File:Penn carbondale 4-12.jpg
Figure 4-12. Correlation of the Seelyville Coal Member and associated strata from Illinois to the Midcontinent Basin. Midcontinent data from Gentile and Thompson (2004), Pope (2012), Heckel (2013), and P.H. Heckel (personal communication, Aug. 1, 2014). Not to scale. © University of Illinois Board of Trustees.
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