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File:Figure P-12.jpg Fig. P-12 -- Thickness of the Harrisburg (No. 5) and Springfield (No. 5) Coal Members (based on map by K. E. Clegg).(1,455 × 2,210 (640 KB)) - 22:55, 8 March 2016- {{DISPLAYTITLE:Historical:Springfield and Harrisburg Coal Members}} |tree3=Springfield Coal Member3 KB (457 words) - 22:44, 18 February 2021
- M. E. Hopkins and J. A. Simon ...Kewanee Group (Shaw and Savage, 1912, p. 6; Wanless, 1939, p. 79; Willman and Payne, 1942, p. 86-87; Kosanke et al., 1960, p. 34) is named for Carbondale5 KB (747 words) - 22:02, 24 January 2017
- Nelson, W.J., P.H. Heckel and J.M. Obrad, 2022, Pennsylvanian Subsystem in Illinois: Illinois State Geolo Wier (1951) referred to “partly brecciated limestone” beneath Coal Va as the “Upper Alum Cave.” Wier (1961) proposed the name Antioch Lime7 KB (940 words) - 16:38, 9 February 2022
- Nelson, W.J., P.H. Heckel and J.M. Obrad, 2022, Pennsylvanian Subsystem in Illinois: Illinois State Geolo ....illinois.edu/publications/c605 Nelson, W.J., S.D. Elrick, W.A. DiMichele, and P.R. Ames, 2020, Evolution of a peat-contemporaneous channel: The Galatia c12 KB (1,803 words) - 16:02, 23 August 2023
