File:Penn carbondale 4-73.jpg
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Figure 4-73. Five well logs illustrating the Walshville channel and Walshville Member in Franklin County, southern Illinois. Well 2 is the type log for the Walshville Member. © University of Illinois Board of Trustees.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 21:15, 4 January 2021 | | 3,627 × 2,980 (3.05 MB) | IlLex (talk | contribs) |
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