Coal fossil. Pteridospermophyta. Neuropteris,most widespread of fossil ferns. Frond width 1.76 inches. Pennsylvanian period,Carboniferous age (300 million years old). Pittsburg coal seam near Finleyville,PA. Collection Penn State | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Clutter, Ted |
Bildgröße: | 3839 px × 2550 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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