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Lithology of the immediate roof, rolls, and coal balls in part of Old Ben Mine No. 24 in Franklin County. Anna Shale occurs in elongate belts suggestive of channels (perhaps tidal channels). Rolls occur only under Anna Shale and run parallel with the border between Anna and Energy Shales. Coal balls occur only under marine roof (from Bauer and DeMaris, 1982).
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:18, February 16, 2024 | | 607 × 440 (125 KB) | Samantha.Hager (talk | contribs) |
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