Early Pennsylvanian paleotopography and depositional environments, Rock Island County, Illinois earlypennsylvani18lear Year: 1985 Guidebooklet: Illinois State Museum 33 Plate 4 Fig. 1. Palaeopteridium reussii x2 Fig. 2. Sphenopteris sp. xl Fig. 3. Sphenopteris sp. xl Fig. 4. Sphenophyllum cuneifolium ? x2 Fig. 5. Samaropsis newberryi xl

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