File:Penn carbondale 4-22.jpg
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Figure 4-22. Log of Northern Illinois Gas borehole PON-62 in sec. 2, T 27 N, R 6 E, Livingston County, Illinois. This is a reference section for the Francis Creek Shale Member. © University of Illinois Board of Trustees.
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current | ★ Approved revision 16:16, 23 December 2020 | 2,230 × 2,901 (1.31 MB) | Jennifer.Obrad (talk | contribs) |
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