File:Penn caseyville 2-1.jpg: Revision history

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24 July 2018

  • curprev 15:4815:48, 24 July 2018Jennifer.Obrad talk contribs 238 bytes +238 Figure 2-1. Map showing the type area of the Caseyville Formation and several of its members. Map drafted by Alan Myers. Base is a U.S. Geological Survey Dekoven 7.5-minute topographic map. Base map courtesy of the U.S. Geological Survey.