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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 From Searight (unpublished manuscript, 1925-1927, figure 22).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 Composite section of Roodhouse Coal, based on ISGS unpublished field notes by G.H. Cady, T.A. Hendricks, J.R. Van Pelt Jr., and H.R. Wanless.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. +
Figure 4-41. Reference section of the Lagonda Member in Illinois, a composite of a graphic log based on continuous core from the ISGS Elysium Energy No. 1 borehole and the gamma ray/resistivity log from the closely adjacent Elysium Energy No. 7 Wasson
borehole, both in sec. 27, T 4 N, R 9 E, Richland County, Illinois. © University of Illinois Board of Trustees. +
Figure 4-42. Reference section for the Breezy Hill Limestone Member in La Salle County, Illinois. From Smith et al. (1970). Copyright © 1970 University of Illinois Board of Trustees. +
Figure 4-43. Section from the ravine northeast of Summum, showing the Houchin Creek Coal and enclosing strata. Data from Wanless (1957, p. 204-205). © University of Illinois Board of Trustees. +
Figure 4-44. Graphic log of core (partial) from Freeman United Coal Mining Company hole C-1-74 in sec. 23, T 12 N, R 6 W, Macoupin County, Illinois, the principal reference section for the Excello Shale and Houchin Creek Coal Members in Illinois. © University of Illinois Board of Trustees. +
Figure 4-45. Graphic logs from three cores drilled by Rust E & I in St. Clair County, Illinois, illustrating the unnamed gray shale that locally occurs between the Houchin Creek Coal and the Excello Shale. © University of Illinois Board of Trustees. +
Figure 4-46. Type section of the Hanover Limestone Member, based on ISGS unpublished field notes by J.R. Van Pelt Jr. and T.A. Hendricks (1927). © University of Illinois Board of Trustees. +
Figure 4-47. Four graphic columns from the St. Louis area illustrating local thickening of the Hanover Member on the flank of the Ozark Dome. Column 1 from data from Rubey (1952) and ISGS unpublished field notes by H.R. Wanless et al. Column 2 modified from Knight (1933) and Searight (1959), with data from Gentile and Thompson (2004). Knight (1933) reprinted by permission of the American Journal of Science. Searight (1959) used with permission of the Missouri Geological Survey. Column 3 from unpublished data by W.J. Nelson and J.A. Devera. Column 4 modified from Nelson (2005). Copyright © 2005 University of Illinois Board of Trustees. +
Figure 4-48. Type section of the Covel Conglomerate Bed. From ISGS unpublished field notes by H.B. Willman (1929, 1930). © University of Illinois Board of Trustees. +
Figure 4-49. Gamma-ray, density, and lithologic log from the Energy Plus ME-13 borehole in sec. 31, T 4 S, R 6 E, Hamilton County, Illinois, the type section for the Delafield Member. © University of Illinois Board of Trustees. +
Figure 4-5. Chart showing the chronostratigraphic classification and correlations among the Illinois, Midcontinent, and Northern Appalachian Basins for the Carbondale Formation and adjacent strata. Data from Peppers (1996) and Heckel (2013). Not to scale. © University of Illinois Board of Trustees. +