. Early Pennsylvanian paleotopography and depositional environments, Rock Island County, Illinois . Fig. 1. Mesocalamites sp. xl Fig. 2. Gulpenia sp. x2 Fig. 3. Samaropsis new berry i xl Fig. 4. Sphenophyllum tennerrimum xl Fig. 5. Lacoea seriata xl Fig. 6. Sphenopteris sp. xl Fig. 7. Mariopteris sp. xl

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Keywords: ., bookcentury1900, booksubjectgeologystratigraphic, booksubjectpal