File:Fig43.png
Fig43.png (603 × 393 pixels, file size: 203 KB, MIME type: image/png)
Large concretion in the black, fissile Anna Shale above the Herrin (No. 6) Coal. Note that the top of the coal has been pushed downward slightly under the concretion due to differential compaction.
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current | 17:20, February 16, 2024 | 603 × 393 (203 KB) | Samantha.Hager (talk | contribs) |
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