File:Penn carbondale 4-63.jpg

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Figure 4-63. Klein Bridge and Greenhouse sections of Willman and Payne (1942), the reference sections for the Vermilionville Sandstone Member. These sections also illustrate the presence of the Energy Shale Member above the Herrin Coal in northern Illinois. Data from Willman and Payne (1942, p. 295). © University of Illinois Board of Trustees.

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21:57, 23 December 2020
Thumbnail for version as of 21:57, 23 December 20202,290 × 2,286 (807 KB)Jennifer.Obrad (talk | contribs)