Petrography and microanalysis of Pennsylvanian coal-ball concretions (Herrin Coal, Illinois Basin, USA): Bearing on fossil plant preservation and coal-ball origins
| Autor: | Siewers, Fredrick D., Phillips, Tom L. |
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| Zdroj: | In Sedimentary Geology November 2015 329:130-148 |
| Databáze: | ScienceDirect |
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