File:Figure 38..png
Figure_38..png (373 × 330 pixels, file size: 117 KB, MIME type: image/png)
Coal ball (about 3 ft long and 1 ft thick) near top of the Herrin (No. 6) Coal in the Orient Mine No. 4, Freeman United Coal Company, Williamson County. The roof is limestone on a thin base of shale.
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current | 16:33, February 16, 2024 | 373 × 330 (117 KB) | Samantha.Hager (talk | contribs) |
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