Ammonite cross section
Numéro d’image : 12248955
| Polished face of a fossil ammonite cut in half, showing the interior makeup of the shell in separated chambers. Ammonites are extinct cephalopod mollusks that lived in the oceans during the Jurassic and Cretaceous periods. They are distantly related to the modern day nautilus and lived in coastal waters and inland seas. Certain species of ammonite existed at specific times within the geological timescale. Their remains can be used for the accurate dating of marine rocks. The specimen here seen is from Cretaceous sediments in Madagascar, genus Cleoniceras in the family of the Hoplitidae. Actual diameter is 9 cm. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Wiersma, Dirk |
| Taille de l’image : | 5616 px × 3744 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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