File:Penn carbondale 4-40.jpg

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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 Composite section of Roodhouse Coal, based on ISGS unpublished field notes by G.H. Cady, T.A. Hendricks, J.R. Van Pelt Jr., and H.R. Wanless.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.

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current17:41, 23 December 2020Thumbnail for version as of 17:41, 23 December 20202,380 × 2,026 (1.08 MB)IlLex (talk | contribs)

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