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Figure 4-23. Isopach map of the Francis Creek Shale. From Korose et al. (2003), modified from Smith et. al (1970). Copyright © 1970, 2003 University of Illinois Board of Trustees. +
Figure 4-24. Pods of Francis Creek Shale above depressions in the Colchester Coal as exposed on the highwall at United Electric Coal Companies Banner Mine, SE1/4, NW1/4, sec. 12, T 6 N, R 5 E, Fulton County, Illinois. From Smith et al. (1970). Copyright © 1970 University of Illinois Board of Trustees. +
Figure 4-25. Wolf Bridge section in sec. 13, T 10 N, R 3 E, Knox County, Illinois, the reference section for the Oak Grove Member. From Smith et al. (1970). Copyright © 1970 University of Illinois Board of Trustees. +
Figure 4-26. Diagram showing how Wright (1965) interpreted regional relationships of the Oak Grove Member and adjacent units. Copyright © 1965 Cynthia R. Wright. Used with permission. +
Figure 4-27. Diagram from Wanless (1964), illustrating his hypothesis that the Wheeler and Bevier Coal Beds wedge out into the Oak Grove succession of marine shale and limestone. Used with permission of the Kansas Geological Survey. +
Figure 4-28. Graphic log from the Audubon Oil & Gas No. A-1 Green borehole in sec. 30, T 2 S, R 10 E, Edwards County, Illinois, reference section for the Purington Shale. © University of Illinois Board of Trustees. +
Figure 4-29. Graphic log from the ISGS No. 1 Eric Miller borehole in sec. 2, T 8 N, R 6 E, Peoria County, Illinois, the reference section for the Purington Shale. Coal and limestone units below the Colchester Coal have not been identified. © University of Illinois Board of Trustees. +
Figure 4-3. Log of DTE Methane No. 11-1 Lexington borehole in sec. 11, T 6 S, R 2 E,
Franklin County, Illinois. This is the reference log for the Carbondale Formation. Lithologic patterns in the center column denote cored intervals. © University of Illinois Board of Trustees. +
Figure 4-30. Type section of the Survant Coal Member, as described by Wier (1961).
Data used under Creative Commons license CC BY-NC-SA 3.0. +
Figure 4-31. Graphic log of the Audubon Oil & Gas No. 1 Fritschle borehole in sec. 20, T 6 N, R 9 E, Jasper County, Illinois, the reference section for the Wheeler and Bevier Coals in Illinois. © University of Illinois Board of Trustees. +
Figure 4-32. Graphic log for the ISGS No. 1 CNX Railroad borehole in sec. 8, T 9 N, R 12 W, Clark County, Illinois, the reference section for the Survant Coal (merged Wheeler and Bevier Coals). © University of Illinois Board of Trustees. +
Figure 4-33. Graphic logs of three cores from Iowa illustrating the Wheeler and Bevier Coals. From Ravn et al. (1984). Figure provided courtesy of the Iowa Geological Survey, the University of Iowa. These cores are reference sections for both units. +
Figure 4-34. Map showing the distribution of the Survant Coal and its components in Illinois. © University of Illinois Board of Trustees. +
Figure 4-35. Graphic log from the Audubon Oil & Gas No. 1 Birkner borehole in sec. 24, T 4 S, R 6 E, Hamilton County, Illinois, showing overthickened Survant Coal, evidently in a channel and analogous to the Cardiff, Kerton Creek, and Roodhouse coal beds. © University of Illinois Board of Trustees. +
Figure 4-36. Gamma ray/microresitivity log from the Elysium Energy No. 99 Coen borehole in sec. 9, T 3 N, R 9 E, Richland County, Illinois, illustrating the log response of the lower Carbondale Formation strata. © University of Illinois Board of Trustees. +
Figure 4-37. Generalized section in the Cardiff area, northeastern Livingston County, Illinois, based on a composite of drilling records. © University of Illinois Board of Trustees. +
Figure 4-38. Block diagram showing stratigraphic relationships of the lenticular Kerton Creek and Summum (now Houchin Creek) coals to adjacent strata and the channel of Pleasantview sandstone cutting to Colchester Coal. From Wanless (1952, figure 3). Used with permission of the Nova Scotia Geological Survey. +
Figure 4-39. Drawing showing the Kerton Creek Coal with middle clastic layer, which may be the division between the Wheeler and Bevier Coals. From Searight (unpublished manuscript, 1925-1927, figure 22). +
Figure 4-4. Thickness of the Carbondale Formation in Illinois. From Willman et al. (1975), based on a map by K.E. Clegg. Copyright ©1975 University of Illinois Board of Trustees. +
Figure 4-40. Composite section of Roodhouse Coal, based on ISGS unpublished field notes by G.H. Cady, T.A. Hendricks, J.R. Van Pelt Jr., and H.R. Wanless. © University of Illinois Board of Trustees. +