File:Penn carbondale 4-36.jpg

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Figure 4-36. Gamma ray/microresitivity log from the Elysium Energy No. 99 Coen borehole in sec. 9, T 3 N, R 9 E, Richland County, Illinois, illustrating the log response of the lower Carbondale Formation strata. © University of Illinois Board of Trustees.

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Thumbnail for version as of 17:33, 23 December 20201,739 × 3,445 (1.96 MB)Jennifer.Obrad (talk | contribs)