Fossilised plants. Fossilised Annularia sp. plants in a rock. Four leaf whorls are seen around a central stem. These are primitive Calamite plants,which were abundant in the upper Carboniferous (Pennsylvanian) period,between 315-290 million years ago. These plants covered vast areas of what is now Russia,the USA,China and Europe,living around lakes and swamps. This specimen is from Mazon Creek,Illinois,USA | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Amos, Jim |
Bildgröße: | 3450 px × 5392 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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