Ammonite fossils. Section of rock containing Asteroceras (large shell) and Promicroceras (small shell) ammonites. Ammonites,now extinct,were marine invertebrate molluscs with a spiral shell. Most were less than 20 centimetres across. This specimen is from the Lower Lias strata (200 to 180 million years ago),located in Marston Magna,near Yeovil,Somerset,UK | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Natural History Museum, London |
Bildgröße: | 4746 px × 3682 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |