish gray, argillaceous DOLOSTONE (0-27 feet thick) DISCUSSION Sj: Joliet Formation: White to light gray mottled red and green, micritic to coarse crystalline DOLOSTONE with beds of gray and red shale in the bottom third (70-85 feet thick) The Romeoville Quadrangle encompasses the all or part of Naperville, Romeoville, and Lemont. It is an area of hills and plains with two Cambrian major tributaries running through it. The Du Page River (north) and the Des Plaines River (south) have been the scene of active quarries The Cambrian consists of very productive sandstones. Most deep municipal wells are set into the Ironton and Galesville For- Sk: Kankakee Formation: Pale yellow brown to light brown, fine to coarse crystalline DOLOSTONE with since the early 19th Century. Both Rivers have been extensively altered by humans activity. mations in the quadrangle. The Ironton-Galesville is separated from the Knox by the Franconia Formation. The Franconia some chert (20-40 feet thick) Formation contains glauconite. Glauconite makes the sand very green and the Franconia is often referred to as “green sand” Quaternary by drillers. The Ironton and Galesville are lumped together because of the difficulty in separating the two in driller’s logs. Se: Elwood Formation: Light gray, argillaceous DOLOSTYONE with some to abundant white chert (0-20 The modern landscape has been mostly influenced by the Wisconsin Episode glaciers. They formed four named end moraines (see map) feet thick) in the area, and coarse outwash deposits cover large portions of the map area. The glaciers both advanced from the northeast and re- Below the Ironton-Galesville is the Eau Clair Formation. The Eau Claire is as much as 400 feet thick outside of the quadran- treated to the northeast. The Yorkville Member of the Lemont Formation is a unique glacial diamicton in the area. It tends to be very gle. However, the deepest well drilled within the quadrangle only penetrates a few dozen feet into the formation. The Eau Su: Silurian: undivided on map and cross section hard, commonly contains boulders, and serves as an aquitard. It was referred to as “the Lemont drift” in publications prior to the 1990s. Claire is an aquitard and isn’t a productive source of groundwater. Coarse outwash deposits are common in valleys, on till plains, and in the subsurface. In the subsurface, they contain enough groundwa- ORDOVICIAN ter to be used for small private wells. The deep cross section ends in the Eau Claire because no deeper formation has been penetrated.