File:Penn caseyville 2-4.jpg: Revision history

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  • curprev 16:0816:08, 23 July 2018IlLex talk contribs 254 bytes +254 Figure 2-4. Isopach map of Morrowan Stage, which essentially corresponds to Caseyville Formation in the Illinois Basin. From Nelson et al. (2013), modified from McKee and Crosby (1975), Grey et al. (1987), Greb et al. (1992), and Droste and Furer (1995).