File:C605-Figure-43.jpg
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Figure 43 Map showing the Walshville channel and sulfur content of the Herrin Coal. After Treworgy et al. (2000)[1]. The four named areas of low-sulfur coal are all associated with thick Energy Shale adjacent to the channel.
- ↑ Treworgy, C.G., C.P. Korose, C.A. Chenoweth, and D.L. North, 2000, Availability of the Springfield Coal for mining in Illinois, map summary of Illinois Minerals 118: Illinois State Geological Survey, 1 sheet, 1:500,000.
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current | ★ Approved revision 15:34, 11 July 2020 | 1,812 × 2,639 (555 KB) | Alan.Myers (talk | contribs) |
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