Fossil leaf (Betula sp.) from the Eocene,found in Colorado. Trees of this genus developed during the Tertiary Period and are still common today (birches) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Biophoto Associates |
Bildgröße: | 5143 px × 3395 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: |
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