Deglacial History and Paleoenvironments of Northeastern Illinois

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Figure 3 Projected growth areas in northeastern Illinois (from the Northern Illinois Planning Commission(NIPC)). Kendall County, not part of NIPC, is presently the fastest growing county in the United States(Keen, 2008).Presently, the ISGS is engaged in an ambitious program of mapping the surficial geology of theentire state at a scale of 1:24,000 (ISGS, 1992; Bhagwat, 2001; Figure 4). Begun in earnest inthe late 1990’s, geologic mapping has been funded by federal and state programs (STATEMAP,EDMAP, and CGLGMC (The Central Great Lakes Geologic Mapping Coalition)) and by variouscounty agencies, particularly in Kane, Lake, McHenry, DuPage, DeKalb, and Kendall counties.From start to finish, production of one 1:24,000 scale surficial geology map in northeastern Illinoiscosts, on average, about $250,000. The dollar amount is noteworthy because mitigation ofemerging environmental and health issues, often dealing with water quality or water availability,may be addressed with geologic maps. Having up-to-date and accurate surficial geology mapsand three-dimensional geology maps can potentially save taxpayers roughly ten times the costof the original map (Bhagwat and Berg, 1992; Bhagwat and Ipe, 2000).Today’s applied studies are able to utilize the stratigraphic framework in applied studies byrendering the geology in three dimensions via digital models, cross sections, structure contour4
WINNEBAGOBOONE MCHENRY LAKEOGLEDEKALBKANECOOKDUPAGELEEKENDALLWILLBUREAULASALLEGRUNDYPUTNAMKANKAKEEMapping planned or in progressMapping completeEDMAP areas (mapping complete)County boundaryFigure 4. Location of quadrangles with published surficial geology maps.maps, and other visualizations. Given key stratigraphic points in the area of interest, geologistsmay now explore issues such as the variability of channel sinuosity, width, and depth given aninterpreted environment of deposition. The three-dimensional model may be rendered for use indigital flow models by hydrogeologists to evaluate groundwater availability. In Kane County, forexample, the stratigraphic framework and unit architecture broadly defined by detailed core studiesand mapping (Kempton et al., 1987a,b; Curry et al., 1988; Grimley and Curry, 2001, 2002)was harnessed to code description of the materials noted in about 30,000 water well logs andother observations (Dey et al., 2007a). Isopach and structure contour maps were produced for5
Page 1 and 2: State of IllinoisRod. R. Blagojevic
Page 3: Deglacial History and Paleoenvironm
Page 6 and 7: AcknowledgementsBrandon is grateful
Page 8 and 9: WINNEBAGOOGLEMarengo MoraineWoodsto
Page 12 and 13: Surficial fine-textured layerTiskil
Page 14 and 15: samples, especially diamict units.
Page 16 and 17: OaOgSuWINNEBAGOOgBOONE MCHENRY LAKE
Page 18 and 19: Bedrock valley floor changes in Kan
Page 20 and 21: illite peak (8.8°2) with thecompou
Page 22 and 23: Grayslake Peat (gr)Peoria Silt (not
Page 24 and 25: DEPOSITS OF THE LAST GLACIATIONMaso
Page 26 and 27: WisconsinCheck here ifH homestead c
Page 28 and 29: Table 1 Summary of particle size of
Page 30 and 31: Table 2 Selected physical propertie
Page 32 and 33: l-h0 counts per second50Diamicton,b
Page 34 and 35: Geochronologicand Chronostratigraph
Page 36 and 37: Wisconsin EpisodeAthens Subepisode
Page 38 and 39: MarengoPhaseMarengo MoraineHarvardS
Page 40: Three erosional channels cut across
Page 43 and 44: Boring WAD-05-02Tinley Moraine*DesP
Page 45 and 46: Figure 30 Glacial and lake phases a
Page 47 and 48: were not intended to overlap (North
Page 49: West Chicago Moraine,9c Higgins/Sut
Page 52 and 53: Benn D.I., 2002, Clast fabric devel
Page 54 and 55: Curry, B.B. 2003. Linking Ostracode
Page 56 and 57: Eyles, N. 1983. Glacial Geology: An
Page 58 and 59: Hajic, E.R., 1990. Late Pleistocene
Page 60 and 61:
Johnson, W. H., A. K. Hansel, E. A.
Page 62 and 63:
Leighton, M.M., P. MacClintock, L.E
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Piskin, K., and R. E. Bergstrom, 19
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Vagt, P. J., 1987. Characterization
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STOP 1: Buffalo Rock State ParkLarg
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ner channel began. Previously, thes
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Figure 3 (A) Example of outer erosi
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Stop 2a: Wedron Silica Company Quar
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N N N0.0W20.5W1W3Depth (m)1.01.5Rin
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0.00.2W3W2W1W1W3W2Ringshearresult0.
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to the arrival of the last glaciers
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Sedimentology and stratigraphyThe c
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prairie-like. Pollen analyses may b
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CarboniferousFigure 1 Carboniferous
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Figure 3 Largest and best preserved
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Figure 6 Small normal faults in lam
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and mineralogy, we propose that the
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Stop 4: Oswego ChannelThe 15,770 C-
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NewarkMarseillesIroquoisSt. AnneOsw
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Joliet sublobe;retreat to theValpar
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Sediment coresSeveral sediment core
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formed during the late Livingston P
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are being examined by Professor L.
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assistant secretary of the Smithson
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Annotated Illustrated Guide to the
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Figure 4 The BrewsterCreek mastodon
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Figure 6 The left lower 3rd molar o
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Figure 8 The left upper 3rd molar o
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Figure 10 This slide elaborates on
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Aurora Mastodont Project 2004 - A s
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a full skeleton still buried. Ed Mo
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Figure 17 Field leader Anita Weber
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Figure 18 Paleontologist For A Day
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paleontologist/geologist/archeologi
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scientific rationale behind the see
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tures exposed, from well drained in
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N1 km1 miAA’lbgphhwheA1380 lbFelt
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Table 1 Soil horizonation and depth
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Figure 5 Morphological measure of t
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vial upper solum characteristics, d
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material indicates long term disper
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(Table 1). Sand and silt values oft
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STOP 7: DeKalb moundsArchives of de
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acA A ‘*"e H-2278bde(x)1 kmFigure
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1 kmFigure 4 Typical distribution a
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Vertical exaggeration =20x5 mB-9AWe
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Valve concentration(#/gm, moist)0.0
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200-8Value (‰)-6 -4 -2 0 2 0.00 0
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sions encompass the period of final
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Stop 8: Spring Lake Sand and Gravel
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Stratigraphy and Mechanical Stratig
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ABCDEFFigure 3 Characteristic defor
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a.b.C90 mC'WED85 mD'c.D200 mD'NSd.D
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a.b.c.d. e.LHudSTATION E1 E2 E3LHld
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In the weaker units, several charac
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Stop 9: Thelen Sand and Gravel Pits
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Table 1 Lithofacies code for fluvia
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The erosion of the large semi-circu
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Topset sequences are composed of bo
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APPENDIX A. Description of Profile
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pinches out laterally.4 879.6 10.5
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Deglacial History and Paleoenvironments of Northeastern Illinois

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