File:Penn carbondale 4-1.jpg: Difference between revisions

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|Caption=Figure 4-1.  Chart showing the development of the Pennsylvanian classification in the Illinois Basin. From the Tri-State Committee (2001).   
|Caption=Figure 4-1.  Chart showing the development of the Pennsylvanian classification in the Illinois Basin. From the Tri-State Committee (2001).   
Used courtesy of the Tri-State Committee.
Used courtesy of the Tri-State Committee.
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Latest revision as of 22:44, 28 January 2021

Figure 4-1. Chart showing the development of the Pennsylvanian classification in the Illinois Basin. From the Tri-State Committee (2001). Used courtesy of the Tri-State Committee.

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